NURSING ANM AND GNM

NURSING EXAM QUESTIONS

BIOCHEMISTRY

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Examples of amino acids with acid side chains.
A
Glutamic acid
B
Aspartic acid
C
Both
D
None of the above
Explanation: 

Detailed explanation-1: -Two amino acids have acidic side chains at neutral pH. These are aspartic acid or aspartate (Asp) and glutamic acid or glutamate (Glu).

Detailed explanation-2: -Cysteine (Cys/C) is the only amino acid with a sulfhydryl group in its side chain.

Detailed explanation-3: -There are basically four different classes of amino acids determined by different side chains: (1) non-polar and neutral, (2) polar and neutral, (3) acidic and polar, (4) basic and polar.

Detailed explanation-4: -Side chains which have pure hydrocarbon alkyl groups (alkane branches) or aromatic (benzene rings) are non-polar. Examples include valine, alanine, leucine, isoleucine, phenylalanine. The number of alkyl groups also influences the polarity. The more alkyl groups present, the more non-polar the amino acid will be.

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