AP BIOLOGY

THE MOLECULAR BASIS OF INHERITANCE

DNA REPLICATION

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
DNA replication can happens at ____ site(s) in Eukaryotic cells but ____ site(s) in porkaryotic cells.
A
one, multiple
B
two, one
C
multiple, one
D
multiple, multiple
Explanation: 

Detailed explanation-1: -The DNA replicates before the cell division occurs. Both prokaryotic and eukaryotic DNA replicate in a semi-conservative manner. However, there are a few differences between the prokaryotic and eukaryotic DNA replication based on their size and complexity in genetic material.

Detailed explanation-2: -Eukaryotic DNA replication requires multiple replication forks, while prokaryotic replication uses a single origin to rapidly replicate the entire genome. DNA replication always occurs in the nucleus. Eukaryotic DNA replication involves more polymerases than prokaryotic replication.

Detailed explanation-3: -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-4: -In prokaryotic cells, there is only one point of origin, replication occurs in two opposing directions at the same time, and takes place in the cell cytoplasm. Eukaryotic cells on the other hand, have multiple points of origin, and use unidirectional replication within the nucleus of the cell.

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