Given below are two statements : Statement (I) : On hydrolysis, oligo peptides give rise to fewer number of α-amino acids while proteins give rise to a large number of β-amino acids. Statement (II) : Natural proteins are denatured by acids which convert the water soluble form of fibrous proteins to their water insoluble form. In the light of the above statements, choose the most appropriate answer from the options given below :

Both Statement I and Statement II are incorrect

Statement I is incorrect but Statement II is correct

Both Statement I and Statement II are correct

Statement I is correct but Statement II is incorrect

Biomolecules PYQ — JEE Main 2025 · 7 Apr · Shift 2 · Q3 with Solution

View written solutionFree

Correct answer: B

Analyze Statement (I)

Statement (I): On hydrolysis, oligo peptides give rise to fewer number of $\alpha$ -amino acids while proteins give rise to a large number of $\beta$ -amino acids.
- Oligopeptides are short chains of amino acids, so on hydrolysis they do give a small number of amino acids.
- Proteins are long polypeptide chains, so on hydrolysis they give a large number of amino acids.
- However, natural proteins are made up of $\alpha$ -amino acids, not $\beta$ -amino acids.
Therefore, Statement (I) is incorrect because of the phrase " $\beta$ -amino acids".
Analyze Statement (II)

Statement (II): Natural proteins are denatured by acids which convert the water soluble form of fibrous proteins to their water insoluble form.
- Denaturation of proteins can indeed be caused by acids, bases, heat, alcohol, etc.
- But the statement about conversion of water soluble form of fibrous proteins to their water insoluble form is wrong.
- In general:
  - Globular proteins are usually water soluble.
  - Fibrous proteins are generally water insoluble.
- Denaturation typically converts globular proteins into insoluble forms; it does not describe fibrous proteins as water soluble.
Therefore, Statement (II) is also incorrect.
Choose the correct option
- Statement (I): Incorrect
- Statement (II): Incorrect
Hence, the correct option is:

$\boxed{\text{B}}$
Comparison with stored correct answer
- Derived answer: $\text{B}$
- Stored correct answer: $\text{B}$
These match.

View written solutionFree

Correct answer: B

Analyze Statement (I)

Statement (I): On hydrolysis, oligo peptides give rise to fewer number of $\alpha$ -amino acids while proteins give rise to a large number of $\beta$ -amino acids.
- Oligopeptides are short chains of amino acids, so on hydrolysis they do give a small number of amino acids.
- Proteins are long polypeptide chains, so on hydrolysis they give a large number of amino acids.
- However, natural proteins are made up of $\alpha$ -amino acids, not $\beta$ -amino acids.
Therefore, Statement (I) is incorrect because of the phrase " $\beta$ -amino acids".
Analyze Statement (II)

Statement (II): Natural proteins are denatured by acids which convert the water soluble form of fibrous proteins to their water insoluble form.
- Denaturation of proteins can indeed be caused by acids, bases, heat, alcohol, etc.
- But the statement about conversion of water soluble form of fibrous proteins to their water insoluble form is wrong.
- In general:
  - Globular proteins are usually water soluble.
  - Fibrous proteins are generally water insoluble.
- Denaturation typically converts globular proteins into insoluble forms; it does not describe fibrous proteins as water soluble.
Therefore, Statement (II) is also incorrect.
Choose the correct option
- Statement (I): Incorrect
- Statement (II): Incorrect
Hence, the correct option is:

$\boxed{\text{B}}$
Comparison with stored correct answer
- Derived answer: $\text{B}$
- Stored correct answer: $\text{B}$
These match.