OBJECTIVE LIFE SCIENCE
MOLECULAR BIOLOGY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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peptide bonds
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ionic bonds
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hydrogen bonds
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covalent bonds
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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. Duplication of the genetic information occurs by the use of one DNA strand as a template for formation of a complementary strand.
Detailed explanation-2: -DNA is made up of two strands. Each strand has a backbone made up of alternating sugars and phosphate groups. The two strands are linked by complementary nitrogenous bases. The strands are oriented in opposite directions, making the structure “antiparallel".
Detailed explanation-3: -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.