Question

Choose the correct statements: A) The first amino acid in a protein chain is in the left end and termed as C-terminal amino acids. B) Long protein chain folded upon itself like a hollow woolen ball is called tertiary structure. C) In general, only right handed helices are observed in protein. D) In general, polysaccharides will have glycosidic bond formed by dehydration.

• A. A, B and C
• B. B, C and D
• C. A, C and D
• D. A, B and D

Hint:

N for First (Left), C for Last (Right).

Answer 1

The Correct Option is B

Step 1: The task.
Pick the correct statements about proteins and polysaccharides.

Step 2: Statement A.
A says the first amino acid at the left end is the C-terminal. This is wrong. The left end of a protein chain is the N-terminal, and the right end is the C-terminal. So A is incorrect.

Step 3: Statement B.
B says a long folded protein chain like a hollow wool ball is the tertiary structure. This is correct, the tertiary structure is the overall folded 3D shape. So B is correct.

Step 4: Statement C.
C says proteins generally show only right handed helices. This is true for the common alpha helix. So C is correct.

Step 5: Statement D.
D says polysaccharides form glycosidic bonds by dehydration, that is, by removing water. This is correct. So D is right.

Step 6: Conclusion.
The correct statements are B, C and D. Therefore the correct answer is "B, C and D". \[ \\boxed{\\text{B, C, D}} \]