The total number of alpha amino acids is:
Correct answer: C. 22
- A. 19
- B. 27
- C. 22
- D. 25
- E. 28
Explanation
The correct answer is 22. This includes the 20 standard amino acids that are the building blocks of proteins, plus 2 special amino acids: selenocysteine and pyrrolysine, which are incorporated into proteins in specific circumstances. Options such as 19, 25, 27, and 28 either underestimate or overestimate this total, not accounting properly for these additional amino acids.
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About Carboxylic Acids
Carboxylic acids are named and studied through the combined effects of the carbonyl and hydroxyl groups, their preparation, acidity and hydrogen bonding. Reactions include neutralisation, esterification, reduction and conversion into acid chlorides, anhydrides, esters and amides, with emphasis on how these derivatives interconvert.
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550 free Carboxylic Acids MCQs from Chemistry, each with the correct answer and an explanation. Unlimited attempts, no account needed.
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