Q. No.
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In prokaryotes:
| 1. | A typical nucleus is not seen and DNA is scattered throughout the cell |
| 2. | A typical nucleus may sometimes be present and DNA is scattered throughout a cell |
| 3. | A typical nucleus is not seen but DNA is not scattered throughout the cell |
| 4. | A typical nucleus may sometimes be present but DNA is not scattered throughout the cell |
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Transcriptionally, active chromatin is termed as:
| 1. | Heterochromatin | 2. | Euchromatin |
| 3. | Prechromatin | 4. | Prochromatin |
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The protein synthesizing machinery of a cell has evolved around:
| 1. | DNA | 2. | RNA |
| 3. | Protein itself | 4. | Viroids |
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Viruses grown on radioactive sulfur contain:
| 1. | Radioactive proteins but not DNA |
| 2. | Radioactive DNA but not proteins |
| 3. | Radioactive proteins and DNA |
| 4. | Nonradioactive DNA and protein |
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In a strand of nucleic acid, two nucleotides are linked together by:
1. 3’ – 5’ phosphodiester bond
2. 5’ – 3’ phosphodiester bond
3. 2’ – 5’ phosphodiester bond
4. 3’ – 1’ phosphodiester bond
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The daughter DNA that was extracted from the culture one generation after the transfer from 15N to 14N medium had:
| 1. | Low density |
| 2. | Intermediate density |
| 3. | High density |
| 4. | One had low and another had high density |
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A failure in cell division after DNA replication results in:
| 1. | Point mutation | 2. | Aneuploidy |
| 3. | Polyploidy | 4. | Apoptosis |
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What is another name for thymine?
| 1. | 5 – bromouracil | 2. | 3 – bromouracil |
| 3. | 3 – methyl uracil | 4. | 5 – methyl uracil |
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Griffith’s transformation experiment in Streptococcus pneumoniae demonstrated that:
1. Heat-killed virulent bacteria failed to produce disease in mice
2. Live non-virulent bacteria failed to produce disease in mice
3. Heat-killed virulent bacteria transformed non-virulent bacteria into virulent form
4. Live virulent bacteria alone produced fatal infection in mice
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