MCQ practice · SSC Biology Board questions · Chapter 2: Cells and Tissues of Organisms
What is the main component of the chromosome?
Think it through first, then pick an option.
- a DNA
- b RNA
- c Gene
- d GMO
Answer and explanation
Correct answer: a DNA
The chromosome is made mainly of DNA and protein; DNA is the main component.
Why the other options are wrong
- b RNA: RNA is found in the nucleolus and is not the main component of the chromosome.
- c Gene: A gene is a part carried on the chromosome, not its component; this chapter says it is made of DNA and protein.
- d GMO: A GMO is a genetically modified organism, not a component of the chromosome.
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