Question

How many amino acids are required to make proteins?

• A. 10
• B. 15
• C. 20
• D. 25

Hint:

Think of the standard set of building blocks that biology textbooks list for making every protein.

Answer 1

The Correct Option is C

Step 1: Understanding the Question.
The question asks how many different amino acids the body uses as building blocks to make proteins.

Step 2: Key Concept.
Proteins are long chains made by joining amino acids together in different orders and combinations. Biologists count 20 standard amino acids that living cells use to build all the proteins found in the body, from muscle fibers to enzymes.

Step 3: Checking each option.
(A) 10: This number is too low, it does not match the standard count of amino acids used in protein building.
(B) 15: This number is also short of the actual count recognized in biology.
(C) 20: This matches the well known set of 20 standard amino acids that cells combine to form every protein in the body.
(D) 25: This number is higher than the accepted count of standard amino acids.

Step 4: Final Answer.
20 amino acids are required to make proteins.