The Question is from neet-botany , and it was created by the author D VINOD

Question

Which unique feature of prokaryotic DNA replication allows for rapid cell division?

D VINOD · Accepted Answer

## CORE INFORMATION
✓ **Answer**: B
## CONCEPT FRAMEWORK
	**Primary Concept**: Prokaryotic DNA Replication
	**Related Topics**: Binary Fission, Cell Cycle, DNA Structure
	**Prerequisites**: Basic understanding of DNA replication and prokaryotic cell structure.
## SOLUTION PATHWAY
**Given Information**:
	The question asks about a feature that contributes to *rapid* cell division in prokaryotes.
**Method & Steps**:
	1. **Consider the characteristics of prokaryotic DNA**: Prokaryotic DNA is typically circular and located in the cytoplasm, unlike eukaryotic DNA which is linear and within a nucleus.
		Reasoning: This structural difference influences the replication process.
	2. **Focus on the origin of replication**: Prokaryotic DNA replication begins at a *single* origin of replication.
		Working: From this single origin, replication proceeds bidirectionally, creating two replication forks that move around the circular chromosome.
		Key Point:  A single origin simplifies and speeds up the replication process.
	3. **Relate replication speed to cell division**:  Faster DNA replication allows for a shorter cell cycle and thus more rapid cell division.
		Result: The single origin of replication is the key feature enabling rapid prokaryotic cell division.
		Verification:  This aligns with the fact that prokaryotes, like bacteria, can reproduce very quickly.
 ## OPTION ANALYSIS
[A] :x: Presence of introns: Introns are primarily found in eukaryotic genes, not prokaryotic. While they play a role in gene regulation in eukaryotes, they don't contribute to rapid cell division in prokaryotes.
[B] ✓: Single origin of replication: Having a single origin allows for rapid and efficient replication of the entire circular chromosome, enabling faster cell division.
[C] :x: Linear chromosomes: Prokaryotes have circular chromosomes, not linear ones. Linear chromosomes, typical of eukaryotes, have multiple origins of replication.
[D] :x: Multiple replication forks: While prokaryotic replication *does* involve two replication forks, these forks originate from the *single* origin.  The presence of two forks aids in rapid replication but isn't the primary factor; the single origin is the key.
 ## LEARNING AIDS
	**Common Mistakes**:
		1. Confusing prokaryotic and eukaryotic DNA characteristics: Remember the key differences – circular vs. linear chromosomes, single vs. multiple origins of replication.
		2. Focusing on replication forks without considering the origin:  While multiple forks speed up replication, they are a consequence of the single origin, which is the defining feature.
	**Quick Tips**:
		1. Associate 'single' and 'simple' with prokaryotes: Single, circular chromosome; single origin of replication; simpler cell structure overall.
		2. Visualize the replication process: Imagine the circular chromosome and the two forks moving outwards from the single origin, quickly replicating the entire DNA molecule.

D VINOD · Answer

Presence of introns

D VINOD · Answer

The correct Option is "Single origin of replication"

D VINOD · Answer

Linear chromosomes

D VINOD · Answer

Multiple replication forks

NEET Botany MCQs

Select Chapter

Question Tags

Question Tags

Question Tags

Question Tags

Question Tags

Question Tags

Question Tags

Question Tags

Question Tags

Question Tags

NEET Subjects

Our Bots

Company