Question

Two statements, one Assertion and the other Reason are given. Choose the right option.
Assertion : Insulin is called a protein whereas Glycyl alanine is not called a protein
Reason : A polypeptide with amino acid residue less than 100 can also be called a protein if it has a well-defined conformation of a protein.

• A. Assertion is correct but Reason is incorrect
• B. Both Assertion and Reason are incorrect
• C. Both Assertion and Reason are correct
• D. Assertion is incorrect but Reason is correct

Hint:

Proteins are not defined only by size but also by their structure and biological functionSmall peptides without defined structure are not classified as proteins.

Answer 1

The Correct Option is C

Step 1: Understand the Assertion.
Insulin is a hormone made up of polypeptide chains and has a well-defined three-dimensional structure, so it is classified as a protein.
Glycyl alanine is a dipeptide (only two amino acids linked together) and does not possess a complex structure, hence it is not considered a protein.
Thus, the Assertion is correct.

Step 2: Analyze the Reason.
Generally, proteins consist of more than 100 amino acids. However, even smaller polypeptides can be considered proteins if they have a definite and stable three-dimensional conformation and biological function.
Thus, the Reason is also correct.

Step 3: Relation between Assertion and Reason.
The Reason correctly explains why insulin qualifies as a protein while glycyl alanine does not.

Step 4: Conclusion.
Both Assertion and Reason are correct.
Therefore:
\[ \boxed{\text{Both Assertion and Reason are correct}} \]