Q6. In the Meselson and Stahl experiment, which isotope was used to label the original DNA strands?
- A. Carbon-14
- B. Sulfur-35
- C. Nitrogen-15
- D. Phosphorus-32
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Sign In FreeWhich scientist(s) used radioactively labeled sulfur and phosphorus to confirm that DNA is the genetic material?
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This page provides a free online MCQ test for NEET Biology preparation, focusing specifically on the chapter Molecular Basis of Inheritance. It contains 10 carefully selected multiple-choice questions (MCQs) designed to test your conceptual understanding and exam readiness.
Key concepts covered in this specific test include Scientist, Radioactively, Phosphorus, Material, Following, and Statements.
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Which scientist(s) used radioactively labeled sulfur and phosphorus to confirm that DNA is the genetic material?
Avery, MacLeod, and McCarty
Meselson and Stahl
Hershey and Chase
Beadle and Tatum
Which of the following statements about mutations is correct?
Mutations always lead to harmful effects.
Silent mutations do not change the amino acid sequence.
Mutations cannot be inherited.
Mutations are always caused by environmental factors.
Which of the following is incorrect about post-transcriptional modifications in eukaryotes?
Introns are removed by splicing.
A 5' cap is added to the mRNA.
A poly-A tail is added to mRNA.
Post-transcriptional modifications occur in the cytoplasm.
Which of the following is NOT a characteristic of the genetic code?
It is triplet in nature
It is ambiguous
It is nearly universal
It is degenerate
Which of the following statements about genetic code is incorrect?
The genetic code is universal.
Each codon codes for multiple amino acids.
The genetic code is triplet in nature.
The genetic code is non-overlapping.
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