Question:
Which of the following are proteins?
A. Globulins
B. Albumins
C. Histones
D. Proteases
Choose the correct answer from the options given below:
Which of the following are proteins?
A. Globulins
B. Albumins
C. Histones
D. Proteases
Choose the correct answer from the options given below:
A. Globulins
B. Albumins
C. Histones
D. Proteases
Choose the correct answer from the options given below:
Show Hint
Simple proteins are classified based on solubility:
- Albumins (soluble in water)
- Globulins (soluble in salt solutions)
- Histones (basic proteins soluble in acid)
- Albumins (soluble in water)
- Globulins (soluble in salt solutions)
- Histones (basic proteins soluble in acid)
Updated On: Aug 5, 2026
- A, B and D only
- B, C and D only
- A, C and D only
- A, B, and C only
Show Solution
Verified By Collegedunia
The Correct Option is D
Solution and Explanation
Step 1: Understanding the Concept:
Proteins are complex macromolecules composed of amino acid chains linked by peptide bonds.
In biochemistry, proteins are classified based on their solubility, structure, and functional roles in biological systems.
Step 2: Detailed Explanation:
Let us evaluate each option based on its biochemical classification:
- A. Globulins: These are a major class of simple, globular proteins that are insoluble in pure water but soluble in dilute salt solutions (e.g., serum globulin, immunoglobulins).
- B. Albumins: These are simple, water-soluble globular proteins that can be coagulated by heat (e.g., egg albumin, serum albumin).
- C. Histones: These are highly basic, simple proteins rich in lysine and arginine residues. They associate with eukaryotic DNA to package it into nucleosomes.
- D. Proteases: Proteases are enzymes that catalyze the hydrolysis of peptide bonds in proteins (proteolysis).
While all enzymes (including proteases) are made of proteins, "protease" is a functional enzyme category rather than a structural class of simple proteins like albumins, globulins, and histones.
In classical biochemical classification, Albumins, Globulins, and Histones are grouped together as major classes of simple proteins.
Therefore, A, B, and C represents the correct structural grouping.
Step 3: Final Answer:
Globulins, Albumins, and Histones are classified as structural proteins, corresponding to Option (D).
Proteins are complex macromolecules composed of amino acid chains linked by peptide bonds.
In biochemistry, proteins are classified based on their solubility, structure, and functional roles in biological systems.
Step 2: Detailed Explanation:
Let us evaluate each option based on its biochemical classification:
- A. Globulins: These are a major class of simple, globular proteins that are insoluble in pure water but soluble in dilute salt solutions (e.g., serum globulin, immunoglobulins).
- B. Albumins: These are simple, water-soluble globular proteins that can be coagulated by heat (e.g., egg albumin, serum albumin).
- C. Histones: These are highly basic, simple proteins rich in lysine and arginine residues. They associate with eukaryotic DNA to package it into nucleosomes.
- D. Proteases: Proteases are enzymes that catalyze the hydrolysis of peptide bonds in proteins (proteolysis).
While all enzymes (including proteases) are made of proteins, "protease" is a functional enzyme category rather than a structural class of simple proteins like albumins, globulins, and histones.
In classical biochemical classification, Albumins, Globulins, and Histones are grouped together as major classes of simple proteins.
Therefore, A, B, and C represents the correct structural grouping.
Step 3: Final Answer:
Globulins, Albumins, and Histones are classified as structural proteins, corresponding to Option (D).
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