OBJECTIVE LIFE SCIENCE
MOLECULAR BIOLOGY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Which 2 molecules form the sides (backbone) of the DNA ladder?
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deoxyribose sugar and adenine
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deoxyribose sugar and a hydrogen bond
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deoxyribose sugar and the nucleus
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deoxyribose sugar and phosphate
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Explanation:
Detailed explanation-1: -Each strand has a backbone made of alternating sugar (deoxyribose) and phosphate groups. Attached to each sugar is one of four bases–adenine (A), cytosine (C), guanine (G), or thymine (T).
Detailed explanation-2: -Under normal circumstances, the nitrogen-containing bases adenine (A) and thymine (T) pair together, and cytosine (C) and guanine (G) pair together. The binding of these base pairs forms the structure of DNA .
Detailed explanation-3: -The two strands are held together by hydrogen bonds between pairs of bases: adenine pairs with thymine, and cytosine pairs with guanine.
Detailed explanation-4: -alternating sugar and phosphate molecules form the sides or “backbone” of the DNA molecule.
There is 1 question to complete.