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Multiple Choice
The single-stranded ends of DNA molecules can be joined together by:
A
Restriction Endonucleases.
B
DNA ligase.
C
DNA polymerase.
D
Helicase.
E
Primase.
Verified step by step guidance
1
Understand the role of each enzyme listed in the options: Restriction Endonucleases, DNA ligase, DNA polymerase, Helicase, and Primase.
Restriction Endonucleases are enzymes that cut DNA at specific sequences, creating single-stranded ends, but they do not join DNA strands.
DNA ligase is an enzyme that facilitates the joining of DNA strands together by catalyzing the formation of a phosphodiester bond, which is essential for joining single-stranded ends of DNA molecules.
DNA polymerase is primarily involved in DNA synthesis, adding nucleotides to a growing DNA strand, but it does not join single-stranded ends.
Helicase unwinds the DNA double helix, and Primase synthesizes RNA primers; neither of these enzymes is involved in joining single-stranded DNA ends.