Question:
Carbohydrates are
(A) Molecules that contain carbon, hydrogen and oxygen atoms in specific ratios.
(B) Sparing protein
(C) Produce energy
(D) Prevent lipid metabolism
Choose the correct answer from the options given below:
Carbohydrates are
(A) Molecules that contain carbon, hydrogen and oxygen atoms in specific ratios.
(B) Sparing protein
(C) Produce energy
(D) Prevent lipid metabolism
Choose the correct answer from the options given below:
(A) Molecules that contain carbon, hydrogen and oxygen atoms in specific ratios.
(B) Sparing protein
(C) Produce energy
(D) Prevent lipid metabolism
Choose the correct answer from the options given below:
Show Hint
Carbohydrates are the most abundant biomolecules on Earth, produced primarily through photosynthesis in plants.
Updated On: Jul 23, 2026
- (A), (B) and (D) only.
- (A), (B) and (C) only.
- (A), (B), (C) and (D).
- (B), (C) and (D) only.
Show Solution
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The Correct Option is B
Solution and Explanation
Step 1: Understanding the Concept:
Carbohydrates are organic compounds that serve as the primary source of energy for most living organisms.
They play key roles in nutrition, structural stability, and metabolic pathways.
Step 2: Detailed Explanation:
Let us evaluate each statement:
- Statement (A): Carbohydrates are organic molecules composed of carbon, hydrogen, and oxygen, typically in a $1:2:1$ ratio, with the general empirical formula $\text{C}_n(\text{H}_2\text{O})_m$. (True)
- Statement (B): They are "protein-sparing".
When the body has an adequate supply of carbohydrates for energy, it does not need to break down dietary or structural proteins for fuel. This allows proteins to be preserved for tissue growth and repair. (True)
- Statement (C): They produce energy.
The primary function of carbohydrates is to provide readily accessible energy, yielding approximately $4 \text{ kcal/g}$ upon oxidation. (True)
- Statement (D): Prevent lipid metabolism.
This is incorrect. While carbohydrates are metabolized first, they do not prevent lipid metabolism.
In fact, a baseline level of carbohydrate metabolism is required for complete lipid oxidation; without it, incomplete fat breakdown leads to ketosis.
Therefore, statements (A), (B), and (C) are correct.
Step 3: Final Answer:
The correct option is (A), (B), and (C) only, corresponding to option (B).
Carbohydrates are organic compounds that serve as the primary source of energy for most living organisms.
They play key roles in nutrition, structural stability, and metabolic pathways.
Step 2: Detailed Explanation:
Let us evaluate each statement:
- Statement (A): Carbohydrates are organic molecules composed of carbon, hydrogen, and oxygen, typically in a $1:2:1$ ratio, with the general empirical formula $\text{C}_n(\text{H}_2\text{O})_m$. (True)
- Statement (B): They are "protein-sparing".
When the body has an adequate supply of carbohydrates for energy, it does not need to break down dietary or structural proteins for fuel. This allows proteins to be preserved for tissue growth and repair. (True)
- Statement (C): They produce energy.
The primary function of carbohydrates is to provide readily accessible energy, yielding approximately $4 \text{ kcal/g}$ upon oxidation. (True)
- Statement (D): Prevent lipid metabolism.
This is incorrect. While carbohydrates are metabolized first, they do not prevent lipid metabolism.
In fact, a baseline level of carbohydrate metabolism is required for complete lipid oxidation; without it, incomplete fat breakdown leads to ketosis.
Therefore, statements (A), (B), and (C) are correct.
Step 3: Final Answer:
The correct option is (A), (B), and (C) only, corresponding to option (B).
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