Question:
Given below are two statements:
Statement I - In prokaryotes, there is only replicon however in eukaryotes, these are several replicons in tandem.
Statement II - Two separated strands in a replicon of DNA are prevented from re-joining by helicase enzyme.
In light of above statements, choose the correct answer from the option given below.
Given below are two statements:
Statement I - In prokaryotes, there is only replicon however in eukaryotes, these are several replicons in tandem.
Statement II - Two separated strands in a replicon of DNA are prevented from re-joining by helicase enzyme.
In light of above statements, choose the correct answer from the option given below.
Statement I - In prokaryotes, there is only replicon however in eukaryotes, these are several replicons in tandem.
Statement II - Two separated strands in a replicon of DNA are prevented from re-joining by helicase enzyme.
In light of above statements, choose the correct answer from the option given below.
Show Hint
Key roles:
Helicase = Unwinds DNA
SSB proteins = Prevent rejoining
SSB proteins = Prevent rejoining
Updated On: May 8, 2026
- Both statement I and statement II are correct.
- Both statement I and statement II are incorrect.
- Statement I is correct and statement II is incorrect.
- Statement I is incorrect and statement II is correct.
Show Solution
Verified By Collegedunia
The Correct Option is C
Solution and Explanation
Concept: DNA replication occurs at specific regions called replicons, each having an origin of replication.
• Replicon: Unit of DNA replication containing one origin.
• Prokaryotes: Usually have a single circular chromosome with one origin (single replicon).
• Eukaryotes: Have linear chromosomes with multiple origins (many replicons).
Step 1: Analyze Statement I.
Prokaryotes have a single replicon, while eukaryotes have multiple replicons arranged along DNA. Hence, Statement I is correct.
Step 2: Analyze Statement II.
Helicase unwinds DNA strands by breaking hydrogen bonds. However, the separated strands are prevented from rejoining by single-strand binding proteins (SSB proteins), not helicase. Hence, Statement II is incorrect.
Step 3: Conclusion.
Statement I is correct, Statement II is incorrect. Final Answer: Option (C)
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