Question:
A cereal protein which is soluble in 70 percent alcohol is:
A cereal protein which is soluble in 70 percent alcohol is:
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To remember: "Prolamine" starts with P (Proline-rich) and is found in cereals. It is the alcohol-soluble fraction of gluten.
Updated On: Jul 4, 2026
- Albumin
- Histones
- Meta proteins
- Prolamine
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The Correct Option is D
Solution and Explanation
Concept:
The Osborne classification divides proteins based on their solubility in different solvents.
• Albumins: Soluble in water.
• Globulins: Soluble in dilute salt solutions.
• Prolamines: Soluble in 70-80% aqueous alcohol.
• Glutelins: Soluble in dilute acids or bases.
Step 1: Analyzing Prolamines.
Prolamines are storage proteins found in the endosperm of cereal grains. They are characterized by high levels of proline and glutamine amino acids.
Step 2: Solubility characteristics.
Because of their hydrophobic nature, they do not dissolve in water. They are uniquely soluble in 70% ethyl alcohol.
Step 3: Examples and Conclusion.
Common examples include Gliadin (Wheat) and Zein (Maize). These are all categorized as Prolamines. Final Answer: (D)
• Albumins: Soluble in water.
• Globulins: Soluble in dilute salt solutions.
• Prolamines: Soluble in 70-80% aqueous alcohol.
• Glutelins: Soluble in dilute acids or bases.
Step 1: Analyzing Prolamines.
Prolamines are storage proteins found in the endosperm of cereal grains. They are characterized by high levels of proline and glutamine amino acids.
Step 2: Solubility characteristics.
Because of their hydrophobic nature, they do not dissolve in water. They are uniquely soluble in 70% ethyl alcohol.
Step 3: Examples and Conclusion.
Common examples include Gliadin (Wheat) and Zein (Maize). These are all categorized as Prolamines. Final Answer: (D)
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