Length of DNA in E. coli is 
1. 2.2 m 
2. 1.36 mm 
3. 1.36 m
4. 3.4 m 

Subtopic:  The DNA |
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Dominance of RNA world is proved by 
1. Capping 
2. Splicing 
3. Polyadenylation 
4. All of these 
Subtopic:  Transcription |
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Which plant was used by Taylor to prove semiconservative replication at chromosomal level?
1. Haematoxylan 
2. Vicia faba
3. Trillium
4. Ophioglossum
Subtopic:  DNA Replication |
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During polymerisation of deoxyribonucleosides triphosphates in bacteria which of the following enzymes is mainly required? 
1. DNA dependent RNA polymerase
2. DNA dependent RNA polymerase
3. RNA dependent DNA polymerase
4. DNA gyrase 
Subtopic:  Transcription |
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In a DNA molecule adenine of one strand base pairs with ______ on the other strand
1. Guanine
2. Thymine
3. Cytosine
4. Both (1) & (2)
 
Subtopic:  DNA Double Helix |
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The genetic material of Tobacco mosaic virus is 
1. RNA 
2. DNA
3. Protein
4. NADPH
Subtopic:  DNA vs RNA as Genetic Material |
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DNA polymerases catalyse polymerisation of / in 
1. Ribonucleotides 
2. 5' → 3' direction
3. 3' → 5' direction 
4. Deoxyribonucleosides
Subtopic:  DNA Replication |
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In the 5' end of a DNA molecule
1. The fifth carbon of pyrimidine base is free
2. The fifth carbon of purine base is free
3. The fifth carbon of pentose sugar is free
4. Both (1) & (3)
Subtopic:  The DNA |
 66%
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In DNA, uracil is replaced by
1. Thymine 
2. Thiamine
3. Cytosine
4. Adenine
 
Subtopic:  The DNA |
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During DNA replication which of the following does not act as substrates?
1. dATP
2. dCTP
3. dUTP
4. dGTP
 65%
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