OBJECTIVE LIFE SCIENCE
MOLECULAR BIOLOGY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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What does DNA polymerase do?
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connects sugars and phosphates with weak hydrogen bonds
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connects sugars and phosphates with strong covalent bonds
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connects bases with strong hydrogen bonds
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connects bases with strong covalent bonds
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Explanation:
Detailed explanation-1: -DNA polymerase causes covalent bonds to be made between deoxyribonucleotides.
Detailed explanation-2: -When nucleotides are incorporated into DNA, adjacent nucleotides are linked by a phosphodiester bond: a covalent bond is formed between the 5’ phosphate group of one nucleotide and the 3’-OH group of another (see below). In this manner, each strand of DNA has a “backbone” of phosphate-sugar-phosphate-sugar-phosphate.
Detailed explanation-3: -Explanation: DNA ligase joins the sugar-phosphate backbone of DNA strands through catalyzing the formation of phosphodiester bonds.
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