Multiple Choice
Which enzyme is responsible for adding complementary nucleotides during DNA replication?
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14. DNA Synthesis
DNA Polymerases
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What is the primary function of DNA Polymerase III in prokaryotic cells?
A
To repair mismatched DNA bases
B
To synthesize new DNA strands by adding nucleotides to a primer
C
To unwind the DNA double helix during replication
D
To remove RNA primers and replace them with DNA
Verified step by step guidance1
Understand the role of DNA Polymerase III in prokaryotic cells: DNA Polymerase III is a crucial enzyme in the DNA replication process.
Recognize that DNA replication involves the synthesis of a new DNA strand complementary to the template strand.
Identify that DNA Polymerase III adds nucleotides to the 3' end of a pre-existing chain, which is usually an RNA primer laid down by primase.
Differentiate between the functions of various enzymes: DNA Polymerase I is responsible for removing RNA primers and replacing them with DNA, while helicase unwinds the DNA double helix.
Conclude that the primary function of DNA Polymerase III is to synthesize new DNA strands by adding nucleotides to a primer during DNA replication.
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