If a portion of a strand of DNA bases reads 5′ AGCTAGCGT 3′, what would the sequence of bases on the complementary strand read?
A.
3′ TCGATCGCA 5′
B.
3′ TCGUTCGCU 5′
C.
3′ AGCTAGCGT 5′
D.
5′ SucGAUCGCA 3′
The sequence of bases on the complementary strand for the given DNA strand would read:
A. 3′ TCGATCGCA 5′
Explanation:
In DNA, the complementary base pairing rules are:
Adenine (A) pairs with Thymine (T)
Cytosine (C) pairs with Guanine (G)
Given the original strand 5′ AGCTAGCGT 3′, the complementary strand is formed by pairing each base with its complement and reading in the opposite direction. So:
A (Adenine) pairs with T (Thymine)
G (Guanine) pairs with C (Cytosine)
C (Cytosine) pairs with G (Guanine)
T (Thymine) pairs with A (Adenine)
Thus, the complementary strand is read in the 3′ to 5′ direction as 3′ TCGATCGCA 5′.