Sample Questions — The search for genetic material
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MCQ
Why was protein ruled out as genetic material in Avery’s experiment?
✅ Correct Answer: D
Destruction of protein did not stop transformation, indicating protein was not responsible.
MCQ
What is the function of protease in Avery’s experiment?
✅ Correct Answer: C
Protease was used to test if proteins were the transforming substance.
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MCQ
Who first demonstrated the phenomenon of transformation?
✅ Correct Answer: B
Griffith’s 1928 experiment on Streptococcus pneumoniae showed transformation.
MCQ
What method did Hershey and Chase use to prove DNA is genetic material?
✅ Correct Answer: D
Their experiments showed radioactive DNA entered bacteria, not protein, confirming DNA’s role.
MCQ
Why was radioactive sulfur (35S) used to label protein?
✅ Correct Answer: D
Sulfur is found in amino acids like methionine and cysteine.
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