Answer:
Leah is indicating the development of self-awareness.
Explanation:
In 1972 Beulah Amsterdam of the University of North Carolina published a study that toppled decades of research and kicked off self-awareness. The study procedure was simple: 88 babies aged 6 to 24 months were placed in front of a mirror, all of them had a small red spot on their noses. Then the mothers would point to the baby's reflection in the mirror and ask who the mirror was. The researchers watched the babies' behavior during the tests.
Only babies ages 20-24 could recognize themselves in the mirror. These babies pointed to the red spot on their own noses. This strongly suggests that they recognized the image as their own, became aware of self, so much so that they pointed to the roaring stain on their own noses.
Accordingly, we can see that when Lia touches the red spot on her nose she is demonstrating that developing self-awareness.
Consider this animal cell. Which organelle is labeled A?
A. mitochondrion
B. ribosome
C. Golgi apparatus
D. lysosome
The cell organelle labeled A in the above diagram is: C. Golgi apparatus.
An animal cell can be defined as the fundamental or basic functional, structural and smallest unit of life of an animal such as a horse, camel, sheep, lion, goat, dog, etc.
Cell organelles refers to the organs (workers) that are responsible for the performance of various tasks or functions in the body of a living organism such as an animal, plant, and humans, especially for the survival of the organism.
Some examples of cell organelles found in the body of an animal are:
Mitochondria. Nucleus. Endoplasmic reticulum (ER). Vesicles.Cytoplasm. Cell membrane. Chromosome. Golgi apparatus (bodies).Golgi apparatus is a cell organelle that is saddled with responsibility of preparing protein for export by chemically tagging them and it also produces lysosomes.
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The bladder is an organ in the excretory system. What is the function of the bladder?
A. to take in oxygen and excrete carbon dioxide
B. to break down food into useful nutrients
C. to pump blood throughout the body
D. to store urine until it can be excreted
D. to store urine until it can be excreted
Incidences of witchcraft are found universally among cultures of this time, but none had the devastating impact that Salem’s had. What other factors may have contributed to the phenomena at Salem?
Wegener observed that that coastlines of continents in the Southern Hemisphere had similar grooves. Which of the following supports coastlines far away from one another having similar grooves?
Animal extinction
Glacial movement
Rock formation
Human interactionc
B, glacial movement.
Wegener observed similar grooves along the coastlines of continents in the Southern Hemisphere. These grooves were created by the movement of glaciers. Glaciers generally move in one direction. This movement creates large scratches in rock structures.
When continents are placed together, you can observe that the glacier scratches match up. They move from one continent to another.
Answer:
answer is b hope this helps :)
Explanation:
Reread the first paragraph of the introduction. Describe the types of stimuli your body is reacting to as well as the decisions you have to make. Do you think about each of your responses or do they just seem to happen?
When an accident occurs, our body becomes aware of impetus. When we are panic, our body releases adrenaline in a great amount which causes to increase heartbeat rate and stimulus. Human feels an emergency situation like a fight, and a war feelings. In this condition, he moves rapidly towards or may be away from an accident and panic situations to assist others. This is controlled by adrenaline which is produced by our body.
CSI technicians and first responders are similar in the way _____.
A.they both need specialized skills to obtain the job
B.they often leave the crime scene after the investigation team arrives
C.their first responsibility is to catch the suspect
D.they work under the same set of guidelines
Answer: D. they work under the same set of guidelines
Explanation:
The CSI technicians and first responders are the officials who arrive at the scene of crime on a call of police. These officials work on same set of guidelines. That is they are guided to provide first aid to the victim, asked to secure the scene of crime, searching collecting, packing and transporting the evidences from the scene of crime.
You are an anthropologist investigating the ways that malnutrition in pregnant women can affect the genetic development of their children. What field are you engaging with?
An anthropologist investigating the ways that malnutrition in pregnant women can affect the genetic development of their children is engaging with the field of Medical Anthropology. Medical anthropologists study the impact of cultural and social factors on health, including how nutrition and environmental factors can affect biological development. By examining the relationship between malnutrition in pregnant women and genetic development in children, they contribute to our understanding of the long-term effects of malnutrition.
Explanation:An anthropologist investigating the ways that malnutrition in pregnant women can affect the genetic development of their children is engaging with the field of Medical Anthropology. Medical anthropologists study the impact of cultural and social factors on health, including how nutrition and environmental factors can affect biological development. By examining the relationship between malnutrition in pregnant women and genetic development in children, they contribute to our understanding of the long-term effects of malnutrition.
demonstrate, exemplify, explain, and clarify are in the same word family as witch word A. browse B.ponder. C. identify D. illustrate
C. Identify
The only other possible solution may be D. Illustrate but that is such a specific word I sincerely doubt it.
:)
The word illustrate demonstrate the meaning of exemplifying, explain, and clarify, i.e., option D.
What is the meaning of exemplifying?To be a typical example of something is referred to as exemplification.
The word illustrate is the combination of the words exemplifying, explain, and clarify.
Thus, the correct option is D.
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You want to calculate the displacement of an object thrown over a bridge. Using -10 m/s2 for acceleration due to gravity, what would be the total displacement of the object if it took 8 seconds before hitting the water?
To calculate the displacement of an object thrown over a bridge into water, apply the kinematic equation for displacement with the given time and acceleration due to gravity. The displacement is found to be 320 meters downwards.
Explanation:Calculating Displacement and VelocityUsing the kinematic equation for displacement with constant acceleration to calculate the displacement, s, of an object thrown over a bridge in free fall we have:
s = ut + ½at2
Where:
u is the initial velocity (0 m/s, since it is thrown vertically)a is the acceleration due to gravity (-10 m/s2)t is the time taken before hitting the water (8 seconds)Plugging the values into the equation:
s = (0 m/s)(8 s) + ½(-10 m/s2)(8 s)2
s = 0 + (-5 m/s2)(64 s2)
s = -320 m
The negative sign indicates that the object moves in the direction opposite to the positive reference direction, which is typically upwards. So, the displacement is 320 meters downwards towards the water.
Final answer:
With initial velocity (u) as 0 m/s and time (t) as 8 seconds, the calculation shows that the total displacement (s) is 320 meters in the downward direction.
Explanation:
To calculate the total displacement of an object thrown over a bridge under the influence of gravity, we can use the following kinematic equation for displacement (s):
s = ut + ½ at²
Where:
u is the initial velocity (since we are only considering the vertical motion and there is no mention of initial vertical velocity, we take it as 0 m/s)t is the time (which is given as 8 seconds)a is the acceleration due to gravity (which is given as -10 m/s², where the negative sign indicates that gravity is acting downwards)Substituting the given values into the formula, we get:
s = (0 m/s)(8 s) + ½ (-10 m/s²)(8 s)²
s = 0 + ½ (-10 m/s²)(64 s²)
s = -320 m
The negative sign indicates that the displacement is in the downward direction. So, the total displacement of the object is 320 meters downward.
What is thought to be true about the three domains of living things
A. They diverged from a common ancestor fairly recently.
B. Domains bacteria and archaea evolved after the main groups of eukaryotes.
C. They do not have common ancestor
D. They diverged from a common ancestor before the evolution of the main groups of eukaryotes
Giant kelp have gas-filled sacs to help it float so it can ___________
a)send signals to other plants
b)collect more sunlight
c)trap small fish
About which other carbon–carbon bonds may rotation occur?
The greatest interaction occurs around the carbon carbon single bond.
Explanation:Single bonds in organic molecules are free to rotate, due to the 'end-to-end' (sigma) nature of their orbital overlap.
For example, In ethane rotation about the carbon-carbon sigma bond results in many different possible three-dimensional arrangements of the atoms.
In carbon carbon double bond and triple bonds the atoms are held together more strongly so they show less rotations as compared to carbon carbon single bond.
Final answer:
Rotation around carbon-carbon sigma bonds, such as in ethane, allows for different three-dimensional arrangements of atoms, despite a small energy barrier to rotation. Double bonds, on the other hand, do not permit such rotation, leading to a planar arrangement of atoms.
Explanation:
Rotation Around Carbon-Carbon Sigma Bonds
In organic chemistry, rotation can occur around single covalent bonds, which are known as sigma bonds. The carbon-carbon sigma bond, as found in ethane (CH3CH3), allows for free rotation of the bonded atoms, leading to various three-dimensional conformations. Such bonds are cylindrically symmetrical due to the 'end-to-end' overlap of sp³ hybridized orbitals. Although there is a small energy barrier of about 3 kcal/mol for rotation, it is generally not sufficient to restrict rotation except at very low temperatures.
Unlike sigma bonds, double bonds, described as pi bonds, do not allow for this free rotation, resulting in restricted movement and a planar arrangement of the atoms involved. In the case of sigma bonds, the spatial arrangement of the atoms changes upon rotation, although the molecule itself remains the same. In models or diagrams, different conformations resulting from rotations are represented by the different spatial orientations of the atoms or groups attached to the rotating single bond.
Which of these states would be the best location for solar panels?
A. Montana, because it is covered in dense forests
B. Washington, because it experiences a great deal of cloud cover
C. North Carolina, because it receives a large amount of radiation
D. North Dakota, because it has long winters
The correct answer is option C
The solar panel requires a large amount of heat and radiation for its proper working. The place receiving high amount of sunlight is best for the setup of the solar panels.
The solar energy can be converted into electrical energy for various purposes.
North Carolina receives large amount of radiation and is best location for solar panels.
Match each description to the type of relationship it represents.
TILES
*facultative parasitism
*obligate parasitism
*commensalism
*predator and prey
PAIRS
*A freshwater amoeba feeds on bacteria in the water.
*Armillaria fungi grow within a tree's roots, causing the
tree to rot, but will survive if the tree dies.
*A pseudoscorpion, a type of arthropod, hides under a beetle's wings
for protection and transportation, but does not affect the beetle.
*Rickettsia bacteria can only survive in eukaryotic cells,
which are destroyed when the bacteria replicates
A facultative parasite refers to a species, which may resort to parasitic activity, but is not completely dependent on any host for finishing its life cycle. Therefore, the growth of Armillaria fungi inside a tree's roots, making the tree to rot, but will survive even if the tree dies, is an example of facultative parasitism.
An obligate parasite refers to a parasitic species, which cannot finish its life-cycle in the absence of a suitable host. Therefore, rickettsia bacteria's tendency to surviving only in a eukaryotic cell is an example of obligate parasitism.
A long-term symbiosis or biological association in which members of one species attain benefits while those of the other species is neither harmed nor are benefited is known as commensalism. Hence, a pseudoscorpion, a kind of arthropod hiding under the wings of beetle for protection and transportation, however, it does not affect the beetle is an example of commensalism.
Predation refers to a biological association, where one species, the predator, kills and consumes another species, known as prey. A freshwater amoeba feeds on bacteria in the water is an example of predator and prey.
Facultative parasitism, Armillaria fungi grow within a tree's roots, causing the tree to rot, but will survive if the tree dies.
Explanation:The above given fungi is an example of facultative parasitism because in facultative parasitism the organism lives in host and provide harm to it but it is not totally dependent on host. It can survive after the death of host.
Part 2.Obligate parasitism, Rickettsia bacteria can only survive in eukaryotic cells,
which are destroyed when the bacteria replicates .
Explanation:The rickettsia bacteria is best example of obligate parasitism because in this type of parasitism, an host is obligatory for the survival and reproduction of organism. They need the host and host cell for the completion of their life cycle.
Part 3.Commensalism, a pseudoscorpion, a type of arthropod, hides under a beetle's wings for protection and transportation, but does not affect the beetle.
Explanation:The commensalism is a type of symbiotic interaction between two organisms, in which one get benefited while other neither get benefit nor harm.
Hence in this example of pseudoscorpion, one organism a pseudoscorpion is getting protection from beetle while beetle is unaffected.
Part 4.Predator and prey, A freshwater amoeba feeds on bacteria in the water.
Explanation:Predator pray relationship between two organism, one is benefited while other get harm.
In above example, amoeba uses water bacteria for their food while these bacteria die due to amoeba. So this is obvious predator pray relation.
A quantity of a gas has an absolute pressure of 400 kPa and an absolute temperature of 110 degrees kelvin. When the temperature of the gas is raised to 235 degrees kelvin, what's the new pressure of the gas? (Assume that there's no change in volume.)
A. 854.46 kPa
B. 3.636 kPa
C. 1.702 kPa
D. 510 kPa
A. 854.46 kPa
B. 3.636 kPa
C. 1.702 kPa
D. 510 kPa
A. liquid to a solid.
B. liquid to a gas.
C. gas to a solid.
D. gas to a liquid
Answer: The new pressure of the gas is (A) 854.46 kPa.
The pressure of a given mass of gas at the absolute temperature 110 degrees K is 400 kPa.
The temperature is raised to 235 degrees K with constant volume.
Therefore,
Initial pressure [tex]P_{1}=400kPa[/tex]
Initial temperature [tex]T_{1}=110K[/tex]
Final temperature [tex]T_{2}=235K[/tex]
Final pressure[tex]P_{2}=?[/tex]
According to pressure law of gas,
[tex]\frac{P_{1} }{T_{1} }=\frac{P_{2} }{T_{2} }[/tex] ( at constant volume)[tex]P_{2}=\frac{P_{1}T_{2} }{T_{1} }[/tex]
[tex]P_{2}=\frac{400X235}{110}[/tex]
[tex]P_{2}=854.46kPa[/tex]
Thus, the required new pressure of the gas is 854.46 kPa.
If copper (II) sulfate solution and an iron nail are in contact, a replacement reaction occurs. What would the products of the reaction be?
2Fe + 3CuSO4 → ?
2Fe + 3CuSO4
Fe2(SO4)3 + 3Cu
2Fe + 3Cu + 3S + 3O4
Answer:
2nd option B
Explanation:
Answer:
B:Fe2(SO4)3 + 3Cu
Explanation:
Which process causes Earth to lose thermal energy to space?
Earth to lose thermal energy to space electromagnetic radiation.
What is electromagnetic radiation?
Electromagnetic radiation is made when an atom absorbs energy. The absorbed energy causes one or more electrons to change their locale within the atom.
Which process causes Earth to lose thermal energy to space?Since Earth is surrounded by the vacuum of outer space, it cannot lose energy through conduction or convection. Instead, the only way the Earth loses energy to space is by electromagnetic radiation.
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Lake Mojave is an ancient lake that has dried up and no longer exists in the Mojave desert in California. Which environmental conditions may have occurred to cause the disappearance of the lake and the organisms that live in it? Check all that apply.
decrease in rainfall in the Mojave desert
decrease in temperature in the Mojave desert
decrease in runoff that flows into Mojave lake
increase in blocked streams that flow into Mojave lake
increase in pollution that was deposited into Mojave lake
increase in the nonnative plant population in Mojave lake
The correct answers are:
- Decrease in rainfall in the Mojave desert;
The decrease in rainfall can be devastating to a lake's waters and biodiversity. The decrease in rain usually causes bigger loss of water through evaporation than water coming in the lake, so over time it will dry out, or just small pieces of it will remain.
- Decrease in runoff that flows into Mojave Lake;
If the amount of water that comes into the lake decreases, it can be fatal to it, and in a very short period of time, since the lake will be losing more water than it gets in.
- Increase in blocked streams that flow into Mojave Lake;
Naturally, streams can be blocked and redirected, so if this happens, we have the same situation from before, where the water income is smaller than the water loss of the lake.
Answer:
A, C, & D
Explanation:
Right on Engenuity
I need help with 57 and 58. Thank you in advance
57. Answer is d. less concentrated since water passes from B to A.
Osmosis is the movement of water molecules from a region of higher water concentration to a region of lower water concentration. So water will move from B to A, making it less concentrated solution.
An important part to notice here is that its the movement of water molecules (or any other solvent) through the membrane and not the particles dissolved in the water.
58. Answer is a. It will rise in side A since water (not the substance in it) will tend to pass from the area of greater concentration to the area of lesser concentration.
Answer:
Part 1.
The option A is correct.
Explanation:
• As the solution A is hypertonic as compared to solution B. So water will move from B to A by the process of osmosis.
• Osmosis is the movement of water or other solvent through a plasma membrane or semipermeable membrane from a region of low solute concentration to a region of high solute concentration.
• Osmosis is passive transport, meaning it does not require energy to be applied.
Part 2.
The option A is correct one.
Water level rises in A side tube.
Explanation:
• Because the solution A is hypertonic as compared to solution B. So water will move from B to A by the process of osmosis.
Which is NOT a negative consequence of burning gasoline or petroleum products? A) causes increase in all types of cancer Eliminate B) causes air pollution and acid rain C) releases large amounts of carbon dioxide D) pollutes ocean water when drilling for oil
Burning gasoline or petroleum products does not cause an increase in all types of cancer. The correct option is A.
Effects of pollution from petroleum productsThe burning of gasoline or petroleum products leads to the production of different forms of pollutants. These include air pollutants such as oxides of carbon, particulate matter in smoke, and the pollution of water bodies associated with their mining.
The pollutants have varying degrees of health and environmental effects. Some of the health effects include blood poisoning and lung cancer.
Thus, while the burning of gasoline can cause cancer, the cancer is specific.
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Final answer:
Option A) causes increase in all types of cancer is NOT a negative consequence of burning gasoline or petroleum products because not all cancer types are directly linked to petroleum combustion. Burning gasoline does lead to multiple environmental issues such as air pollution, acid rain, and climate change.
Explanation:
The question asks which option is NOT a negative consequence of burning gasoline or petroleum products. The answer is A) causes an increase in all types of cancer. This statement is not accurate because while petroleum product combustion can increase the risk of certain types of cancer, it is not responsible for an increase in all types of cancer. Numerous factors contribute to the incidence of different cancers beyond exposure to petroleum products.
Option B) mentions air pollution and acid rain, C) discusses the release of carbon dioxide, and option D) refers to ocean water pollution from oil drilling. Each of these are well-known negative consequences of the use of petroleum products. Burning gasoline leads to the emission of various air pollutants such as sulfur dioxides, nitrogen oxides, carbon monoxide, and volatile organic compounds that can cause smog, acid rain, and other health problems. These substances are indeed harmful to the environment and human health, contributing to climate change, respiratory illnesses, and other diseases. Furthermore, offshore oil drilling can result in oil spills which severely affect marine life and ecosystems.
Put these words in order of complexity starting with "cell": Cell, organism, organ, system, tissue
The biological order of complexity is: Cell, Tissue, Organ, System, and Organism. This order represents increasing levels of organization from the basic unit of life (cell) to the complete living entity (organism).
Explanation:The order of complexity starting with 'cell' is as follows: Cell, Tissue, Organ, System, Organism.
These terms represent different levels of organization in biology. A cell is the most basic unit of life. Many cells of similar type form a tissue. Several tissues form an organ, such as your heart or lungs. A group of organs with a specific function make up a system, for example, the circulatory system. Lastly, an organism is a complete living entity, like a human, tree or bacteria.
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Thermal pollution is caused by: carbon dioxide increased heat sulfur dioxide sewage
Answer:
Increased heat
Explanation:
PLEASE ANSWER DUE TONIGHT: What happens if an enzyme is not functioning in a chemical reaction in a living organism that needs it?
The reaction stops.
The reaction proceeds, but much more slowly.
The reaction proceeds faster without the interference.
There is no change in the reaction rate.
If an enzyme is not functioning, the reaction it catalyzes proceeds much more slowly, as enzymes are crucial for reducing activation energy and allowing biochemical reactions to occur quickly enough to sustain life.
Explanation:If an enzyme is not functioning in a chemical reaction in a living organism that needs it, the reaction proceeds, but much more slowly. Enzymes are critical biological catalysts that greatly accelerate the rate at which chemical reactions occur within living organisms. Without the presence of enzymes to reduce the activation energy for reactions, biochemical processes could take substantially longer—ranging from hours to days—instead of occurring in less than a second as they typically do with functional enzymes.
An enzyme's ability to catalyze a reaction is due to its specificity for its substrate, which has a unique shape and electrical charge that matches the enzyme's active site. In addition, an enzyme operates most effectively under certain conditions, like optimal temperature and pH, further emphasizing its role in ensuring efficient biochemical reactions. In sum, if enzymes were not functioning, it would severely compromise the efficiency and viability of biological processes necessary for life.
Describe the path of light rays from a leaf to the retina
ANSWER:
It is reflected out at accurately the alike angle at which it came in, according to the Law of Reflection.
EXPLANATION:
The retina refracts the light rays. The light streams go into the pupil and are permitted into the intrinsic part of the eye when the cornea and the lens refract light, and the upside-down reflection is formed on the retina.
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please help!!! if you can answer all
tissues combine to form organs.
organs combine to form organ systems
which of these a disadvantage of a multicellular organism? it needs more energy
which of these a disadvantage of a multicellular organism? it reproduces slower
which of these an advantage of a multicellular organsim? they can perform complex organ systems
The pea aphid, a type of insect, contains light-capturing pigments in its exoskeleton. Pea aphids gained the ability to synthesize these pigments from genes transferred from fungi. While pea aphids do not have chloroplasts or fix carbon, researchers have found that pea aphids with more pigments have higher levels of ATP than those with fewer pigments. Pea aphids also have been shown to increase production of ATP when exposed to sunlight. Based on this information, is the pea aphid a true autotroph?
Answer:
The correct answer is D
Explanation:
Based on the information given we can not say pea aphid as an autotroph. Because pea aphid ability to produce ATP in the presence of sun is due to the light-capturing pigment that it gains from the genes transferred from fungi.
As pea aphid do not have any chloroplast and it cannot fix carbon so it is not a true autotroph. We can say it false autotroph because it can produce ATP in the presence of sunlight and can show increased production of ATP at the higher level of pigment.
The pea aphid is not a true autotroph as it cannot fix carbon into organic compounds, despite having light-capturing pigments from fungi via HGT that allow for increased ATP production. True autotrophs like plants have structures like chloroplasts for photosynthesis, which aphids lack. Their pigments provide energy advantages but do not change their primary nutritional mode.
Explanation:Is the Pea Aphid a True Autotroph?
Despite the pea aphid's unique ability to synthesize light-capturing pigments in its exoskeleton and producing more ATP when exposed to sunlight, it is not considered a true autotroph. True autotrophs can fix carbon and create their own food via photosynthesis or chemosynthesis, processes that typically involve converting inorganic carbon into organic molecules.
While pea aphids have acquired the capability to make pigments through horizontal gene transfer (HGT) from fungi and these pigments allow them to capture more energy from sunlight, resulting in higher ATP levels, they do not have the necessary structures, such as chloroplasts, nor do they fix carbon to be classified as autotrophs. They rely on consuming other organisms, such as plant phloem, for their carbon-based nourishment.
Carotenoids are pigments responsible for the red coloration in pea aphids that absorb certain wavelengths of light. While having light-capturing pigments does increase their ATP production, potentially giving them an energetic edge, it is not equivalent to the autotrophic process of making organic compounds from inorganic sources. The increased fitness of red aphids in some environments, due to greater resistance to insecticides, does not shift their fundamental mode of nutrition from heterotrophy to autotrophy.
The _______ is located in your upper arm. A. fibula B. tibia C. femur D. humerus
The answer is D) Humerus. Hope this helps :)
The humerus is located in your upper arm
The American Board of Forensic Entomologists certifies scientists who study_____.
pollen
insects
trees and other plants
DNA
The answer is insects because the study of insects is entomology
The correct answer is B. Insects
Explanation:
The American Board of Forensic Entomologists or ABFE is an organization in the U.S. that offers certifications to Forensic Entomologists. On the other hand, Forensic Entomology is a field related to both criminology and biology that focuses on studying insects in relation to crime scenes or decomposition. Considering Entomology is the study of insects while Forensic science focuses on criminal investigation. For example, through Forensic Entomology it is possible to determine when a person died based on the presence of insects. According to this, the American Board of Forensic Entomologists certifies scientists who study insects in the criminal context.
Based on this information, what type of transport is used for glucose in blood and intestinal cells?
What type of transport is involved in this process?
Glucose is transported across the apical plasma membrane (from the lumen inside the cell) of the intestine via the sodium-glucose cotransporter (Na/glucose cotransporter)- The gradient of the Na is established by the Na+/K+-ATPase. This means that the absorption of the glucose is secondary active transport. Glucose is then transported into the extracellular fluid via the glucose transporter and that is the process of facilitated diffusion (passive process, since glucose flows down its concentration gradient).
Glucose is transported in blood and intestinal cells through active transport, specifically secondary active transport or co-transport. This is an energy-requiring process where glucose is moved from low to high concentration.
Explanation:The transport of glucose in blood and intestinal cells is accomplished through a process known as active transport. In this process, carrier proteins in the cell membrane move glucose, against its concentration gradient, from an area of low concentration (outside of the cell) to an area of high concentration (inside the cell). The process requires energy in the form of ATP (adenosine triphosphate).
This is done through a specific type of active transport known as secondary active transport or co-transport, whereby glucose is transported into cells along with sodium ions.
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Which pair of amino acids is indistinguishable in peptide sequencing by tandem mass spectrometry?
The correct answer is Leucine (Leu) and Isoleucine (Ile).
Because the amino-acids leucine and isoleucine have the same mass they don’t differ by tandem mass spectrometry.
Tandem MS (MS/MS) is a technique which includes the breakage of the selected molecules (precursor ions), such as proteins into fragments (product ions), such as peptides. The fragments then reveal aspects of the chemical structure, such as amino acids of the precursor ion. The process have a few steps:
• Ionization of the samples to generate a mixture of ions,
• Selection of precursor ions of a specific mass-to-charge ratio (MS1)
• Fragmentation of precursor ions (MS2) to generate a product ions for detection.
Val and AlaSer, ThrPhe and TryAsn, Gln, Leu and lie are the pairs of amino acids which are indistinguishable in peptide sequencing by tandem mass spectrometry. Amino acids are organic compounds which combine to form proteins. These are building blocks of our Life.