Which of the following would be nucleoside found only in RNA?

1. Thymidine 2. Cytidine
3. Uridine 4. Adenosine

Subtopic:  DNA vs RNA as Genetic Material |
 93%
From NCERT
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Which of the following acts as the substrate and provides energy for DNA replication?

1. Dideoxyribonucleoside triphospahtes
2. Ribonucleoside triphosphates
3. Deoxyribonucleoside triphospahtes
4. Deoxyribonucleotide triphosphates

Subtopic:  DNA Replication: I |
 62%
From NCERT
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Which of the following is not a stop codon?

1. UAA 2. UGA
3. UAC  4. UAG

Subtopic:  Genetic Code: I | Genetic Code: II | Genetic Code: III |
 89%
From NCERT
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A segment of DNA coding for a polypeptide is most accurately defined as:

1. Operon 2. Gene
3. Recon 4. Cistron
Subtopic:  Transcription |
 74%
From NCERT
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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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According to Erwin Chargaff, in a double-stranded DNA

1. The ratios between Adenine and Thymine, and, Guanine and Cytosine are constant and equal.
2. The ratios between Adenine and Thymine, and, Guanine and Cytosine are constant but are not equal to one.
3. The ratios between Adenine and Guanine, and, Thymine and Cytosine are constant and equal.
4. The ratios between Adenine and Guanine, and, Thymine and Cytosine are constant but are not equal to one.

Subtopic:  DNA Double Helix |
 73%
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The backbone of a polynucleotide chain is made of:

1. Sugar and nitrogenous bases
2. Phosphate and nitrogenous bases
3. Sugar and phosphate
4. Sugar, phosphate, and nitrogenous bases

Subtopic:  The DNA | DNA Double Helix |
 80%
From NCERT
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