AP BIOLOGY

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THE MOLECULAR BASIS OF INHERITANCE

STRUCTURE OF NUCLEIC ACIDS

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
If one strand of DNA has the sequence G-C-C-A-T-A, the sequence of bases on the complementary DNA strand will be ____
A
A-T-T-G-C-G
B
C-G-G-U-A-U
C
G-C-C-A-T-A
D
C-G-G-T-A-T
Explanation: 

Detailed explanation-1: -In the complementary sequence, Adenine (A) is always paired with Thymine (T), and Cytosine (C) is always paired with Guanine (G).

Detailed explanation-2: -The base pairs on one strand of the DNA bind with the base pairs of the other strand specifically. A always pairs with T with two hydrogen bonds and G always pairs with C with three hydrogen bonds. So if one strand is ATGCTTGA then the complementary strand will be TACGAACT.

Detailed explanation-3: -The bases of one strand bond to the bases of the second strand with hydrogen bonds. Adenine always bonds with thymine, and cytosine always bonds with guanine. The bonding causes the two strands to spiral around each other in a shape called a double helix. Ribonucleic acid (RNA) is a second nucleic acid found in cells.

Detailed explanation-4: -The correct option is C The complementary DNA strand of the sequence ATGC will be TACG.

There is 1 question to complete.
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