AP BIOLOGY

THE MOLECULAR BASIS OF INHERITANCE

DNA MAKES RNA MAKES PROTEIN

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Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]

Suppose you can read the sequence of bases on only one strand of the double helix. What would you use to figure out the sequence on the other strand?

A	central dogma
B	x-ray crystallography
C	Chargaff’s rules
D	base pairing rules

Explanation:

Detailed explanation-1: -Base Pair The two strands are held together by hydrogen bonds between pairs of bases: adenine pairs with thymine, and cytosine pairs with guanine.

Detailed explanation-2: -Solution : (c) Adenine always pairs with thymine and cytosine always pairs with guanine. Thus, sequence of bases on complementary strand would be TACGTACGT.

Detailed explanation-3: -The four bases in DNA are adenine (A), cytosine (C), guanine (G), and thymine (T). These bases form specific pairs (A with T, and G with C).

Detailed explanation-4: -The bases are nearly perpendicular to the helix axis, and adjacent bases are separated by 3.4 . The helical structure repeats every 34, so there are 10 bases (= 34 per repeat/3.4 per base) per turn of helix.

There is 1 question to complete.