Single correct option
Consider the following statements:
1. The cell wall of plant cells is made of chitin.
2. Chloroplasts contain their own DNA and ribosomes.
Which of the statements given above is/are correct?
1. The cell wall of plant cells is made of chitin.
2. Chloroplasts contain their own DNA and ribosomes.
Which of the statements given above is/are correct?
- A. 1 only
- B. 2 only
- C. Both 1 and 2
- D. Neither 1 nor 2
Show answer and solution
Answer: (B) 2 only
The plant cell wall is made mainly of cellulose, whereas chitin forms the cell wall of fungi and the exoskeleton of insects, so statement 1 is wrong. Chloroplasts and mitochondria hold their own circular DNA and ribosomes, which supports the view that they arose from ancient bacteria; statement 2 is correct.
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