GENETICS AND EVOLUTION
MOLECULAR BASIS OF INHERITANCE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Only statement I is incorrect
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Only statement II is incorrect
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Both statement I and II are correct
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Both statement I and II are incorrect
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Detailed explanation-1: -The majority of prokaryotes have a single replication origin, yet the rate of replication is extremely high. In E. coli, replication occurs at a rate of 1000 nucleotides per second and takes 18 minutes to complete.
Detailed explanation-2: -Replication in prokaryotes starts from a sequence found on the chromosome called the origin of replication-the point at which the DNA opens up. Helicase opens up the DNA double helix, resulting in the formation of the replication fork.
Detailed explanation-3: -The only true statement is that prokaryotic DNA replication is faster than eukaryotic DNA replication.
Detailed explanation-4: -DNA replication begins at an origin of replication. There is only one origin in prokaryotes (in E. coli, oriC) and it is characterized by arrays of repeated sequences.