Nucleic acids are polymers of:
1. | Nucleosides | 2. | Nucleotides |
3. | Amino acids | 4. | Polypeptides |
In prokaryotes:
1. | A typical nucleus is not seen and DNA is scattered throughout the cell |
2. | A typical nucleus may sometimes be present and DNA is scattered throughout a cell |
3. | A typical nucleus is not seen but DNA is not scattered throughout the cell |
4. | A typical nucleus may sometimes be present but DNA is not scattered throughout the cell |
Transcriptionally, active chromatin is termed as:
1. | Heterochromatin | 2. | Euchromatin |
3. | Prechromatin | 4. | Prochromatin |
The protein synthesizing machinery of a cell has evolved around:
1. | DNA | 2. | RNA |
3. | Protein itself | 4. | Viroids |
Viruses grown on radioactive sulfur contain:
1. | Radioactive proteins but not DNA |
2. | Radioactive DNA but not proteins |
3. | Radioactive proteins and DNA |
4. | Nonradioactive DNA and protein |
In a strand of nucleic acid, two nucleotides are linked together by:
1. 3’ – 5’ phosphodiester bond
2. 5’ – 3’ phosphodiester bond
3. 2’ – 5’ phosphodiester bond
4. 3’ – 1’ phosphodiester bond
The daughter DNA that was extracted from the culture one generation after the transfer from 15N to 14N medium had:
1. | Low density |
2. | Intermediate density |
3. | High density |
4. | One had low and another had high density |
A failure in cell division after DNA replication results in:
1. | Point mutation | 2. | Aneuploidy |
3. | Polyploidy | 4. | Apoptosis |
What is another name for thymine?
1. | 5 – bromouracil | 2. | 3 – bromouracil |
3. | 3 – methyl uracil | 4. | 5 – methyl uracil |
In Griffith's experiment, which of the following bacterial strains was capable of causing pneumonia in mice?
1. | Live R |
2. | Bacteria strain with polysaccharide coat |
3. | Heat Killed S |
4. | Live R with capsule and Heat Killed S |