Question

Consider the following statements about proteins:
A. Proteins contain only Carbon, Hydrogen and Oxygen
B. Proteins are polymers of amino acids
C. Peptide bonds link amino acids
D. Primary structure determines protein function
E. Protein denaturation affects functional properties
Choose the correct answer from the options given below:

• A. A, B, C, D
• B. B, C, D, E
• C. C, D, E, A
• D. D, E, A, B

Hint:

Proteins always contain nitrogen. Remember: amino acids + peptide bonds.

Answer 1

The Correct Option is B

Concept: Proteins are complex biomolecules composed of amino acids and exhibit structural hierarchy that determines their function and properties.

Step 1: Evaluating Statement A.
Proteins contain:
• Carbon (C)
• Hydrogen (H)
• Oxygen (O)
• Nitrogen (N)
• Sometimes sulfur (S) Thus, statement A is incorrect because nitrogen is always present.

Step 2: Evaluating Statement B.
Proteins are long chains (polymers) of amino acids. Hence, this is correct.

Step 3: Evaluating Statement C.
Amino acids are linked by peptide bonds formed through condensation reactions. Hence, correct.

Step 4: Evaluating Statement D.
Primary structure (sequence of amino acids):
• Determines folding pattern
• Influences final 3D structure
• Ultimately affects function Thus, correct.

Step 5: Evaluating Statement E.
Denaturation:
• Alters protein structure
• Affects solubility, viscosity, gelation Hence, correct.

Step 6: Final selection.
Correct statements are: \[ B, C, D, E \] Final Conclusion:
Option (2) is correct.