Cell is the fundamental structural and functional unit of all living organisms. This statement can be best justified by the fact that:
1. | The cells contain nucleic acids that contain genetic information |
2. | A large number of organelles present in the cell perform various functions |
3. | Anything less than a complete structure of a cell does not ensure independent living |
4. | All multi-cellular organisms begin their life as a single celled zygote |
Which of the following statements can explain the fact that many scientists do not consider viruses as living organisms?
1. | Metabolism and growth are defining properties of living organisms. |
2. | Anything less than a complete structure of a cell does not ensure independent living. |
3. | All cells arise from pre-existing cells. |
4. | All biochemical reactions are catalyzed by enzymes. |
I: | independent existence |
II: | division |
III: | performing the essential functions of life |
The famous aphorism ‘omniscellula-e-cellula’ was added to the cell theory in 1855 by
1. | Matthias Shcleiden | 2. | Theodore Schwann |
3. | J. B. S. Haldane | 4. | Rudolph Virchow |
The genomic DNA of a bacterial cell is:
1. circular and located on a single chromosome
2. circular and located on multiple chromosomes
3. linear and located on a single chromosome
4. linear and located on multiple chromosomes