The Question is from neet-botany cell-biology , and it was created by the author NISHANTH

Question

Which of the following is NOT a characteristic feature exclusively found in prokaryotic 70S ribosomes?

NISHANTH · Accepted Answer

## CORE INFORMATION
✓ **Answer**: [C]
## CONCEPT FRAMEWORK
	**Primary Concept**: Ribosome structure and function
	**Related Topics**: Prokaryotic vs. Eukaryotic ribosomes, RNA components, Antibiotic sensitivity
	**Prerequisites**: Understanding of ribosome composition and differences between prokaryotic and eukaryotic cells.
## SOLUTION PATHWAY
**Given Information**:
		- Prokaryotic ribosomes are termed 70S, consisting of a small subunit (30S) and a large subunit (50S).
		- The small subunit contains 16S rRNA, while the large subunit contains 23S and 5S rRNA.
		- Eukaryotic ribosomes are 80S and have a 40S small subunit (with 18S rRNA) and a 60S large subunit (with 28S, 5.8S, and 5S rRNA).
**Method & Steps**:
	1.	Identify the components of prokaryotic ribosomes.
		Reasoning: Prokaryotic ribosomes have unique rRNA components.
		Formula/Rule: None applicable.
	2.	Compare the components with eukaryotic ribosomes.
		Working: 70S ribosomes contain 16S rRNA in the small subunit and 23S and 5S rRNA in the large subunit.
		Key Point: Eukaryotic ribosomes contain 28S rRNA, which is absent in prokaryotes.
	3.	Determine which option does not belong to prokaryotic ribosomes.
		Result: The presence of 28S rRNA is exclusive to eukaryotic ribosomes.
		Verification: Only option C refers to a characteristic exclusive to eukaryotic ribosomes.
## OPTION ANALYSIS
[A] :x: Option A refers to the presence of 16S rRNA, which is a characteristic of prokaryotic ribosomes.
[B] :x: Option B discusses sensitivity to streptomycin, which is a characteristic of prokaryotic ribosomes.
[C] ✓: Option C refers to the presence of 28S rRNA, which is not found in prokaryotic ribosomes.
[D] :x: Option D describes the sedimentation coefficient of 70S, which is indeed a characteristic of prokaryotic ribosomes.
## LEARNING AIDS
	**Common Mistakes**:
		1. Confusing prokaryotic and eukaryotic ribosomal RNA components: Always remember that prokaryotes have 16S and eukaryotes have 18S and 28S.
		2. Misunderstanding the concept of antibiotic sensitivity: Remember that certain antibiotics target specific ribosomal structures.
	**Quick Tips**:
		1. Use mnemonics to remember the rRNA components of prokaryotic versus eukaryotic ribosomes.
		2. Visual aids comparing the structures of prokaryotic and eukaryotic ribosomes can help solidify understanding.

NISHANTH · Answer

Presence of 16S rRNA in the small subunit

NISHANTH · Answer

Sensitivity to antibiotics like streptomycin

NISHANTH · Answer

The correct Option is "Presence of 28S rRNA"

NISHANTH · Answer

Sedimentation coefficient of 70S

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