Question

A single strand of DNA contains the following nine nucleotides in this order: ACT TAT GGA. What sequence of bases will be present on the complementary strand of DNA?
Responses
A UGA AUA CCTUGA AUA CCT
B ACT TAT GGAACT TAT GGA
C ACU UAU GGAACU UAU GGA
D TGA ATA CCT

Answer 1

To determine the complementary strand of DNA for the given sequence "ACT TAT GGA", we need to remember that in DNA, adenine (A) pairs with thymine (T), and cytosine (C) pairs with guanine (G).

Given the sequence:
- A pairs with T
- C pairs with G
- T pairs with A
- T pairs with A
- A pairs with T
- T pairs with A
- G pairs with C
- G pairs with C
- A pairs with T

So, when pairing the bases in the given sequence "ACT TAT GGA", the complementary bases will be as follows:

- A (A) -> T (T)
- C (C) -> G (G)
- T (T) -> A (A)
- T (T) -> A (A)
- A (A) -> T (T)
- T (T) -> A (A)
- G (G) -> C (C)
- G (G) -> C (C)
- A (A) -> T (T)

Putting them together, the complementary strand will read:
TGA ATA CCT

Therefore, the correct answer is:
**D. TGA ATA CCT**