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Q. No.Consider the following two statements:
A:
The genetic code is degenerate.
B:
The genetic code is ambiguous.
1. Only A is correct.
2. Only B is correct.
3. Both A and B are correct.
4. Both A and B are incorrect.
Subtopic: Genetic Code |
69%
Level 2: 60%+
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Consider the following two statements:
DNA is a better molecule for storage of genetic information than RNA because
1. Only A is correct.
2. Only B is correct.
3. Both A and B are correct.
4. Both A and B are incorrect.
DNA is a better molecule for storage of genetic information than RNA because
| A: | DNA is capable of making its own replica, while RNA cannot make its own replica. |
| B: | DNA is structurally more stable and chemically more inert than RNA. |
1. Only A is correct.
2. Only B is correct.
3. Both A and B are correct.
4. Both A and B are incorrect.
Subtopic: DNA vs RNA as Genetic Material |
67%
Level 2: 60%+
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Which of the following experiments in molecular biology unequivocally showed that DNA is the genetic material in bacteriophages?
1. Meselson-Stahl experiment
2. Hershey-Chase experiment
3. Delbrück-Luria experiment
4. Beadle-Tatum experiment
1. Meselson-Stahl experiment
2. Hershey-Chase experiment
3. Delbrück-Luria experiment
4. Beadle-Tatum experiment
Subtopic: Search for Genetic Material |
91%
Level 1: 80%+
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Which subunit of the RNA polymerase holoenzyme allows it to initiate the process of transcription?
| 1. | Rho | 2. | Sigma |
| 3. | Omega | 4. | Epsilon |
Subtopic: Transcription |
88%
Level 1: 80%+
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In a tRNA molecule, the attachment site for an amino acid is located:
1. At its 3' end
2. At its 5' end
3. In the anticodon loop
4. In the DHU loop
1. At its 3' end
2. At its 5' end
3. In the anticodon loop
4. In the DHU loop
Subtopic: Genetic Code |
60%
Level 2: 60%+
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When chromatin is observed under electron microscope, which of the following appears as ‘beads on string’ structure?
1. Nucleosome
2. Solenoid
3. Filament
4. Supercoiled filament
1. Nucleosome
2. Solenoid
3. Filament
4. Supercoiled filament
Subtopic: DNA Packaging |
95%
Level 1: 80%+
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Which of the following, if used in Avery, Macleod and McCarty experiment, will affect transformation?
1. RNase
2. DNase
3. Protease
4. Lipase
1. RNase
2. DNase
3. Protease
4. Lipase
Subtopic: Search for Genetic Material |
92%
Level 1: 80%+
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Which enzyme joins Okazaki fragments on the lagging strand during DNA replication?
1. DNA Polymerase II
2. Topoisomerase
3. DNA Ligase
4. Holoenzyme
1. DNA Polymerase II
2. Topoisomerase
3. DNA Ligase
4. Holoenzyme
Subtopic: DNA Replication |
93%
Level 1: 80%+
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How many of the given functions can be performed by RNA?
1. 2
2. 3
3. 4
4. 5
| A: | Messenger |
| B: | Structural role |
| C: | Adaptor molecule |
| D: | Catalytic role |
| E: | Genetic material in some viruses |
1. 2
2. 3
3. 4
4. 5
Subtopic: The DNA | Translation | DNA Fingerprinting |
86%
Level 1: 80%+
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In the flow of genetic information, according to the central dogma of molecular biology, which molecule acts as an adapter molecule between transcription and translation?
1. mRNA
2. rRNA
3. tRNA
4. miRNA
1. mRNA
2. rRNA
3. tRNA
4. miRNA
Subtopic: Transcription |
85%
Level 1: 80%+
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