Question

Match the LIST-I with LIST-II

LIST-I Type of Proteins	LIST-II  Examples
A. Structural proteins	IV. Collagen
B. Transport Proteins	I. Ion Channels
C. Hormonal Proteins	II. Insulin
D. Storage Proteins	III. Seed Proteins

Choose the correct answer from the options given below:

• A. A-I, B - II, C - III, D - IV
• B. A-II, B-III, C - I, D - IV
• C. A-IV, B - I, C - II, D - III
• D. A-III, B - IV, C - I, D - II

Hint:

When tackling matching questions, start with the pairs you are most confident about. Most students know that Insulin is a hormone (C-II) and Collagen is structural (A-IV). This combination (A-IV, C-II) is only found in option (C), allowing you to solve the question quickly.

Answer 1

The Correct Option is C

Step 1: Concept Overview:
This question tests your understanding of protein functional classes and their corresponding examples.
Step 2: Detailed Solution:
We need to match each protein type with the appropriate example:

A. Structural proteins: These provide support and shape to cells and tissues. Collagen, the most abundant mammalian protein, is a key component of connective tissues (skin, tendons, bones). Therefore, A corresponds to IV.
B. Transport Proteins: These facilitate substance movement across cell membranes or within the body. Ion Channels, transmembrane proteins forming pores for ion passage, are a prime example. Hemoglobin (oxygen transport) is another. Thus, B corresponds to I.
C. Hormonal Proteins: These are chemical messengers regulating physiological processes. Insulin, a protein hormone, regulates blood glucose. Hence, C corresponds to II.
D. Storage Proteins: These serve as amino acid and nutrient reserves. Seed Proteins (albumin, globulin in legume and cereal seeds) store amino acids for embryo development during germination. Ovalbumin (egg white) is another case. Thus, D corresponds to III.
Step 3: Conclusion:
The correct matching is A-IV, B-I, C-II, D-III, which aligns with option (C).