Concept explainers
Introduction:
Answer to Problem 1A
Correct answer:
Deoxyribonucleotides are the building blocks of DNA; DNA polymerase is the enzyme that adds the
Explanation of Solution
Reason for correct statement:
Replication involves making of 2 copy of DNA from a single molecule of DNA. Polymerase is the enzyme responsible for
Option (c) is given as “DNA polymerase”.
As, “DNA polymerase is responsible for forming new copies of DNA by adding nucleotides and chemically connecting them to the growing chains of DNA molecule,” it is the right answer”.
Hence, option (c) is correct.
Reasons for incorrect statements:
Option (a) is given as “helicase”.
Helicase is responsible for opening the double helical structure of DNA for the process of replication. So, it is a wrong answer.
Option (b) is given as “RNA polymerase”.
RNA polymerase builds the primer for DNA polymerase that adds nucleotides during elongation. So, it is a wrong answer.
Option (d) is given as “DNA ligase”.
DNA ligase adds the phosphodiaster bonds, to join the Okazaki fragments on lagging strands and also helps in DNA repairing. So, it is a wrong answer.
Hence, options (a), (b), and (d) are incorrect.
DNA polymerase is responsible for adding new nucleotides to a growing DNA chain during DNA replication.
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Chapter 22 Solutions
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