NURSING ANM AND GNM

NURSING EXAM QUESTIONS

BIOCHEMISTRY

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Joining two adjacent amino acids is called
A
a peptide bond
B
a dehydration reaction
C
a covalent bond
D
all choices are correct
Explanation: 

Detailed explanation-1: -A peptide bond is formed by a dehydration synthesis or reaction at a molecular level. This reaction is also known as a condensation reaction which usually occurs between amino acids. As depicted in the figure given below, two amino acids bond together to form a peptide bond by the dehydration synthesis.

Detailed explanation-2: -A peptide bond is a chemical bond formed between two molecules when the carboxyl group of one molecule reacts with the amino group of the other molecule, releasing a molecule of water (H2O). This is a dehydration synthesis reaction (also known as a condensation reaction), and usually occurs between amino acids.

Detailed explanation-3: -The reaction between two amino acids is a condensation reaction. This is because a molecule is removed during this process. The OH is removed from the carboxylic acid group of one molecule and the H from the NH₂ group is removed on the other amino acid. These together form a H₂O molecule that is lost.

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