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Q. No.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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Which of the following best describes the specificity of the genetic code?
| 1. | The genetic code is universal; codons specify the same amino acids in all organisms. |
| 2. | The genetic code varies significantly among different organisms. |
| 3. | Each amino acid is specified by only one codon. |
| 4. | The genetic code is ambiguous, with one codon coding for multiple amino acids. |
Subtopic: Genetic Code |
81%
Level 1: 80%+
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Which of the following is not a property of genetic material?
| 1. | It must be able to replicate. |
| 2. | It must be dynamic, changing rapidly in response to environmental conditions. |
| 3. | It must be able to express itself in the form of phenotypic traits. |
| 4. | It must be able to undergo mutation. |
Subtopic: DNA vs RNA as Genetic Material |
86%
Level 1: 80%+
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