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

Question

In his bacteriophage experiments, Hershey and Chase demonstrated that DNA is genetic material in

D VINOD · Accepted Answer

## CORE INFORMATION
✓ **Answer**: C
## CONCEPT FRAMEWORK
	**Primary Concept**: Hershey-Chase Experiment
	**Related Topics**: DNA as Genetic Material, Bacteriophages, Radioactive Isotopes
	**Prerequisites**: Basic understanding of DNA, viruses, and experimental design.
## SOLUTION PATHWAY
**Given Information**:
	The question asks about the organism used by Hershey and Chase to demonstrate that DNA is the genetic material.
**Method & Steps**:
	1. Recall the Hershey-Chase experiment: Hershey and Chase used bacteriophages (viruses that infect bacteria) to demonstrate that DNA, not protein, is the genetic material.
		Reasoning: They used radioactive isotopes to label the DNA and protein components of the bacteriophages separately.
	2. Identify the specific bacteriophage used:  They used the T2 bacteriophage.
		Working: They labeled the DNA with radioactive phosphorus (32P) and the protein coat with radioactive sulfur (35S).
		Key Point:  Phosphorus is found in DNA but not in proteins, while sulfur is found in proteins but not in DNA.
	3. Understand the experimental results: After allowing the bacteriophages to infect bacteria, they found that the radioactive phosphorus (32P) was present inside the bacterial cells, while the radioactive sulfur (35S) remained outside. This indicated that DNA, not protein, had entered the bacteria and was responsible for carrying the genetic information.
		Result: This experiment provided strong evidence that DNA is the genetic material.
		Verification:  The results clearly showed that the genetic material passed from the bacteriophage to the bacteria was DNA.
## OPTION ANALYSIS
[A] :x: TMV (Tobacco Mosaic Virus) is a plant virus, not used in the Hershey-Chase experiment.
[B] :x: *Escherichia coli* is the bacterium that T2 bacteriophage infects, not the virus itself.
[C] ✓: T2 bacteriophage is the correct organism used in the Hershey-Chase experiment.
[D] :x: *Diplococcus pneumoniae* was used by Griffith in his transformation experiments, which also provided evidence for DNA as genetic material, but this is not the organism used by Hershey and Chase.
## LEARNING AIDS
	**Common Mistakes**:
		1. Confusing the organism used in the Hershey-Chase experiment with other organisms used in related experiments (e.g., *Diplococcus pneumoniae* used by Griffith).
			How to avoid: Carefully review the specifics of each experiment.
		2. Forgetting the specific bacteriophage used (T2).
			How to avoid: Remember 'T2' as the phage that 'too'k the credit for proving DNA as genetic material.
	**Quick Tips**:
		1. Remember 'P' for Phosphorus in DNA and 'S' for Sulfur in proteins.
		2. Visualize the experiment: radioactive DNA entering the bacteria, while radioactive protein coats remain outside.

D VINOD · Answer

TMV

D VINOD · Answer

$Escherichia{\rm{ }}coli$

D VINOD · Answer

The correct Option is "${T_2}$ bacteriophage"

D VINOD · Answer

$Diplococcus{\rm{ }}pneumoniae$

NEET Botany MCQs

Select Chapter

Question Tags

Question Tags

Question Tags

Question Tags

Question Tags

Question Tags

Question Tags

NEET Subjects

Our Bots

Company