The control of the synthesis of the transferrin receptor depending on the presence or absence or iron is an example of:

A reactant that fits into the active site of an enzyme is called a substrate, this substrate is changed into a product with the help of an enzyme.

The enzyme is used to increase the rate of reaction by lowering the activation energy, during the reaction substrate fits on the active site of the enzyme and converts into the product.

It is used as a catalyst to speed up the reaction of any particular system, biocatalyst are the enzymes used to increase the rate of reaction in the biological system.

During the enzyme catalyzes reaction there are only the reactant changes into the product and at last, an enzyme released the product and is ready for the next reaction, there is no change in the structure of the enzyme.

Therefore, the substrate fits into the active site of an enzyme.

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Answer:

B.)Photosynthesis removes carbon dioxide from the atmosphere, and cellular respiration puts it back.

Explanation:

One of the ways in which photosynthesis differs from respiration is that photosynthesis removes carbon dioxide from the atmosphere and cellular respiration puts it back.

Answer:

Option D

amount of sunlight absorbed

Answer:

It helps to introduce plants in new areas where seed germination fails to produce mature plants due to changes in environmental factors and the soil

Explanation:

Answer:

Because they are all under the world so they have take time to understand them.

Answer:

Explanation:

Immunosuppressant drugs might be needed to prevent rejection of a kidney received from a donor other than an identical twin because the body usually issues an immune response to destroy new tissue that is still foreign.

Immunosuppressant drugs are a group of drugs used to suppress the work of the immune system. This drug serves to prevent rejection reactions after organ transplants.

The body's immunity is a group of cells that function against various attacks by viruses and bacteria that cause disease in the body. Through the immune system, the body will defend itself against various foreign objects that enter the body by destroying or neutralizing these foreign objects. So an immunosuppressant drug is needed when someone has just had a transplant. This drug will help the body to weaken the immune system in order to reduce the body's overreaction to the newly transplanted organ.

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The DNA fingerprinting technique that examines the length variation of DNA repeat sequences in human DNA is called Variable Number Tandem Repeat (VNTR) analysis.

VNTRs are DNA regions that comprise short, repeating nucleotide sequences. Because the number of repeats at a specific VNTR locus can differ between people, it is a useful tool for DNA profiling.

VNTR research entails amplifying VNTR regions with PCR and then sorting the amplified fragments by size with gel electrophoresis.

Unique DNA profiles can be produced by comparing the size and number of amplified fragments between different people, which can then be used for identification and other purposes.

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Answer:

C

Explanation:

because im right obviously, give me brainliest please!

A novel bacterial colony develops antibiotic resistance. Due to a handful of the bacteria population's features making them stronger than the others, this occurs naturally. One illustration of antibiotic resistance is this.

Antibiotic usage is the primary contributor to antibiotic resistance. While some bacteria die when humans take antibiotics, resistant bacteria can live and even proliferate. Antibiotic usage increases the prevalence of microorganisms with resistance. Bacteria have a greater probability of developing antibiotic resistance the more often we use antibiotics.

Bacteria can evolve antibiotic resistance through mutation and selection. For instance, although some bacteria have evolved to create enzymes to inactivate antibiotics, others have built biochemical "pumps" that may remove an antibiotic before it reaches its target.

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Answer:

Passive transport moves molecules and ions from a higher concentration to a lower concentration without any energy while active transport does the same thing only it uses energy. Osmosis deals with the net movement of solvent molecules through a membrane with a higher solute concentration. Osmosis and active transport both work together, while osmosis does its own movement the active transport moves the dissolved solutes across a membrane against a concentration gradient.

Active transport and passive transport are almost the same they function the same only one doesn't require energy while the other one does. Hence why active transport and osmosis work well together it's because of the energy that helps transport dissolved solutes.

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Cardiomyocytes are found in the walls of the heart appear striated striped and are involuntarily controlled. Smooth muscle fibers are found in the walls of hollow internal organs, except the heart which appears spindle-shaped, and are also involuntarily controlled.

Cardiomyocytes have a central nucleus like smooth muscle but they also have striations, like skeletal muscle. types of muscle tissue. Both skeletal and cardiac muscles appear striated or striped because their cells are arranged in bundles.

Smooth muscle lacks striations because the cells are arranged in sheets rather than bundles. Smooth muscle cells are spindle-shaped with a single central nucleus and no muscle. They are called involuntary muscles. Cardiac muscle has branched fibers, one nucleus per cell, strips, and intercalated discs. Its contractions are not subject to voluntary control.

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Answer:

The dark colored moths were due to a genetic mutation, and were more than likely present before the Industrial Revolution. Their fitness was low because predators could easily see them on the light-colored trees. They would be eaten before they could reproduce and pass on their genetic mutation. After the trees became darkened by soot, the darker colored moths now had the survival advantage, able to "hide" from predators. The lighter colored moths became more visible to predators, and the advantage shifted. Now, the light colored moths were more visible to predators, were eaten, and didn't have the chance to reproduce. The darker moths with the mutation had the survival advantage, blending in with the soot-covered trees, and were able to reproduce at higher rates, passing the mutation on to later generations.

The following options are involved in coating Staphylococcus with host proteins are clumping factor, coagulase AND protein A.

What is Staphylococcus?

Staphylococcus is a common bacterium that is typically found on the skin or in the nose of most individuals. Staph infections are caused by this bacterium, which can lead to skin infections, pneumonia, and bloodstream infections.

What is the role of Clumping factor?

Clumping factor, or clumping factor A, is a protein found on the surface of certain strains of Staphylococcus aureus that plays a role in the bacterium's ability to infect human tissues by promoting the clumping of bacterial cells.

What is Coagulase?

Coagulase is an enzyme produced by some Staphylococcus bacteria that can clot plasma. This clotting mechanism protects the bacterium from the host's immune system.

What is Protein A?

Protein A is a surface protein found in some strains of Staphylococcus aureus. Protein A binds to the Fc portion of immunoglobulin G (IgG) antibodies, which protects the bacteria from phagocytosis by immune cells and promotes bacterial survival.

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Answer:

Answer:

The answer is ribosome because that carry the protein and stuff and it the thing that makes a chain

Explanation:

The part of the cell is responsible for connecting the amino acid monomers to make protein ​polymers is ribosomes. The correct option is D.

Ribosomes are small cell organelles that are present in both prokaryotic and eukaryotic. They synthesize protein in the cell.

The majority of integral proteins are transmembrane, which implies that they can pass through the lipid bi-layer, the cytosol, and the extracellular fluid. Integral proteins are deeply buried in the cell membrane and extend into or throughout the lipid bilayer.

Peripheral proteins, which are not firmly attached, are typically found towards the membrane's inner or outer surface.

Therefore, the correct option is D. Ribosomes​ regarding the synthesis of proteins.

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Answer:

A

Explanation:

Interneurons can be defined as neurons that communicate only with other neurons.

Interneurons, also known as association neurons, are found in the central nervous system (CNS) and play a crucial role in integrating and processing sensory information. They receive inputs from sensory neurons and communicate with other interneurons and motor neurons to generate appropriate responses. Unlike sensory neurons and motor neurons, interneurons do not directly interact with the external environment or control muscle movement. Instead, they help to process and relay information within the CNS, allowing for complex behaviors and responses to stimuli.

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Answer:

Explanation:

Answer:

50%

Explanation:

Roan color is controlled by two codominant alleles. Let us assume that the red color allele is R and the white color allele is W. Thus, the roan color would be RW.

Roan color cow is crossed with a white bull;

    RW   x   WW

RW   RW   WW   WW

RW = roan = 50%

WW = white = 50%

1/2 or 50% of the offspring would be roan color while the remaining 1/2 or 50% would be white in color.

After eating a food low in mineral salts, a process known as absorption causes the body to absorb the mineral salts. The bulk of nutrient absorption happens in the small intestine, where absorption happens.

All necessary minerals enter the plant's cellular structure naturally through a process known as mineral uptake, which usually follows the same route as water. Mineral nutrients are absorbed by both the roots and the foliage.

Both internal and external variables influence how quickly minerals are absorbed. Temperature, light, oxygen concentration, H+ ion concentration, plant growth, and ageing are the main contributors to these variables.

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Answer: Protozoans are simple organisms , or living things.

Explanation:

Answer:

Protozoa (also protozoan, plural protozoans) is an informal term for a group of single-celled eukaryotes, either free-living or parasitic, which feed on organic matter such as other microorganisms or organic tissues and debris.                           Mark me as brainiest

Explanation:

The condition characterized by small clots made up of platelets and large forms of von Willebrand factor is known as thrombotic thrombocytopenic purpura (TTP).

TTP is a rare blood disorder that involves the formation of abnormal blood clots throughout the body. In TTP, there is a deficiency or dysfunction of a protein called ADAMTS13, which is responsible for breaking down large von Willebrand factor multimers. When these large von Willebrand factor multimers are not properly regulated, they cause platelet clumping and excessive clotting, leading to organ damage and various symptoms, including low platelet count (thrombocytopenia), microangiopathic hemolytic anemia, and purpura (purple discoloration of the skin). Prompt diagnosis and treatment are essential in managing TTP and preventing serious complications.

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When viewing protists in this lab, applying a drop of methyl-cellulose may be necessary to slow the movement of the organisms so they are more easily viewed.

In a lab where organisms like protists are to be studied, methylcellulose will be a common ingredient in such labs.

Methylcellulose allows microbiologists to keep the cell of the protists intact and the behavioral activity of the protist is also maintained by methylcellulose.

Protists have cilia which allow them to move fast. Hence, for studying protists, a microbiologist needs to limit the movement of protists. Methylcellulose is known for restricting the movement of cilia hence a drop of methylcellulose is used when viewing protists.

Without methylcellulose, it will be difficult to view organisms with fast movements under a microscope.

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Answer:

the faster, ... the higher

Answer:

d. consumers, heterotrophs

Explanation:

Answer:

d. consumers, heterotrophs

Explanation:

Humans cannot be producers since we do not make photosynthesis (our own energy/food), we need to consume food in order to have energy. Therefore, we can't be autotrophs. We are also not decomposers because we don't eat dead animals like for example a vulture.

The phenotype is affected by mutations 1 and 2 because in the first, the complete protein is altered, and in the second, the new amino acid may cause the protein to have altered or no function.

Mutations can happen naturally or as a result of UV rays, congenital conditions, ionic radiations, or specific free radicals.

Even with the point mutation, there is no alteration to the amino acid sequence, hence the protein will not be affected.

In mutation 1, a new nucleotide is added at codon 9, changing the whole sequence of amino acids and codons in the process,  mutation frameshift.

Because a new codon was created as a result of the substitution of one nucleotide by another in mutation 2, produced a new amino acid, so Point mutation.

Therefore, in mutation 3, one nucleotide is swapped out for another, and the resulting codon codes the same amino acid as the one before it, so point mutation.

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Answer:

Explanation:

d

A renewable resource is different from a nonrenewable one by the fact that a renewable resource is replenished faster than it is used. Thus, the correct option for this question is D.

A renewable resource may be defined as a type of resource that significantly continues to exist in nature despite being consumed or can replenish itself over a period of time even as they are utilized by the organisms.

Examples of renewable resources may include wind power, solar energy, geothermal energy, biomass, etc. These resources are available in nature in unlimited amounts as compared to non-renewable resources.

Therefore, a renewable resource is different from a nonrenewable one by the fact that a renewable resource is replenished faster than it is used. Thus, the correct option for this question is D.

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