Question

Eukaryotes differ from prokaryotes in the mechanism of DNA replication due to [BHU 1994]
A) Different enzymes (instead of same enzyme) for synthesis of lagging and leading strands
B) Discontinuous rather than semidiscontinuous replication
C) Use of DNA primers rather than RNA primers
D) Unidirectional rather than bidirectional replication

Answer 1

Eukaryotes differ from prokaryotes in the mechanism of DNA replication due to
➡️ Unidirectional rather than bidirectional replication

Answer 2

Answer:

B) Discontinuous rather than semi discontinuous replication

Explanation:

• Eukaryotes and prokaryotes are different in the mechanism of DNA replication.

• While prokaryotic DNA has a single point of origin eukaryotes have multiple points of origin.

• While the prokaryotic DNA is seen in the cytoplasm, the eukaryotic DNA is packed inside the nucleus of the cell.

• While replication in eukaryotes is discontinuous. DNA is synthesized by the enzyme DNA pol. in the 5'→3' direction i.e. in the direction of the leading strand, replication in prokaryotes is semi discontinuous. Both strands are copied in the 5'→3' direction simultaneously with no need for discontinuous replication.

Hence Option B) Discontinuous rather than semi discontinuous replication is correct.