Q. No.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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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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Hershey and Chase proved DNA as the genetic material in their experiment because :
| 1. | Bacteria that were infected with viruses that had radioactive proteins were not radioactive. |
| 2. | Bacteria that were infected with viruses that had radioactive DNA were radioactive. |
| 3. | Both 1 and 2 are correct. |
| 4. | Both 1 and 2 are incorrect. |
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DNA replication is correctly described as:
| 1. | Semi-conservative and Continuous |
| 2. | Semi-conservative and Discontinuous |
| 3. | Conservative and Continuous |
| 4. | Semi-conservative and Semi-discontinuous |
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According to Erwin Chargaff, in a double-stranded DNA
| 1. | The ratios between Adenine and Thymine, and, Guanine and Cytosine are constant and equal. |
| 2. | The ratios between Adenine and Thymine, and, Guanine and Cytosine are constant but are not equal to one. |
| 3. | The ratios between Adenine and Guanine, and, Thymine and Cytosine are constant and equal. |
| 4. | The ratios between Adenine and Guanine, and, Thymine and Cytosine are constant but are not equal to one. |
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The backbone of a polynucleotide chain is made of:
| 1. | Sugar and nitrogenous bases |
| 2. | Phosphate and nitrogenous bases |
| 3. | Sugar and phosphate |
| 4. | Sugar, phosphate, and nitrogenous bases |
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