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Q. No.In a transcription unit, RNA polymerase binds to:
1.
Ori
2.
Promoter
3.
Operator
4.
Structural gene
Subtopic: Transcription: I |
85%
From NCERT
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The distance between a base pair in the DNA double helix is approximately:
| 1. | 2.0 nm | 2. | 0.34 nm |
| 3. | 20 nm | 4. | 3.4 nm |
Subtopic: DNA Double Helix |
84%
From NCERT
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Subtopic: Transcription |
93%
From NCERT
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In some viruses, the flow of genetic information is from RNA to DNA. These viruses are:
| 1. | Reverse transcriptases | 2. | Reoviruses |
| 3. | Ribozymes | 4. | Retroviruses |
Subtopic: DNA Double Helix |
64%
From NCERT
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What is added to the 5’ end of hnRNA in Eukaryotes?
| 1. | Poly A tail |
| 2. | Methyl cytosine triphosphate |
| 3. | Methyl guanosine triphosphate |
| 4. | Poly U tail |
Subtopic: Transcription: I |
85%
From NCERT
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Identify the incorrectly matched pair:
| Organism | Length of DNA | |
| 1. | Bacteriophage ϕ 174 | 5386 base pairs |
| 2. | Bacteriophage Lambda | 48502 base pairs |
| 3. | Escherichia coli | 4 × 106 base pairs |
| 4. | Human beings | 3.3 × 109 base pairs |
Subtopic: The DNA |
52%
From NCERT
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The process of RNA splicing shows the dominance of:
| 1. | DNA world | 2. | RNA world |
| 3. | Protein world | 4. | Microbial world |
Subtopic: Transcription |
93%
From NCERT
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At which position in the ribose is an additional –OH present [with respect to Deoxyribose]?
| 1. | 1’ | 2. | 2’ |
| 3. | 3’ | 4. | 5’ |
Subtopic: The DNA |
78%
From NCERT
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Watson and Crick based their model of DNA on X-ray diffraction data produced by:
1. Hershey and Chase
2. Marie Curie and Pierre Curie
3. Franklin and Wilkins
4. Meselson and Stahl
1. Hershey and Chase
2. Marie Curie and Pierre Curie
3. Franklin and Wilkins
4. Meselson and Stahl
Subtopic: DNA Double Helix |
88%
From NCERT
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In a transcription unit, with respect to structural genes, the promoter is located:
| 1. | Upstream and 5’ | 2. | Upstream and 3’ |
| 3. | Downstream and 5’ | 3. | Downstream and 3’ |
Subtopic: Transcription: I |
76%
From NCERT
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