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A DNA strand has the sequence ATCGGC. Which is the complementary strand of DNA?

A. UAGCCG
B. GCTAAT
C. TAGCCG
D. UGTCCT

Sagot :

GinnyAnswer
To determine the complementary strand of a given DNA sequence, we must pair each base in the original strand with its complementary base. DNA bases pair specifically as follows:

- Adenine (A) pairs with Thymine (T)
- Thymine (T) pairs with Adenine (A)
- Cytosine (C) pairs with Guanine (G)
- Guanine (G) pairs with Cytosine (C)

Given the original DNA sequence: ATCGGC, let's identify the complementary base for each base in the sequence:

1. The first base is A (Adenine), so its complement is T (Thymine).
2. The second base is T (Thymine), so its complement is A (Adenine).
3. The third base is C (Cytosine), so its complement is G (Guanine).
4. The fourth base is G (Guanine), so its complement is C (Cytosine).
5. The fifth base is G (Guanine), so its complement is C (Cytosine).
6. The sixth base is C (Cytosine), so its complement is G (Guanine).

Putting all these together, the complementary strand of DNA is:

TAGCCG

Therefore, the correct option is:

O TAGCCG
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