Answer:
b. the 20 amino acids found in proteins differ in the composition of their R groups, which may be either polar or charged.
Explanation:
Since the proteins are polymers joined by a big number of amino acids, all the joins occur the same way because in all the amino acids there is always one part that is exactly the same in all of them.
The rest of the molecule in the amino acids, the R group, is different in each one, that is the characteristic of each one, and this is the part that can give the name and some other chemical properties.
The function of the plasma membrane is to only allow certain items through, while blocking the rest.
Answer:
ATP
Explanation:
atp is the main source of energy for many cellular processes including muscle contraction and cell division.
<span>It </span>contains no additional gases<span>, </span>minerals<span>, or </span>contaminants<span>. ... </span>Would<span> it be </span>right<span> to </span>give<span> a </span>person<span> an </span>IV<span> (</span>intravenous<span>) </span>therapy<span> of </span>distilled water<span>? </span>Yes<span>. </span>Distilled water<span> is </span>pure<span> and </span>will cause no harm<span>. </span>Yes<span>. The </span>IV will<span> be </span>isotonic<span> </span>
