Select the wrong statement:
1. | Bacterial cell wall is made up of peptidoglycan |
2. | Pili and fimbriae are mainly involved in the motility of bacterial cells |
3. | Cyanobacteria lack flagellated cells |
4. | Mycoplasma is a wall-less microorganism |
1. Larger nucleoli are present in dividing cells.
2. It is a membrane-bound structure.
3. It takes part in spindle formation.
4. It is a site for active ribosomal RNA synthesis.
Which of the following components provides sticky character to the bacterial cell?
1. Nuclear membrane
2. Plasma membrane
3. Glycocalyx
4. Cell Wall
Column I | Column II | |
1. | Lampbrush | Diplotene bivalents chromosomes |
2. | Allosomes | Sex chromosomes |
3. | Submetacentric | L-shaped chromosomes |
4. | Polytene | Oocytes of amphibians chromosomes |
Which of the following cell organelles is responsible for extracting energy from carbohydrates to form ATP?
1. Ribosome
2. Chloroplast
3. Mitochondrion
4. Lysosome
I: | semi-autonomous organelles. |
II: | formed by the division of pre-existing organelles and they contain DNA but lack protein-synthesizing machinery. |