Question

What is the mRNA complementary strand for the following DNA strand: ACC GTT AAT

Answer 1

To determine the mRNA complementary strand for the given DNA strand, we first need to know that in RNA, the base thymine (T) is replaced by uracil (U). The complementary base pairing rules are as follows:

- A (adenine) pairs with U (uracil) in RNA.
- T (thymine) pairs with A (adenine).
- C (cytosine) pairs with G (guanine).
- G (guanine) pairs with C (cytosine).

Given the DNA strand: **ACC GTT AAT**, the complementary mRNA strand would be generated by replacing each DNA base with its complementary RNA base:

- A pairs with U
- C pairs with G
- C pairs with G
- G pairs with C
- T pairs with A
- T pairs with A
- A pairs with U
- T pairs with A

Now, let's write out the mRNA complementary strand:

- A → U
- C → G
- C → G
- G → C
- T → A
- T → A
- A → U
- T → A

So the mRNA complementary strand for the DNA strand **ACC GTT AAT** is:

**UGG CAA UUA**.