Q. No.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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1. 5s rRNA
2. 23s rRNA
3. 16s rRNA
4. 5.1s rRNA
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In actual structure, tRNA is a compact molecule that looks like a/an:
| 1. | Cloverleaf | 2. | Railroad |
| 3. | Inverted L | 4. | Alpha helix |
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During DNA packaging in eukaryotic cells, Non-Histone Chromosomal proteins:
| 1. | Are not required |
| 2. | Are required from the beginning to the end of the packaging |
| 3. | Are required only for earlier stages of packaging |
| 4. | Are required for a higher level of packaging |
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Histones are:
| 1. | Positively charged and basic amino acids |
| 2. | Negatively charged and basic proteins |
| 3. | Positively charged and acidic proteins |
| 4. | Not found in bacteria |
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Reverse transcriptase is a:
| 1. | DNA-dependent RNA polymerase |
| 2. | RNA-dependent DNA polymerase |
| 3. | RNA-dependent RNA polymerase |
| 4. | DNA-dependent DNA polymerase |
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The density gradient in Meselson and Stahl's experiment was of:
| 1. | NH4Cl | 2. | CsCl |
| 3. | KCl | 4. | BaCl2 |
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