PATHOLOGY MCQ
GENETICS AND DISEASE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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(3.1) During the process of replication, a molecule of DNA unzips, forming two single strands. What makes up each individual strand of DNA?
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paired adenine and uracil bases
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paired thymine and guanine bases
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sugar groups attached to individual amino acids
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nitrogenous bases attached to a sugar-phosphate backbone
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Explanation:
Detailed explanation-1: -DNA replication occurs through the help of several enzymes. These enzymes “unzip” DNA molecules by breaking the hydrogen bonds that hold the two strands together. Each strand then serves as a template for a new complementary strand to be created. Complementary bases attach to one another (A-T and C-G).
Detailed explanation-2: -Helicases are enzymes that bind and may even remodel nucleic acid or nucleic acid protein complexes. There are DNA and RNA helicases. DNA helicases are essential during DNA replication because they separate double-stranded DNA into single strands allowing each strand to be copied.
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