BIOLOGY
PROTEINS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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amino groups attached to an alpha carbon
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asymmetric carbons.
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carboxyl groups attached to an alpha carbon
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side chains (R groups).
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Detailed explanation-1: -All amino acids have a central carbon that is attached to an amino group, a carboxyl group, and a hydrogen atom. The fourth position on the central carbon is the R-group. This group varies between the different amino acids and gives them different properties.
Detailed explanation-2: -Amino acids differ from each other with respect to their side chains, which are referred to as R groups. The R group for each of the amino acids will differ in structure, electrical charge, and polarity.
Detailed explanation-3: -The R groups have a variety of shapes, sizes, charges, and reactivities. This allows amino acids to be grouped according to the chemical properties of their side chains. For example, some amino acids have polar side chains that are soluble in water; examples include serine, threonine, and asparagine.
Detailed explanation-4: -The essential amino acids are histidine, isoleucine, leucine, lysine, methionine, phenylalanine, threonine, tryptophan, and valine. The nonessential amino acids are alanine, asparagine, aspartic acid, glutamic acid, and serine.