BIOLOGY
NUCLEIC ACIDS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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contain ribose and deoxyribose in opposite strands.
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are held together by hydrogen bonds.
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are attached through a phosphate to hold the strands together.
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contain uracil but not thymine.
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Detailed explanation-1: -Each molecule of DNA is a double helix formed from two complementary strands of nucleotides held together by hydrogen bonds between G-C and A-T base pairs.
Detailed explanation-2: -The two strands are connected by chemical bonds between the bases: adenine bonds with thymine, and cytosine bonds with guanine.
Detailed explanation-3: -The DNA double helix is held together by hydrogen bonds between the bases attached to the two strands. The DNA double helix. The two sides are the sugar-phosphate backbones, composed of alternating phosphate groups and deoxyribose sugars. The nitrogenous bases face the center of the double helix.
Detailed explanation-4: -Answer and Explanation: The answer is B: hydrogen bonds are easier to break allowing for DNA copying. Hydrogen bonds formed between complementary base pairs on opposite DNA strands form the “rungs on a ladder” portion of DNA’s double-helical structure.