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To determine the complementary mRNA strand from the given DNA template (TTC AGC), we need to first find the complementary DNA strand and then convert that to mRNA.
1. The complementary DNA strand is created by pairing the bases:
- A pairs with T,
- T pairs with A,
- C pairs with G,
- G pairs with C.
So, for the given template strand (TTC AGC):
- T → A
- T → A
- C → G
- (space)
- A → U (in RNA)
- G → C
- C → G
Putting that together, we find that the complementary DNA strand is AAG TCG.
2. Now, when converting to mRNA, we replace thymine (T) with uracil (U):
- AAG TCG → AAG UCG
Thus, the complementary mRNA strand for the provided DNA template (TTC AGC) is **AAG UCG**.
The correct response is:
**AAG UCG**.