Q. No.To form a nucleoside, a nitrogenous base is linked to a pentose sugar:
1.
Through a P-Glycosidic linkage at carbon atom number 1
2.
Through a P-Glycosidic linkage at carbon atom number 5
3.
Through an N-Glycosidic linkage at carbon atom number 1
4.
Through an N-Glycosidic linkage at carbon atom number 5
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Nucleosomes constitute the repeating subunits of a structure in the nucleus called:
| 1. | Nucleoid | 2. | Chromatid |
| 3. | Solenoid | 4. | Chromatin |
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Which of the following is true for both transcription and DNA replication?
| 1. | The principle of complementarity governs the processes |
| 2. | Only if the two strands act as a template |
| 3. | Only a segment of both strands is involved |
| 4. | Adenine base pairs with thymine |
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The structure of the ribosome is made of:
| 1. | rRNA and Proteins |
| 2. | rRNA and Polysaccharides |
| 3. | mRNA, rRNA and tRNA |
| 4. | RNA, DNA and Proteins |
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A molecule that can act as a genetic material must fulfil all the following criteria except:
| 1. | It should be able to generate its replica |
| 2. | It should chemically and structurally be stable |
| 3. | It should provide scope for rapid mutations |
| 4. | It should be able to express itself in the form of “Mendelian Characters” |
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What defines a coding and a template strand in the transcription unit?
| 1. | Structural gene | 2. | Ori |
| 3. | Terminator | 4. | Promoter |
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The DNA dependent polymerases catalyze:
| 1. | Only in 3’ – 5’ direction |
| 2. | Only in 5’ – 3’ direction |
| 3. | In both directions |
| 4. | In neither directions |
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DNA is structurally and chemically more stable than RNA because of the following except:
| 1. | It has thymine instead of uracil |
| 2. | 2’ –OH is absent in DNA |
| 3. | It replicates itself based on complementary base pairing |
| 4. | It does not have any catalytic role |
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Who proposed a semi-conservative mode of replication for DNA?
| 1. | Watson and Crick | 2. | Meselson and Stahl |
| 3. | Hershey and Chase | 4. | Beadle and Tatum |
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