<h3><u>Answer;</u></h3>
b). Activation of an upstream guanine nucleotide exchange factor
<h3><u>Explanation</u>;</h3>
- <em><u>When a ligand activates the G protein-coupled receptor, it induces a conformational change in the receptor that allows the receptor to function as a guanine nucleotide exchange factor (GEF) that exchanges GDP for GTPthus turning the G protein-coupled receptor on.</u></em>
- The activated G-protein then dissociates into an alpha (G-alpha) and a beta-gamma complex.
Answer:
RNA polymerase is an enzyme that is responsible for copying a DNA sequence into an RNA sequence, duyring the process of transcription.
<h3>stomach</h3><h3>because it releases hydrochloric acid and digests our food </h3>
<h3>hope it helped :-)</h3><h3>thank you</h3>
When you have tigers which in warmer climates are observed to have thinner coats and in colder climates are observed to have thicker coats this shows us the mechanism of adaptation and natural selection in play. Because they have a warmer climate around them they can hae a thinner coat and vice versa.