Question

1. of the following elements, which is the most abundant, by weight, in living organisms?

marks : 1.00
c. nitrogen
b. carbon
d. hydrogen
a. phosphorus
e. sulfur

Explanation:

Carbon is a key - building block of organic molecules in living organisms and is the most abundant element by weight among the given options. It forms the backbone of many biological macromolecules like carbohydrates, lipids, proteins, and nucleic acids.

Answer:

B. Carbon