AP BIOLOGY

HEREDITY

MUTATIONS

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

Which 2 molecules form the sides (backbone) of the DNA ladder?

A	deoxyribose sugar and adenine
B	deoxyribose sugar and a hydrogen bond
C	deoxyribose sugar and the nucleus
D	deoxyribose sugar and phosphate

Explanation:

Detailed explanation-1: -DNA consists of two strands that wind around each other like a twisted ladder. Each strand has a backbone made of alternating sugar (deoxyribose) and phosphate groups.

Detailed explanation-2: -Base Pair Attached to each sugar is one of four bases: adenine (A), cytosine (C), guanine (G) [GWA-NeeN] or thymine (T). The two strands are held together by hydrogen bonds between pairs of bases: adenine pairs with thymine, and cytosine pairs with guanine.

Detailed explanation-3: -The chemical backbones of the double helix are made up of sugar and phosphate molecules that are connected by chemical bonds, known as sugar-phosphate backbones. The two helical strands are connected through interactions between pairs of nucleotides, also called base pairs.

Detailed explanation-4: -The sides of the ladder are made of alternating sugar and phosphate molecules. The sugar is deoxyribose. The rungs of the ladder are pairs of 4 types of nitrogen bases.

There is 1 question to complete.