Q. No.
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The discontinuously synthesized DNA fragments are later joined by:
| 1. | DNA helicase | 2. | Topoisomerase |
| 3. | DNA ligase | 4. | DNA polymerase |
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If E.coli was allowed to grow for 80 minutes after transfer from 15N to 14N medium, the number of hybrid density DNA molecules would be:
| 1. | 2 | 2. | 16 |
| 3. | 14 | 4. | 8 |
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In eukaryotes, the sequences that appear in mature or processed mRNA are called:
| 1. | Introns | 2. | Cistrons |
| 3. | Exons | 4. | Mutons |
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What radioactive isotope was used by Meselson and Stahl to label DNA in their experiment?
| 1. | 35S | 2. | 15N |
| 3. | 32P | 4. | None |
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Which of the following acts as the substrate and provides energy for DNA replication?
| 1. | Dideoxyribonucleoside triphospahtes |
| 2. | Ribonucleoside triphosphates |
| 3. | Deoxyribonucleoside triphospahtes |
| 4. | Deoxyribonucleotide triphosphates |
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To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.
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A segment of DNA coding for a polypeptide is most accurately defined as:
| 1. | Operon | 2. | Gene |
| 3. | Recon | 4. | Cistron |
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The central dogma of molecular biology was proposed by:
| 1. | Francis Crick | 2. | James Watson |
| 3. | Rosalind Franklin | 4. | Erwin Chargaff |
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The unequivocal proof that DNA is the genetic material was provided by:
| 1. | Avery, Macleod, and McCarty |
| 2. | Hershey and Chase |
| 3. | Meselson and Stahl |
| 4. | Watson and Crick |
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