Answer:
True
Explanation:
An electric current can
only flow when there is
a closed path in which
electrons can move.
Match the different levels of protein organization with their definition.
Levels of organization:
1. Primary structure
2. Secondary structure
3. Tertiary structure
4. Quaternary structure
Definitions:
A. Linear sequence of amino acids in the polypeptide chain
B. Three-dimensional structure of a polypeptide
C. Highly regular local sub-structures such as α-helix and β-pleated sheet structures
D. Three-dimensional structure of a multi-subunit protein
Select one:
a. 1-C, 2-D, 3-B, 4-A
b. 1-A, 2-C, 3-B, 4-D
c. 1-D, 2-A, 3-B, 4-C
d. 1-A, 2-B, 3-D, 4-C
e. 1-C, 2-D, 3-A, 4-B
In Protein Structure, the primary structure is a sequence of amino acids, the secondary structure involves local arrangements like α-helix and β-pleated sheet structures, tertiary structure details the larger 3D shape of a single polypeptide chain, and quaternary structure outlines the arrangements of multiple polypeptides in a protein.
The four levels of protein structure organization match with their definitions as follows:
Primary structure - A. Linear sequence of amino acids in the polypeptide chain
Secondary structure - C. Highly regular local sub-structures such as α-helix and β-pleated sheet structures
Tertiary structure - B. Three-dimensional structure of a polypeptide
Quaternary structure - D. Three-dimensional structure of a multi-subunit protein
Hence, the correct answer is option B.
The primary structure is determined by the sequence of amino acids that forms the polypeptide chain.
The secondary structure consists of local arrangements in the polypeptide chain such as α-helix and β-pleated sheet structures.
The tertiary structure represents the larger scale, three-dimensional arrangement of a single polypeptide chain.
Lastly, the quaternary structure is the arrangement of multiple polypeptides, or subunits, in a protein that has more than one polypeptide chain.
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What happens when nutrient levels become too concentrated in rivers, lakes, and oceans?
When nutrient levels get too high, water quality degrades and oxygen levels are depleted through a process known as
Answer:
Eutrophication is what happens when nutrient levels become too concentrated in rivers, lakes, and oceans. Eutrophication is when the levels of nutrients and minerals in a body of water become too concentrated. It is usually induced by the release of nitrate or phosphate-containing substances into a water body.
Explanation:
Which of the following is an organic molecule
A. Iron oxide
B.Oxygen gas
C.Water
D.Sucrose
Answer:
c water (h2o)
Explanation:
if you begin cutting a piece of copper in half and continued cutting it in half until you had the smallest piece you would end up with
A anew substance
B an atom
c a molecule
Answer:
B: an atom
Explanation:
An atom is the smallest substance that can exist in isolation.
Hence, if a piece of copper is continually divided, eventually the smallest particle you would get in an atom.
Miguel lives near Miami, Florida. His home receives electricity from the Turkey Point power plant which uses nuclear energy to provide electricity to homes and businesses. What is used to provide energy in a nuclear power plant?
A.
chemical reactions
B.
nuclear fission reactions
C.
nuclear fusion reactions
D.
physical change
The energy in a nuclear power plant, such as the Turkey Point facility, is generated through nuclear fission reactions, where heavy atom nuclei split and release heat, facilitating electricity production.
Explanation:The Turkey Point power plant in Miami, Florida, which provides electricity to Miguel's home, uses nuclear fission reactions to generate energy. In a nuclear fission reaction, the nucleus of a heavy atom, such as uranium or plutonium, splits into two smaller nuclei. This reaction releases a large amount of heat energy, which is used to produce steam. The steam then drives a turbine connected to a generator, which in turn, produces electricity.
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Draw the Lewis Dot Structure for NaCl
as an ionic bond.
Can you please give me a better idea of what to do?
Why do organs need a constant supply of blood?
a. To continually clean the organs, blood must constantly pass through them.
b. To continually help the cells within the organs change into new types of cells
c. To continually produce energy, your organs need oxygen and the oxygen is
carried in your red blood cells.
d. None of the above
please only answer if you know the actually answer
Answer:
to continually produce energy,your organs need oxygen and the oxygen is carried in your red blood cells.
To continually produce energy, your organs need oxygen, and the oxygen is carried in your red blood cells, option C is correct.
The constant supply of blood is vital for maintaining the proper functioning of organs due to the oxygen they require to generate energy through cellular respiration. Hemoglobin in red blood cells binds to oxygen in the lungs, and this oxygen-rich blood is pumped by the heart to organs through an intricate network of blood vessels.
Cells extract oxygen from the blood, facilitating the production of adenosine triphosphate (ATP), the energy currency of cells. Additionally, blood carries nutrients and removes waste products, contributing to organ health. Thus, the continual circulation of blood ensures the delivery of oxygen and nutrients necessary for energy production and overall cellular activities in organs, option C is correct.
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how does crossing over contribute to genetic diversity
Answer:
Crossing over, or recombination, is the exchange of chromosome segments between non-sister chromatids in meiosis. Crossing over creates new combinations of genes in the gametes that are not found in either parent, contributing to genetic diversity.
Explanation:
Crossing over is a genetic phenomenon that occurs during meiosis, resulting in the exchange of genetic material between homologous chromosomes. This process introduces new combinations of genes and contributes to genetic diversity. For example, crossing over can result in offspring with new color variations.
Explanation:Crossing over is a genetic phenomenon that occurs during meiosis, the process of cell division that produces gametes (sperm and eggs). It is the exchanging of genetic material between homologous chromosomes, resulting in the formation of new combinations of alleles. This process significantly contributes to genetic diversity in a population as it introduces new variations and combinations of genes.
During crossing over, portions of the chromatids of the homologous chromosomes break off and switch places with the corresponding portions on the opposite chromatids. This exchange of genetic material leads to the creation of recombinant chromosomes, which carry a unique combination of genes not present in either parental chromosome. These new combinations of genes can then be passed on to offspring, resulting in increased genetic diversity.
For example, let's consider a gene for flower color, where there are two possible alleles: red and white. If an individual carries one chromosome with the red allele and another chromosome with the white allele, crossing over can result in recombinant chromosomes carrying a red allele on one chromatid and a white allele on the other. This can lead to offspring with new color variations, such as pink or blend of red and white, contributing to genetic diversity within the population.
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How were Redi’s and Pasteur’s experiments different? Redi studied broth, but Pasteur tested meat. Pasteur studied flies, but Redi tested meat. Pasteur tested for microorganisms, but Redi studied larger organisms. Redi tested for microorganisms, but Pasteur studied larger organisms.
Answer: C. Pasteur tested for microorganisms, but Redi studied larger organisms.
Explanation:
Redi had conducted experiment with spoiling meat; Pasteur experimented with broth. Redi discredited spontaneous generation for huge life forms by delineating that the maggots emerged from meat just when flies laid eggs in the meat.
Pasteur utilized his celebrated swan-neck flask experiment, to part of the discussion. On his experiment air is permitted to contact the broth. Microorganisms present in the residue were not ready to explore the convoluted curves in the neck of the flask.
(B.) Redi experimented with rotting meat; Pasteur experimented with broth.
valence electrons are important because
A) They form chemical bonds with other atoms
B) They tell which period the element is in
C) They take isotopes
D) They identify the element
Answer:
A) They form chemical bonds with other atoms
Explanation:
In chemistry, a valence electron is an outer shell electron that is associated with an atom, and that can participate in the formation of a chemical bond if the outer shell is not closed; in a single covalent bond, both atoms in the bond contribute one valence electron in order to form a shared pair.
How do population cycles impact trophic levels?
Answer: Top predators, or tertiary consumers can also be keystone species. ... Without their predator, the populations of these herbivores grows out of control as they eat all their food source, the producers. Like changes in other trophic levels, without the producers, the entire ecosystem can collapse.
Explanation: Food webs illustrate energy flow from primary producers to primary consumers (herbivores), and from primary consumers to secondary consumers (carnivores). ... Under top-down control, the abundance or biomass of lower trophic levels depends on effects from consumers at higher trophic levels. So yeah!
Answer:
If one’s trophic level increases or decreases too much, it can impact the number of producers. This in turn depletes the energy in the food web, which can disrupt homeostasis.
Explanation:
coursehero
Which of the following is NOT a fate of a protein that is produced by the rough ER?
It functions inside of an organelle that is a member of the endomembrane system.
It functions in the cytoskeleton as a tubulin component of microtubules.
Is is secreted from the cell similar to how the protein called insulin is secreted from pancreatic cells.
It functions as a glycoprotein in the membranes of the golgi apparatus.
Answer:Is is secreted from the cell similar to how the protein called insulin is secreted from pancreatic cells.
Explanation:
Answer:
The second statement is incorrect.
Explanation:
The proteins generated in the rough endoplasmic reticulum can be sorted to the cell membrane, Golgi apparatus, exterior to the cell, and lysosome.
As a component of microtubules tubulin is found in cytoplasm and these proteins of cytoplasm originate due to the translation process undergone by the cytoplasmic ribosomes, not by the ribosomes present on the rough endoplasmic reticulum. Thus, these proteins are not a component of endomembrane system.
This picture showes
A. Weathering
B.erosion
C. Deposition
D.all of the above
Answer: No Picture Included
Explanation:
which molecule do plants use to store extra glucoses
Answer:
starch
Explanation:
does this help you?
Plants store extra glucose in the form of starch, a complex carbohydrate. This stored glucose can be broken down when needed for energy, such as at night when photosynthesis cannot occur.
Explanation:Plants store extra glucose in the form of a molecule called starch. Starch is a complex carbohydrate, made up of many glucose units linked together. Plants make glucose through the process of photosynthesis, but they can't use all the glucose they produce right away.
So, to store this extra glucose for later use, plants will link many glucose molecules together to form starch. This starch can then be broken back down into glucose when the plant needs more energy. For example, at night, when the plant can't perform photosynthesis, it may break down its stored starch into glucose to continue its metabolic functions.
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which best describes the structure of a DNA molecule!
A. Two strands of RNA linked together
B. Two strands of amino acids linked together
O
c. A strand of DNA linked to a strand of RNA
D. Two strands of DNA linked together
Answer:
D. two strands of DNA linked together
Explanation:
calculate what is the surface area to -valume ratio of a cube whose sides are 3cm long?
Answer:
2 : 1
Explanation:
The surface area of the cube;Area of one (1) side * 6 sides = 3 *3 * 6 = 54 cm²
Volume;Length * Width * Height = 3 * 3 * 3 = 27 cm³
Surface area – to – volume ratio;54 : 27 = 2 : 1
What are the subatomic parts of the atom and what is their charge ?
The subatomic parts of an atom are the protons, neutrons, and electrons. Protons have a positive charge, neutrons have a neutral(no) charge, and electrons have a negative charge.
An enzyme is a protein that____
An enzyme is a protein that accelerates a specific chemical reaction within a cell by reducing the activation energy. Each enzyme is specific to certain substrates and doesn't alter the free energy of the reactants or products, but merely makes the bond breaking and forming processes happen more readily.
Explanation:An enzyme is a protein that substantially speeds up the rate of a specific chemical reaction within the cell by lowering the activation energy. Each enzyme is highly specific, only acting on certain substrates to either break them down (catabolic enzymes), build more complex molecules (anabolic enzymes), or affect the rate of reaction (catalytic enzymes). These enzymes, which are composed of amino acid chains, bind to these substrates and hold them in a certain way to make the process of breaking and forming bonds happen more readily. However, it is crucial to note that enzymes do not alter the free energy of the reactants or products, nor do they change whether a reaction is exergonic (spontaneous) or endergonic.
An example of an enzyme is salivary amylase that is involved in the breakdown of amylose, which is an element of starch.
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Is bread cell organization a living or non living
Bread cell organization is a non-living structure created by yeast cells during the fermentation process when making bread.
Explanation:Bread cell organization is a non-living structure. Bread is composed of cells, but these cells are not living because the bread itself is a product of cellular organization by yeast. Yeast is a single-celled fungus that undergoes fermentation to produce carbon dioxide gas, which causes bread to rise. Once the fermentation process is complete and the bread is baked, the yeast dies, and the cells become non-living.
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Which of the following processes enables cells to stay within the limited range of conditions in which they function best? a biodiversity b metabolism c adaptation d homeostasis
Answer:
D. Homeostasis
Explanation:
Homeostasis is the internal equilibrium maintained by the cells. If the homeostasis gets disturbed than diseases might occur. The cells maintain its equilibrium throughout the body. With the change in the external environment, the cells also adjusts itself to maintain its stability inside the body.
For example - at higher altitude, the oxygen concentration of the environment is less and to compensate the low oxygen content in the atmosphere, the number of red blood cell inside the body increases.
how might the speed of climate change affect the ability of life on earth to adapt and survive
Answer:As the climate warms, it changes the nature of global rainfall, evaporation, snow, stream flow and other factors that affect water supply and quality. Specific impacts include: Warmer water temperatures affect water quality and accelerate water pollution.
The speed of climate change might affect the ability of life on earth to adapt and survive as follows:
Climate change is a phenomenon that includes those alterations in climatic parameters: temperatures, precipitations, diverse climatic phenomena, etc.
Normally these types of changes occur over several centuries, allowing animal and plant species to gradually adapt to new weather conditions.
However, when the climate changes rapidly, ecosystems lose the opportunity to adapt, with the consequence of producing migrations of living beings and even the death of those who for some reason cannot migrate.
When the speed of climate change exceeds the speed of dispersal of organisms, or when there are barriers that prevent such dispersal, species can only adapt or become extinct.
Regarding individuals, it has been found that climate change could affect their development, physiology and behaviors during the growth, reproduction and migration phases. On the other hand, it is also probable that the modification in the precipitation patterns and the increase in temperature affect the distribution, size, structure and abundance of the populations of some species. This, added to the effects of climate change on the hydrological cycle, could affect the interactions between species, nutrient cycles and the functioning, structure and distribution of ecosystems.Therefore, we can conclude that the speed of climate change might affect the ability of life on earth to adapt and survive, causing ecosystems to lose the opportunity to adapt, thus causing changes in the stability and survival of populations.
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The idea that all living things are made up of cells is considered scientific law. This means the idea
is an emerging scientific idea that has a logical explanation.
has been tested with similar results at least twice.
is supported by scientific consensus and a large amount of evidence.
has been rejected only once by the scientific community.
Answer:
The answer is C. This means the idea is supported by scientific consensus and a large amount of evidence.
Answer:
The Answer is C
Explanation:
Of the three types of muscle pictured below, what type of muscle allows you
to move your leg to kick a soccer ball?
Answer:
Skeletal muscles
Explanation:
Skeletal muscles act on the bones and joints to power movement. To kick the ball, the skeletal muscles of the thighs and calves are responsible for the movement of the leg. The antagonist actions if muscles like the tibialis anterior and gastrocnemius below the knee move the knee joint. The skeletal muscles of the thighs quadriceps, the hamstrings, and the adductors move the leg from the hip joint.
Answer:
the smooth looking skeletal muscle there are no pictures provided
Explanation:
20.
What makes up the backbone of a DNA molecule?
ribose and deoxyribose
nucleic acids
RNA molecules
sugars and phosphates
Answer:
Sugars and phosphates
Explanation:
DNA is deoxyribonucleic acid.
The backbone is based on a repeated pattern of a sugar group (deoxyribose) and a phosphate group.
The image below shows one straightened-out strand of DNA with a backbone of alternating sugars and phosphates.
A is wrong. There is no ribose in DNA.
B is wrong. The nucleic acids A, C, G, and T join one strand of DNA to the other.
C is wrong. There is no RNA in DNA.
Answer:
D. Sugars and phosphates
Explanation:
DNA or deoxyribonucleic acid which is a self-replicating material present in nearly all organisms and the constituent of chromosomes, It is also the carrier of the basic instructions of life!
We have a total of 23 chromosomes in our cells!
hope this helps
sincerely,Ur cat friend kittylike11Why is wafting chemicals important?
Answer:
It is very important to not inhale chemicals because when strong acids and bases get into your lungs, they mix with the water in your lungs and can cause burns. Your lungs are sensitive to many chemicals because the alveoli sacs are on one cell layer thick.
2. Which of the following is NOT a clue that a chemical change has occurred? (1 point)
change in color
production of a gas
formation of a precipitate
change in shape
Answer:
D. Change in shape
Explanation:
Change in shape is the physical property of the substance. Chemical change of the compound is observed during a chemical reaction. Change in colour, production of the gas, formation of a precipitate are the examples of chemical change and can be sensed easily.
Vapour pressure, boiling point, density and shape are the examples of physical properties of compounds. Chemical change also leads to change in texture of the compound. A compound has both physical and chemical properties and its chemical reaction is enhanced by the catalyst.
Look at the chemical reaction below.
Answer:
Mg and HCl are both reactants.
MgCl2 and H2 are both products.
Explanation:
In general, things on the left side of the chemical reaction are reactants (things that react) and things on the right side are products (things that are produced).
This is why the answer is what it is.
Which two fields of study provide the core information that is used to classify organisms?
anatomy and artificial selection.
morphology and biochemistry.
morphology and anatomy.
artificial selection and biochemistry
Answer:
morphology and biochemistry
Explanation:
The two fields of study are: Morphology and anatomy
I'll give you an example of it, imagine that you found a mysterious insect in the forest, you don't know anything about it, you take it with you and give it to your biology teacher. The first thing that he is going to take a look at is at its anatomy, how the insect looks like, how many paws it has, wings, colors and etc.
After that, the teacher will probably ask you a few questions about the place you took the insect from, how was it, was it deep, lots of trees around, water near it, any fruit trees nearby, and by that, the teacher will analyze how this animal probably live, just by its habits with your information, if you're not sure about it, he'll need to check it out about how its body works, using again morphology and anatomy, and by doing that, is how you classify an organism.
why are formulas used to describe substances
Answer:
Chemical formulas are used to describe the types of atoms and their numbers in an element or compound. ... When more than one atom of a specific element is found in a molecule, a subscript is used to indicate this in the chemical formula.
Explain how oxygen is cycled between the plant and woman shown in the picture.name the specific processes involved
---------------------------------
The woman inhales oxygen produced by the plant in the process of PHOTOSYNTHESIS,
and she use it inside her body to release energy from the food molecules by the process of RESPIRATION also as a result of respiration Carbon dioxide gas is produced, which she exhales.
That carbon dioxide is absorbed from air by the plant and use it to prepare food from it in the presence of sunlight by the process of PHOTOSYNTHESIS in which oxygen is also produced as byproduct which is then released to air and is then inhaled by the woman again to repeat the cycle.
_____________________
The specific process involved is called photosynthesis.
The female inhales oxygen produced by means of the plant inside the procedure of photosynthesis and she or he uses it inside her frame to launch strength from the meals molecules through the process of respiratory additionally due to respiration Carbon dioxide gasoline is produced, which she exhales.
That carbon dioxide is absorbed from the air through the plant and used to put together meals from it in the presence of daylight by way of the technique of photosynthesis wherein oxygen is also produced as a byproduct which is then released into the air and is then inhaled by way of the lady again to repeat the cycle.
What is photosynthesis?Photosynthesis is the method by way of which flowers makes use of daylight, water, and carbon dioxide to create oxygen and electricity in the form of sugar. Photosynthesis is the manner via which flora uses daylight, water, and carbon dioxide to create oxygen and electricity in the form of sugar.
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