The central dogma of molecular biology was proposed by:

1. Francis Crick 2. James Watson
3. Rosalind Franklin 4. Erwin Chargaff

Subtopic:  DNA Double Helix |
 91%
From NCERT
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The unequivocal proof that DNA is the genetic material was provided by:

1. Avery, Macleod, and McCarty
2. Hershey and Chase
3. Meselson and Stahl
4. Watson and Crick

Subtopic:  Search for Genetic Material |
 86%
From NCERT
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Hershey and Chase proved DNA as the genetic material in their experiment because :

1. Bacteria that were infected with viruses that had radioactive proteins were not radioactive.
2. Bacteria that were infected with viruses that had radioactive DNA were radioactive.
3. Both 1 and 2 are correct.
4. Both 1 and 2 are incorrect.

Subtopic:  Search for Genetic Material |
From NCERT
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DNA replication is correctly described as:

1. Semi-conservative and Continuous
2. Semi-conservative and Discontinuous
3. Conservative and Continuous
4. Semi-conservative and Semi-discontinuous

Subtopic:  DNA Replication |
 58%
From NCERT
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Which of the following acts as a ribozyme for peptide bond formation in bacteria?

1. 5s rRNA 2. 23s rRNA
3. 16s rRNA 4. 5.1s rRNA
Subtopic:  Translation |
 89%
From NCERT
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Histones are:

1. Positively charged and basic amino acids
2. Negatively charged and basic proteins
3. Positively charged and acidic proteins
4. Not found in bacteria

Subtopic:  DNA Packaging |
From NCERT
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In eukaryotes RNA polymerase II transcribes:

1. mRNA 2. rRNA
3. tRNA 4. hnRNA

Subtopic:  Transcription: I |
 70%
From NCERT
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Which of the following anticodons will hybridize with the mRNA codon 5’ – AUG – 3’?

1. 5’ – UAC – 3’ 2. 5’ – TAC – 3’
3. 3’ – UAC – 5’ 4. 3’ – TAC – 5’
Subtopic:  Translation |
 72%
From NCERT
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Some amino acids are coded by more than one codon. Hence genetic code is:

1. Unambiguous 2. Non-specific
3. Degenerate 4. Universal

Subtopic:  Genetic Code |
 74%
From NCERT
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The length of DNA in a typical mammalian cell is approximately:

1.1.1 meter2.1.5 meter
3.2.2 meter4.3.3 meter

Subtopic:  DNA Packaging |
 91%
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