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NEET BIOLOGYEasy

One of the strands of double stranded DNA has base composition as follows: 15% A, 15% T, 40% G and 30% C. What will be the percentage of these bases in the complementary strand?

A

15% A, 15% T, 30% G, 40% C

B

15% A, 30% T, 40% G, 15% C

C

15% A, 15% T, 40% G, 30% C

D

15% A, 40% T, 15% G, 30% C

Step-by-Step Solution

According to the text, the two strands of DNA are complementary to each other due to specific base pairing: Adenine (A) pairs with Thymine (T), and Guanine (G) pairs with Cytosine (C) . Therefore, the percentage of bases in the complementary strand will be determined by the original strand:

  • 15% A in the original strand pairs with 15% T in the complementary strand.
  • 15% T in the original pairs with 15% A in the complementary.
  • 40% G in the original pairs with 40% C in the complementary.
  • 30% C in the original pairs with 30% G in the complementary. Thus, the complementary strand has 15% A, 15% T, 30% G, and 40% C .
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