Q. No.The discontinuously synthesized DNA fragments are later joined by:
1.
DNA helicase
2.
Topoisomerase
3.
DNA ligase
4.
DNA polymerase
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Which of the following RNAs plays both structural and catalytic roles?
| 1. | mRNA | 2. | tRNA |
| 3. | rRNA | 4. | miRNA |
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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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1. 35S
2. 15N
3. 32P
4. None
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Sickle cell anemia is caused by:
| 1. | Chromosomal aberration | 2. | Point mutation |
| 3. | Non-disjunction event | 4. | An arthropod vector |
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Whose cell free system finally helped the genetic code to be deciphered?
| 1. | Gamow | 2. | Severo Ochoa |
| 3. | Hargobind Khorana | 4. | Marshall Nirenberg |
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Which of the following would be nucleoside found only in RNA?
| 1. | Thymidine | 2. | Cytidine |
| 3. | Uridine | 4. | Adenosine |
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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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