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. |
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 |
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. |
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 |
Which of the following acts as a ribozyme for peptide bond formation in bacteria?
1. | 5s rRNA | 2. | 23s rRNA |
3. | 16s rRNA | 4. | 5.1s rRNA |
In actual structure, tRNA is a compact molecule that looks like a/an:
1. | Cloverleaf | 2. | Railroad |
3. | Inverted L | 4. | Alpha helix |
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 |
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 |
Reverse transcriptase is a:
1. | DNA-dependent RNA polymerase |
2. | RNA-dependent DNA polymerase |
3. | RNA-dependent RNA polymerase |
4. | DNA-dependent DNA polymerase |
The density gradient in Meselson and Stahl's experiment was of:
1. | NH4Cl | 2. | CsCl |
3. | KCl | 4. | BaCl2 |