Question

Two plants whose DNA has been sequenced are

• A. Rice and Wheat
• B. Wheat and Maize
• C. Maize and Barley
• D. Rice and Arabidopsis

Hint:

The textbook names rice and Arabidopsis as the plants whose genomes were sequenced.

Answer 1

The Correct Option is D

Step 1: Recall the sequencing projects:
After the Human Genome Project, the genomes of several model organisms were sequenced.
In plants, the NCERT text names Arabidopsis thaliana (a small model plant) and rice (Oryza sativa).

Step 2: Pick the matching option:
Option (D) lists exactly these two plants, rice and Arabidopsis.

Step 3: Why the others do not fit:
(A), (B) and (C) combine wheat, maize or barley, which are not the plants named in the textbook list of sequenced genomes.
These cereals have large and complex genomes, so they were sequenced much later than rice and Arabidopsis.

Final Answer:
Rice and Arabidopsis are the two plants named.
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