Answer:
Stimulus, sensor, and response.
What determines the shape of the active site?
The shape of the active site in a given enzyme is determined by the amino acid residues of the protein and the interaction between such amino acids and also molecules in the physiological conditions of the surrounding media.
What is the active site in a given enzyme protein?The active site in a given enzyme protein is the molecular domain in the enzyme that binds to the substrate in a chemical reaction in order to form the enzyme-substrate complex that will be converted into products. The shape of the active site in the protein enzyme also depends on the amino acids in the domain that binds to the substrate and also to the molecular interactions.
Therefore, with this data, we can see that the active site in a given enzyme protein is dependent on the amino acids in the protein and their interactions.
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An unusually cold winter causes the squirrel population to decrease. This is an example of temperature as a
A. Carrying capacity
B. Limiting factor
C. Climax community
D. Pattern in space
Please and answer thank you!
Answer:
Most likely B
Explanation:
A - Carrying capacity is the amount of a species that can live in a given area with the given resources, weather does not apply.
B - Limiting factors are things such as food, mates, and competition with other organisms for resources, which can limit the maximum population. Temperature can be applied here, it is the best option.
C - Climax community is when an area's ecosystem is stable, so the term makes no sense used here.
D - To be honest I have no clue what this is. But making an assumption from the term, the winter being "unusually cold" does not make it a "pattern". So I don't think it's this option. I could be wrong, but I assume this is not the right choice.
A forest has not experienced any severe weather changes for several years. The ecosystem supports a stable population of deer. What is the most likely reason for this stability?
Answer:
The most likely reason for this stability is that the forest has remained relatively unchanged for several years, which allows the deer population to stabilize
why are the polio virus unable to reproduce if their DNA base sequence is different from the normal virus?
Answer:
When the virus infects a cell, the RNA genome enters the cell and programs it to make new virus particles. These virus particles are released from the cell and go on to infect new cells. In humans, poliovirus is ingested, and replicates in cells of the gastrointestinal tract.Poliovirus, the prototypical picornavirus and causative agent of poliomyelitis, is a nonenveloped virus with a single-stranded RNA genome of positive polarity. The virion consists of an icosahedral protein shell, composed of four capsid proteins (VP1, VP2, VP3, and VP4), which encapsidates the RNA genome (1).RNA viruses generally have very high mutation rates compared to DNA viruses, because viral RNA polymerases lack the proofreading ability of DNA polymerases. The genetic diversity of RNA viruses is one reason why it is difficult to make effective vaccines against them.
c. Challenge: You are working with a neuronal cell line isolated from a human brain tumor. It appears to have a neuronal phenotype when grown in culture on laminin coated dishes but appears to have more of a typical round, small (3 to 5 micrometer) phenotype when grown on a standard, collagen-only coated dish or a poly-lysine coated (positive charge only - no ECM component) dish. Under all 3 cases the cells attach to the substrate. You suspect that the reason the neuronal phenotype is supported by the laminin coating is due to the ability of laminin, but not collagen or poly-lysine, to bind to the integrin receptors RGD binding domain thus triggering a molecular cascade that leads to the expression of the neuronal phenotype. How might you test this hypothesis
Answer:
This process can be performed using immunofluorescence analysis via antibodies.
Explanation:
To test for the hypothesis
To test for the hypothesis we have to analyze whether the neuronal phenotype is due to the binding of laminin to integrins, and this will enable us to determine which integrins are abundantly expressed on the neuronal cell membrane. This process can be performed using immunofluorescence analysis via antibodies
Finally when no differentiation markers are expressed in the laminin coated plates with mutant cells we can now say that it expresses integrins
Histone modification: is fixed; once a histone is modified, it stays that way and the genes with which it is associated are turned on or off permanently. is random and independent of the environment or cell type. is fixed, but this has no effect on whether genes are expressed. can change over time in response to environmental cues, allowing genes to be turned on or off as needed. can change over time in response to environmental cues, but this has no effect on gene expression.
Answer:
The correct answer is ''can change over time in response to environmental cues, allowing genes to be turned on or off as needed.''
Explanation:
Histones are a family of proteins involved in compacting DNA into structural units called nucleosomes. Histone modifications occur in response to environmental conditions, and modulate the structure of chromatin, that is, they alter the structure of nucleosomes and therefore chromatin, and thus activate the transcription process, in which the chromatin is in the euchromatin state (loose conformation, in which the DNA information can be read), or "off" state, in which the chromatin adopts the heterochromatin conformation (compact conformation, which prevents reading), respectively. These post-translational modifications are mainly acetylation, methylation, phosphorylation, although there are many others. These make up the “histone code” that can change the expression pattern of some genes by modifying the chromatin structure, activating or silencing these genes.
A scientist makes a claim that a chemical in household cleaners causes cancer. Which question should other scientists ask about the claim if they are using scientific argumentation?
A. Is there too much of the chemical present in the cleaner
B. Should the cleaner be taken off the market
C. Are there safer chemicals that could be used in the cleaner?
D.are there other possible causes of cancer?
D. are there other possible causes of cancer?
Scientific argumentation involves testing hypotheses through rigorous experimentation and examination of evidence. In this case, before drawing any conclusions about the relationship between the chemical in the household cleaner and cancer, other scientists would want to examine whether there are other possible causes of cancer that should be considered. The scientist who made the claim would need to show through experiments and studies that the chemical in question is the cause of cancer and not some other variable that was not controlled in the study. And therefore, evaluating the evidence and testing the hypothesis is the fundamental part of scientific argumentation.
Which of the following is a treatment option for endometriosis?
O A.
Pain relievers
O B.
Hormone therapy
O C. Surgery
OD.
All of the above
Answer:
A
Explanation:
Not sure if it's right but yea
Answer:
The Answer is D: All of the above
Explanation:
Which of the follow statements is TRUE?
ОА. .
The hormones released from the endocrine system can cause changes in the nervous system.
OB.
The nervous system can stimulate or Inhibit the release of hormones.
It takes longer for the body to respond to the endocrine than the nervous system, but its effects usually last longer.
OC.
OD. All of the above
Answer:
D. All of the above
What evidence would you observe if the
law of conservation of mass is obeyed
when mixing two solutions?
Help:(
Answer: You should have noticed that the number of atoms in the reactants is the same as the number of atoms in the product. The number of atoms is conserved during the reaction. However, you will also see that the number of molecules in the reactants and products are not the same.
Kidneys are part if rhe excretory system in a human body.they purify the impure blood and sned it back to the rest of the body. Which system is mainly responsible for the transport of plasma to the kidneys?
Answer:
circulatory system
Explanation:
The circulatory system is mainly responsible for the transport of plasma to the kidneys
Answer:
Circulatory system
Explanation:
Which step in photosynthesis does not need light?
Answer: Dark Reaction
Explanation: Its the second stage of photosynthesis and it does not require light.
What is the structure of a nucleotide? What are DNA's four nucleotides, and how do they pair up?
Answer:
Attached to each sugar is one of four bases--adenine (A), cytosine (C), guanine (G), or thymine (T). The two strands are held together by hydrogen bonds between the bases, with adenine forming a base pair with thymine, and cytosine forming a base pair with guanine.
Soil generation and soil conservation are equally effective agricultural strategies.
Please select the best answer from the choices provided
OT
OF
Answer:
Your Answer is True. True
Select the correct arrowheads on the image.
The image shows point and non-point sources of water pollution. Which two sources are point sources of water pollution?
rural homes
city streets
agriculture
suburban
development
animal feedlot
coal-burning power plant
factory
Answer:
The two point sources of water pollution in the image are coal-burning power plant and factory.
Explanation:
Pollution refers to the release of waste and harmful substances to the environment. Substances which are harmful to the environment are known as pollutants.
Water pollution involves the contamination of water by pollutants making it unfit for human use such as such for drinking or cooking or for other uses.
The source of pollution water bodies have been divided into point and non-point sources of water pollution.
Point sources release pollutants from a single source and are transported directly through media such as a discharge pipe. The main point source of water pollution are factories and sewage treatment plants.
Nonpoint source pollution comes from various sources usually a combination of pollutants from a large area rather than from a specific sourc that can be easily identified such as discharge pipes. Most common is runoff water from city streets or agricultural settlements.
The two point sources of water pollution in the image are coal-burning power plant and factory
Answer:
The two point sources of water pollution in the image are coal-burning power plant and factory.
Explanation:
Lisa has a glass that has a mass of exactly 100 grams. She puts exactly 45 grams of acid in the glass, and then she adds 15 grams of crushed limestone. When the limestone touches the acid, it makes bubbles. Lisa waits until the reaction stops, and then she weighs the glass and its contents. What should Lisa expect to find about the mass of the glass and its contents when she puts it on a scale?
Answer: Mass is more than 145 g but less than 160 g
Explanation: Acid and limestone reacts forming water, salt and
Carbon dioxide CO2. Because CO2 is gas it is bubbled away from
glass and that's why mass is less than 160 g. Because limestone
releases CO2 and products from acid remain in solution, mass is more than 145 g. If amount of acid in moles is enough, all limestone reacts.
Roughly 44% of mass of limestone CaCO3 forms CO2 and we can estimate mass of gas is 0.44·15 g = 6,6g , so mass would be 153 g
what is significant about anaphase
Answer:
It ensures that duplicated chromosomes, or sister chromatids, separate into two equal sets
Explanation:
Different species are distinguished by their (1 point)
O diet
O DNA
O size.
O physical appearance.
Different species of organisms are distinguished by their: B. DNA.
What is a species?A species can be defined as a biological classification of related organisms that have the same (similar) characteristics and they are capable of mating (breeding) with one another in a cycle or different seasons.
Based on scientific information provided through genetics, different species of organisms are distinguished by their deoxyribonucleic acid (DNA).
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1. Individuals with thicker fur had a survival advantage in the cold...
2. Random mating
3. The green skin color is being selected over blue skin color.
4. DNA.
5. They show intermediate steps in the evolution process.*
6. Different islands had very different food resources available...
7. Those who have traits that help them survive are able to reproduce...
8. It makes them unrecognizable to the immune system
9. The exposure of human populations to less UV light required...
10. The correlation between air pollution and white moth predation
11. It is a biological process that leads a population to have a widespread...
12-16 Essays
a plant without sent that makes a large amount of pollen is pollinated by
Answer: Wind
Explanation: Wind pollinated flowers are dry, light, have small or no petals, do not produce scent or nectar and pollen grains are produced in abundance.
They have these qualities, so that they can be easily flown away, and if any of them are wasted it won't affect as they produce pollen grains to supply their species.
Credit to: Frencesca, on brainly.
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Which of the following is NOT a way in which humans increase biodiversity?
Introduction of invasive species
Building artificial reefs
Removal of pollutants
Restoration of local communities
Answer:
restoration of local communities
Which therapeutic cloning application is most likely a benefit to society?
A) production of a new line of mouse cells for research
B) creation of a new flower variety for gardens in dry climates
C) generation of nerve tissue for treating paralyzed patients
D) formation of a new liver to be transplanted into a child
ASAP: Which of the following statements about scientific theory is false?
(1 Point)
Scientific theories are explanations of natural phenomena that do not change over time.
Scientific theories are explanations of the natural world based on strong scientific evidence.
Scientific laws that are widely accepted become scientific theories.
Answer:
im not sure im just telling because you are in hurry i think it is the first answer
I NEED HELP FAST PLS
which planet is most like the sun, Jupiter or Earth? Justify your answer
Answer and Explanation:
Jupiter is more like the sun than the Earth is because Jupiter the composition is similar to the Sun's composition (what it is made of), including hydrogen and helium.
Jupiter is also a failed star, in which it has the right composition, but isn't massive enough to be a star.
#teamtrees #PAW (Plant And Water)
Describe the modifications that can be done on a polypeptide chain to make it a fully functional
protein
Answer: Polypeptide chains undergo some modifications before they become fully functional. Some of these modifications include: proteolytic cleavage, lipidation and glycosylation. Proteolytic cleavage refers to the removal of some amino acids from a polypeptide chain by proteases in order for the protein to become active. An example of a substance that is modified through this process is insulin.
Explanation:
What is nutrition? Write two examples of nutrients
Answer:
Nutrients are chemical compounds in food that are used by the body to function properly and maintain health. Examples include proteins, fats, carbohydrates, vitamins, and minerals.
Explanation:
hope this helps
The image does not show orders of insects. Suggest three categories of insects that would likely
be grouped into orders
Three categories of insects that would likely be grouped into orders include:
Beetles (Coleoptera)Flies (Diptera)Wasps, bees, and ants (Hymenoptera)What are insects?Insects are a class of invertebrates within the arthropod phylum that have a chitinous exoskeleton, a three-part body (head, thorax, and abdomen), three pairs of jointed legs, compound eyes, and one pair of antennae.
There are over a million known species of insects, which are found in nearly every environment on Earth and play important roles in ecosystems as pollinators, decomposers, and food for other animals. Some examples of insects include ants, bees, beetles, butterflies, and flies.
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Roger Sperry's chemoaffinity hypothesis Group of answer choices is supported by the orderly reinnervation of the frog optic tectum by regenerating retinal ganglion cells. was based upon his discovery of cell adhesion molecules in the optic tectum. relies on the random innervation of the optic tectum by retinal neurons correctly predicted that each optic tectal neuron-retinal axon pair would have a unique molecular lock-and-key recognition signal.
Answer:
is supported by the orderly reinnervation of the frog optic tectum by regenerating retinal ganglion cells
Explanation:
In vertebrates, the optic tectum represents the major part of the midbrain (mesencephalon), which is involved in the development of motor skills such as body movement, eye movement, vision, hearing, etc. In lower vertebrates such as, for example, frogs, the primary target of the optic nerve fibers (i.e., retinal ganglion cells) is the optic tectum, which is responsible for the visually guided behavior. Roger Sperry was a neurobiologist and pioneer brain researcher who won the Nobel Prize in Medicine for his investigations in neuroscience and experimental neurology. In 1940, R. Sperry made different experiments involving the visual system of frogs and he observed that when optic fibers are damaged they grow back to their original localization in the optic tectum in order to re-establish the original set of neural networks. From this observation, R. Sperry proposed his chemoaffinity hypothesis, which states that neurons have individual identification tags that specify synaptic networks.
2. What organs does your body use to collect the information described in the last question?
Answer:
BRAIN??????
Explanation:
WHAT WAS THE LAST QUESTION>
A yellow round seed pea crossed with a green flat seed. the set up will be
YYRR
yyrr
The yellow tall are dominant
crossing hom. o zygous vs hom. ozygous
give the first set pick two of the first set and make a second set
Answer the following questions from the second set
1- Hom.zygous for yellow tall
2- Heterozygous for yellow tall
3- Hom.zygous for green flat.
Answer:
2 i think .... soooooooo confusing
Bedbugs are small insects that live in and around the bedding of humans and feed on humans at night. Their bites cause redness,
itching, and swelling at the site of the injury. They can be small and difficult to see during the day when the linens are cleaned. In
order to remove bedbugs, an insecticidal agent is often used. In this case, pyrethroid was chemically added to a population of
bedbugs. The number of bedbugs in the infestation was significantly reduced. However, over time, the bedbug population rebounded
and further application of the pyrethroid was not successful. Evaluate which statements describe what occurred with the bedbugs and
select ALL that apply.
Answer: A, B, C
Explanation: I got the answer from USA test prep