Answer:
They are opened either by the binding of ligands or by changes in electric potential across the membrane
Explanation:
Ion channels are the integral membrane proteins that form pores or holes for the transport of specific ions, such as potassium ions (K+), Na+, etc. Most ion channels are selective and allow only a single type of ion to pass through. These ion channels facilitate the diffusion of ions down the concentration gradient and do not require ATP.
Ion channels are mostly gated. Some ion channels open in response to change in the concentration of ions and electric charges across the membrane. Some ion channels open and close in response to the binding of specific molecules called a ligand. For example, binding of two molecules of acetylcholine to the receptor on the motor endplate of a neuromuscular junction opens an ion channel in the ACh receptor through which Na+ can flow across the membrane.
D. Stigma is the correct answer I believe.
Answer:
D) is the correct answer in my opinion
The tumor DNA sample of valerie have fewer bands than the peripheral blood because her tumor profile signifies a digest where equally alleles are mutated bring about in a pattern which is a subset of that got from the peripheral blood and her blood is heterozygous for the mutation but the tumor has a homozygous mutant genotype.
The correct answer is DNA ligase.
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DNA ligase<span> can be described as a DNA-joining enzyme. It has a possibility to link two pieces of DNA if they have the matching ends, using ATP as an energy source. As a result, unbroken molecule of DNA is formed.</span> It is used in recombinant DNA experiments, for example,<span> to insert genes and other pieces of DNA into plasmids.</span></span>
