MHT CET · BIOLOGY · STD 12 - 4. Molecular Basis of Inheritance

Which of the following statements is NOT true for Hershey and Chase experiment performed for confirmation of genetic material?

A They worked with bacteriophages and E. coli bacteria.
B They used radioactive elements like phosphorous \({ }^{35} P\) and sulfur \({ }^{32} S\).
C Only radioactive phosphorus was found inside the infected E. coli cells.
D Their experiment proved that DNA is the genetic material.

Verified Solution

Answer & Solution

Correct Answer

(B) They used radioactive elements like phosphorous \({ }^{35} P\) and sulfur \({ }^{32} S\).

Step-by-step Solution

Detailed explanation

Radioactive phosphorus \({ }^{32} \mathrm{P}\) and sulplıur \({ }^{35} \mathrm{S}\) was used in Hershey and Chase experiment.

Apply the relevant identity from the chapter and substitute the values established in the previous step, keeping the original constraint in view.

Use the simplified expression to isolate the unknown, then plug the result back into the question setup to confirm the working is internally consistent.

Cross-check against a boundary or limiting case. Both the dimensional balance and the qualitative behaviour at the extreme should agree with the candidate answer.

Combine the steps above to identify the correct option. The remaining choices each fail at least one of the consistency, dimensional, or boundary checks.

Same subject

Select the CORRECT match :

	I		II		III
i.	Monocyte	a.	Large round nucleus	l.	Antihista-mine property
ii.	Lymphocyte	b.	Twisted nucleus	m.	Release heparin
iii.	Basophil	c.	Bilobed nucleus	n.	Phagocytic
iv.	Eosinophil	d.	Kidney shaped nucleus	o.	Produce antibodies

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