Question

What is the mRNA complementary strand for the following DNA strand:

ACC GTT AAT

(1 point)
Responses

ACC GTT AAT
ACC GTT AAT

CAA UGG CCG
CAA UGG CCG

UGG CAA UUA
UGG CAA UUA

TGG CAA TTA

Answer 1

To determine the mRNA complementary strand for the given DNA strand (ACC GTT AAT), we need to remember the base pairing rules. In DNA, adenine (A) pairs with thymine (T), and cytosine (C) pairs with guanine (G). When transcribing DNA to mRNA, adenine (A) pairs with uracil (U) instead of thymine (T).

The DNA strand you provided is:

**DNA**: ACC GTT AAT

To find the complementary mRNA strand, we will replace each DNA base with its RNA complement:

- A (in DNA) pairs with U (in RNA)
- T pairs with A
- C pairs with G
- G pairs with C

Now, we can replace each base:

- A -> U
- C -> G
- C -> G
- G -> C
- T -> A
- T -> A
- A -> U
- A -> U
- T -> A

Putting it all together for the provided DNA sequence:

1. A (1st position) - U
2. C (2nd position) - G
3. C (3rd position) - G
4. G (4th position) - C
5. T (5th position) - A
6. T (6th position) - A
7. A (7th position) - U
8. A (8th position) - U
9. T (9th position) - A

This leads to the mRNA strand:

**mRNA**: UGG CAA UUA

Thus, the correct response is:

**UGG CAA UUA**