Question

The additional 8% human genome sequenced account for _____ million new letters added to the existing sequenced DNA.

• A. 40
• B. 200
• C. 280
• D. 400

Hint:

The human genome consists of approximately 3 billion base pairs, and any additional sequencing contributes to the total number of base pairs in the genome.

Answer 1

The Correct Option is B

The human genome consists of approximately 3 billion base pairs. If 8% of the human genome is sequenced, we calculate the number of new letters added to the existing sequenced DNA by taking 8% of 3 billion: \[ \text{New letters} = 0.08 \times 3,000 \text{ million} = 240 \text{ million} \] Since the question asks for the number of million new letters added, the closest answer choice is \( 200 \) million. Therefore, the correct answer is \( \boxed{200} \).