BIOMOLECULES AND ENZYMES

BIOLOGY

PROTEINS

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
How many different R groups are commonly found in living organisms? (ie how many different Amino Acids are there)
A
5
B
10
C
15
D
20
Explanation: 

Detailed explanation-1: -Amino acids typically are classified as standard or nonstandard, based on the polarity, or distribution of electric charge, of the R group (side chain). The 20 (or 21) amino acids that function as building blocks of proteins are classified as standard.

Detailed explanation-2: -Each of the 20 amino acids has a specific side chain, known as an R group, that is also attached to the carbon. 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.

Detailed explanation-3: -There are basically 20 standard amino acids having different structures in their side chains(R groups) .

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.

Detailed explanation-5: -There are a total of twenty-one amino acids, all of which are responsible for different roles throughout the body. Each amino acid is a large block of proteins, all different shapes, and sizes. In fact, some amino acid strands form together to create larger shaped proteins.

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