Answer: Smooth endoplasmic reticulum
Explanation: There are numerous organelles present in the cell and each one performs specific function. The function to detoxify drugs and toxic substances entering the cells is performed by smooth endoplasmic reticulum. It is present in contact with rough endoplasmic reticulum, and outside the nucleus. It is called as "Smooth ER" because it lacks ribosomes.
Which statement most accurately explains how allosteric regulation can change an enzyme's catalytic activity?
Out of the following given choices;
In allosteric inhibition, a regulatory molecule binds to a location other than the active site, resulting in a change in enzyme shape that allows the active site to bind substrate.
In allosteric activation, a regulatory molecule binds to a location other than the active site, resulting in a change in enzyme shape that allows the active site to bind substrate.
In allosteric inhibition, a regulatory molecule binds to the active site, blocking substrate binding.
In allosteric activation, a regulatory molecule binds to the active site, allowing substrate binding.
The answer is B. When an effector molecule binds to an allosteric site, the enzyme changes conformation causing the enzyme to have a high affinity for its ligand at the active site. A good example to explain allosteric regulation is hemoglobin (which is not an enzyme though). The subunits of the hemoglobin have allosteric effects on each other. When oxygen binds to one subunit, its conformation change causing the subunit to bind to the allosteric site of adjacent subunits. This subsequently causes the other subunits to have more affinity for oxygen in their oxygen-binding active sites.
During which checkpoint do cell proteins determine whether growth factors that stimulate cells to divide are present
To promote shell formation in eggs ,what can be added to the diet of layers?
To promote shell formation calcium should be added more often the diet of layers. Calcium is an important mineral for egg shell quality. It is the main component of the egg shell which consists of 95% of calcium carbonate. Deficiency of calcium in the diet of layers may lead to the reduction in eggs size and also the production, poor egg quality with high chances of breakage and also an increased layer mortality.
Which of the following is an example of instrumental aggression?
A. cutting off another driver in heavy traffic
B. holding up a bank (bank robbery)
C. shoving another person during an argument
D. performing a headlock on an attacker
The right option is B.
holding up a bank (bank robbery)
Instrumental aggression is a form of aggression which is carried out as a
means of securing some reward or to achieve a specific goal. Holding up a bank
(bank robbery) is an example of instrumental aggression because it is done for a
specific goal which is to obtain
money, assets or other property owned or held by the bank.
Answer: Option B
Explanation:
Instrumental aggression can be defined as showing an aggression for achieving goals. It is made o achieve some reward or to achieve an external goal such as victory.
In case of bank robbery the people will achieve money( reward) which acts as a signal of victory for the robbers.
So, bank robbing is an example of instrumental aggression.
Erin is keeping a science journal. She wrote the following paragraph that explains how light travels through different mediums. But she’s made one mistake. Which sentence in Erin’s journal is incorrect? A ray of light passes through the air and enters the water inside a metal container. The light ray bends as it crosses the boundary between air and water. Once it hits the bottom of the container, the ray gets reflected. The reflected ray passes back through the water and enters the air without bending. In this example, the ray of light is both reflected and refracted.
The incorrect sentence in Erin's journal would be that the reflected ray passes back through the water and enters the air without bending.
How does light travel through different media?Light rays travel from medium A to medium B and get refracted depending on the density of the 2 media.
Thus, when a light ray travels from air to water, it gets refracted at a particular angle and when the reflected ray travels back from the water to air, it also gets refracted at the same angle.
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The incorrect sentence in Erin's journal is: 'The reflected ray passes back through the water and enters the air without bending.'
Erin's journal contains a mistake related to the behavior of light when it travels between different mediums. Specifically, the incorrect sentence is:
'The reflected ray passes back through the water and enters the air without bending.'
Light rays refract (bend) when they transition from one medium to another, such as from water back into air, due to the change in speed as they move from a denser to a less dense medium. Therefore, the reflected ray should also bend when it moves from water to air.
Here is the corrected version of the paragraph:
A ray of light passes through the air and enters the water inside a metal container.The light ray bends as it crosses the boundary between air and water.Once it hits the bottom of the container, the ray gets reflected.The reflected ray passes back through the water and bends as it enters the air again.In this example, the ray of light is both reflected and refracted.This explanation aligns with the principles of refraction and reflection in physics.
Fungi are both beneficial and destructive. this fungus is living in and on the tree seen here. this is a ____________ relationship and could cause the tree to ______________.
a.helpful; grow
b.parasitic; die
c.helpful; make fruit
d.symbiotic; reproduce
When a predator eats its prey, all the energy from the prey is transferred into the biomass of the predator
A) true
B) false
Answer is B) false.
According to 10 % law of energy transfer, when a predator such as hawk eats its prey such as snake in a grassland ecosystem , only 10 % of the available energy of the prey (snake) is transferred into the biomass of the predator (hawk). Most of the remaining energy is lost as heat to the environment.
Which series correctly lists the order of species (from a to
e.that belong on the timeline?
Answer:
The correct answer is A. afarensis, A. africanus, H. habilis, H. erectus, H. sapiens
Explanation:
How can the nurse determine a patient's history of allergies? (select all that apply.) by administering a dose and monitoring the patient's response by looking at the front of the chart or in the patient's electronic medical record (emr) by asking the patient by looking at the mar by looking at the patient's allergy bracelet?
Why is it so important to be able to amplify dna fragments when studying genes? dna fragments are too small to use individually. a gene may represent only a millionth of the cell's dna. restriction enzymes cut dna into fragments that are too small. a clone requires multiple copies of each gene per clone?
Answer: Option A
Explanation:
It is important that the fragment of DNA should be amplified in order to get an optimum of DNA which is to be used for any purposes. While performing any experiment or using the DNA for research purposes requires DNA in a amount which is easily used for experiment.
A small size of DNA or a fragment of DNA is not suitable for the experiment. Any detection of bacterial growth, et cetera requires DNA in an optimum amount.
So, it should be amplified prior to the experiment.
Each cerebral hemisphere can be roughly divided into four lobes. which lobe processes auditory information?
Which describes genetic information prior to the beginning of mitosis?
The correct answer is Chromatin.
Chromatin refers to the complex of proteins and DNA, which develops chromosomes inside the nucleus of eukaryotic cells. DNA is not visible in the free linear strand; it is enveloped around the nuclear proteins and is highly condensed so that to get fit within the nucleus.
The basic structural unit of chromatin is nucleosome. Due to its composition, it describes the genetic information before the start of mitosis.
Are carriers that consist of monoglycerides, fatty acids, and lecithin, and serve to transport digested fats from food to the intestinal cells.
In an experiment involving planar bilayers, a solution of table salt (sodium and chloride ions in water) is added on the left side of the membrane while pure water is added on the right side. after 30 minutes the researchers test for the presence of ions on each side of the membrane. the right side tests negative for ions. what can you conclude?
In the experiment, table salt was placed on one side of a selective membrane and pure water on the other. After testing, the absence of ions on the pure water side indicates that the membrane only allowed sodium ions to pass, blocking chloride ions.
In an experiment involving planar bilayers, researchers added a solution of table salt (sodium and chloride ions in water) on the left side of the membrane and pure water on the right side. After thirty minutes, the presence of ions was tested on each side of the membrane, with the right side showing negative for ions. Considering the membrane is made from a polymer that allows only the diffusion of positive ions, we can conclude that the membrane is acting as a selective barrier, only permitting the passage of sodium ions (Na+) and not allowing chloride ions (Cl-) to pass through. This is consistent with the behavior of semipermeable membranes that are selective in their permeability to different types of ions.
A scientific hypothesis must be both ______and capable of being proved false
Answer:
Testable
Explanation:
A hypothesis refers to a testable statement that is made about the nature of particular observation or relationship. It is testable, that is, hypothesis can be tested for being true or false by experimentation. If the results of the experiment are in accordance with hypothesis, it is accepted. On the other hand, if the results do not explain the hypothesis, it is proved false.
A scientific hypothesis must be both testable and capable of being proved false.
A scientific hypothesis must be both testable and capable of being proved false.
A hypothesis is a tentative explanation or prediction that can be tested through experiments or observations.
It should be possible to design experiments or make observations that have the potential to disprove the hypothesis.
For example, if a hypothesis states that all swans are white, it can be tested by observing swans in different locations.
If a researcher finds a black swan, it would disprove the hypothesis.
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In order for transcription to happen, DNA must
Answer: Unwind
Explanation: Transcription is a process where a DNA strand is used to make a copy of mRNA. A complementary mRNA strand is made from the DNA strand. This mRNA is then later used to make proteins. In this process the junk information, present in DNA in form of introns is also spliced.
DNA is a double stranded structure, which is present in helical structure and both the strands are twisted together. In order to make the mRNA copy with the help of the enzyme RNA polymerase, DNA must open up. Then only RNA polymerase will be able to access the nucleotides of DNA.
Why do ribosomes attach to the endoplasmic reticulum?
Ribosomes are known to be the protein synthesizer of
the cell and the attachment of the ribosomes to the membrane of the endoplasmic
reticulum is to make it rough endoplasmic reticulum. However, the process of
protein synthesis usually starts when mRNA moves from the nucleus to ribosomes
on the surface of the rough endoplasmic reticulum.
In which habitat is one likely to find plants that have developed extremely large, broadleaf, evergreen leaves for gathering light, epiphytes, and climbing vines that strangle other plants?
a.taiga
b.kelp forest
c.tropical rainforest
d.temperate deciduous forest
Answer:
C. tropical rainforest
Explanation:
Because of the very dense canopy in the rainforest, little sunlight reaches the ground. For this reason most rainforest tree leaves are large and dark green, which aid them in capturing more sunlight for the photosynthesis process. Some trees will grow large leaves at the lower canopy level and small leaves in the upper canopy. These are strategies to reach sunlight in a leafy ecosystem where the light input is low.
The climbing vines apply this strategy of growing to maximize the sunlight they receive. Many start life in the canopy before sending roots down to the ground.
The Epiphytes live on the surface of other plants to make the most of the sunlight in the canopy layer.
Answer:
tropical rainforest
Explanation:
Choose the correct answer.
Which phylum includes animals that lack tissues?
A. Cnidaria
B. Porifera
C. Platyhelminthes
D. Arthropoda
E. Chordata
Answer is B. Porifera
Members of the phylum porifera includes animals which lack tissues. These animals are also called sponges. These are the simplest multicellular animals. Even though they are multicellular, they do not have any tissues or organs. They have cellular level of body organization. Sponges are aquatic animals and water plays a major role in the feeding, exchange of gases and as well as excretion.
Final answer:
Phylum Porifera, which includes sponges, is the group of animals that lack true tissues, classifying them as parazoans.
Explanation:
The phylum that includes animals which lack true tissues is Porifera. Members of phylum Porifera, commonly known as sponges, are parazoans and do not possess true tissues. They display a simple organization and have multiple specialized cell types, but these do not form the complex tissues seen in more advanced organisms, like eumetazoans. Unlike the sponges in phylum Porifera, eumetazoans, such as those in the phylum Cnidaria, have true tissues, including outer and inner tissue layers. This structure enables more complex functions and body plans. Hence, the correct answer to the question of which phylum includes animals that lack tissues is B. Porifera.
This is the science of genes, heredity and variation of organisms.
Answer:
It's genetics
Explanation:
if an dna molecule is compared to a spiral staircase, what parts make up the steps.
A)pairs of nitrogen bases.
B)sugar and nitrogen base.
C)sugar and phosphate.
D)pairs of sugars.
Answer:
Option A, pairs of nitrogen bases
Explanation:
The helical structure of DNA if compared to the spiral staircase then, the following structure of spiral staircase will resemble to the following parts of DNA -
a) The spiral staircase's hand rail will be equivalent to the sugar phosphate base of DNA that holds the nitrogenous base
b) The steps of spiral case will be equivalent to the pair of nitrogenous base
Nitrogenous base pair include
- Pair of adenine (A) and thymine (T)
- Pair of guanine (G) and cytosine (C)
Thus, option A is correct
Charles Darwin studied finches on the Galapagos Islands. While the finches on all the islands came from the same ancestors, the distance between the islands was too great to allow finches from different islands to interbreed. Over time, the size of the finches on the different islands remained the same, but the shape and size of their beaks changed, as shown here. This adaptation helped the finches find food on their particular island. The change in the size and shape of the finches’ beaks was MOST LIKELY caused by A) geographic isolation B) a change in climate. C) endangerment of the species. D) a decrease in the mutation rate. 9)
The answer Is A (hope this helps)
Which of the following is not a cycle? A. The Moon B. Earth's movement around the Sun C. The Season D.Tornadoes
What percentage of patients with whooping cough die?
A.10%
B.18%
C.30%
D. 1%
The correct answer is option D, that is, about 1 percent.
Pertussis also is known as a whooping cough is a highly contagious bacterial disorder. In the beginning, the symptoms are generally identical to those of the common cold with a fever, runny nose, and mild cough. This is succeeded by weeks of extreme coughing fits.
Pertussis is caused by the bacterium Bordetella pertussis, it is an airborne disease. An estimated 16.3 million people globally were infected in 2015. The majority of the cases take place in the developing nations, and the individuals of all age groups can get affected. About 1 percent of the patients with whooping cough die annually.
The death rate from whooping cough is less than 1% globally, with higher rates generally in developing countries. The best answer to the question is D. 1%, but this is still higher than the reality in many locations.
Explanation:The mortality rate of whooping cough, also known as pertussis, is relatively low in developed countries thanks to vaccines and improved healthcare systems. According to the World Health Organization (WHO), the average death rate globally is far less than 1%, with higher rates generally occurring in developing countries due to limited access to medical care. Thus, the closest correct answer here is D. 1%, but even this is an overestimate for many places.
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Which blood pressure readings for an adult would prompt a diagnosis of hypertension? a. 110/70 b. 140/96 c. 119/79 d. 130/79?
Which specimen had tiny hind legs with a mobile knee and several toes and lived 35-40 mya? Basilosaurus Pakicetus Sinonyx Ambulocetus
Which part of the brain is most involved in control proceeses such as impulse control, emtion control, and long term planning?
A 79 year-old male resident of a long term care facility has contracted clostridium difficile and is experiencing consequent diarrhea. auscultation of the man's abdomen indicates hyperactive bowel sounds. what processes in the man's small intestine is most likely accompanying his current status?
Which is not a specific function of the right hemisphere of the brain?
Final answer:
The specific function not associated with the right hemisphere of the brain is language processing, as the left hemisphere primarily controls these verbal abilities.
Explanation:
The question asks which function is not specific to the right hemisphere of the brain. The right hemisphere is known for its capabilities in recognizing objects, including faces, patterns, and melodies. It excels in perceptual skills and can efficiently complete tasks like putting puzzles together and drawing pictures. On the other hand, verbal abilities, including the ability to speak, write, and understand language, are predominantly located in the left hemisphere. Therefore, the specific function that is not associated with the right hemisphere is language processing.
This distinction between hemispheres illustrates the brain's lateralization, where different functions are predominately controlled by one hemisphere over the other. While the right hemisphere excels in spatial and nonverbal reasoning, it has very limited verbal abilities, pointing to the specific function of language processing as not being a specific function of the right hemisphere.
What are two properties shared between the eye and all other astronomical detectors??
Light collecting is one important property. This is determined by the diameter of the aperture and primary lens of the astronomical detector. The pupil of the eye is analogical to the aperture of the detector.
Another property is the formation of an image. Astronomical detectors have photosensors that convert the photons of light to electrical energy. This is analogical to the eye retina (rods and cones).