The Question is from neet-botany biological-classification monera, and it was created by the author Mr. NARESH KUMAR K

Question

Chromosomes in a bacterial cell can be 1-3 in number and

Mr. NARESH KUMAR K · Accepted Answer

## CORE INFORMATION
✓ **Answer**: A
## CONCEPT FRAMEWORK
	**Primary Concept**: Bacterial Chromosome Structure and Number
	**Related Topics**: Plasmids, Bacterial Genetics, DNA Replication
	**Prerequisites**: Basic understanding of prokaryotic cell structure.
## SOLUTION PATHWAY
**Given Information**:
	The question asks about the possible number of chromosomes in a bacterial cell.
**Method & Steps**:
	1. Recall the typical bacterial chromosome structure.
		Reasoning: Bacteria usually have a single circular chromosome located in the nucleoid region. 
	2. Consider the presence of plasmids.
		Working: Bacteria can also contain smaller, circular DNA molecules called plasmids, which are separate from the main chromosome and replicate independently.  While plasmids carry genes that can confer advantages like antibiotic resistance, they are not considered essential chromosomal elements.
	3. Account for variations in chromosome number.
		Result: While a single circular chromosome is the norm, some bacteria can have multiple chromosomes (ranging from 1-3 or even more in rare cases) and these can be circular or linear.
		Verification: This information aligns with current understanding of bacterial genetics and diversity.
 ## OPTION ANALYSIS
[A] ✓: 'True': This is the correct answer.  While less common than a single chromosome, bacteria can indeed possess multiple chromosomes (1, 2, or 3, and sometimes even more). 
[B] :x: 'False': This is incorrect. The statement in the question is true.
[C] :x: 'Bacteria always have a single chromosome': This is incorrect. While most bacteria have a single chromosome, it's not universally true.
[D] :x: 'Bacteria only have linear chromosomes': This is incorrect. Most bacteria have circular chromosomes. While some bacteria have linear chromosomes, it is not the only type. 
 ## LEARNING AIDS
	**Common Mistakes**:
		1. Assuming all bacteria have a single chromosome: Remember that variations exist in chromosome number and structure among bacterial species.
		2. Confusing plasmids with chromosomes: Plasmids are extrachromosomal DNA elements, distinct from the main bacterial chromosome(s).
	**Quick Tips**:
		1.  Most bacteria have a single, circular chromosome, but exceptions exist.
		2.  Plasmids are not considered chromosomes, though they are important genetic elements in bacteria.

Mr. NARESH KUMAR K · Answer

The correct Option is "True"

Mr. NARESH KUMAR K · Answer

False

Mr. NARESH KUMAR K · Answer

Bacteria always have a single chromosome

Mr. NARESH KUMAR K · Answer

Bacteria only have linear chromosomes

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