Home Biology Ecosystem Nutrient Cycling and Ecosystem Services (NIS) What percentage of the dry weight of an orga…
Biology Ecosystem Nutrient Cycling and Ecosystem Services (NIS) Single Correct MCQ
Published on: August 11, 2026

What percentage of the dry weight of an organism does carbon constitute?

A
70%
B
50%
C
49%
D
95%

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Text Solution

Verified by Experts
The correct answer is:
B

Carbon makes up about 50% of the dry weight of an organism.

This is because organic compounds like carbohydrates, proteins, lipids, and nucleic acids are all carbon-based. Other major elements include oxygen, hydrogen, nitrogen, phosphorus, and sulphur, but carbon is the dominant fraction.

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