Q. No.Which among the following are the smallest living cells, known without a definite cell wall, pathogenic to plants as well as animals and can survive without oxygen?
1. Bacillus
2. Pseudomonas
3. Mycoplasma
4. Nostoc
Select the mismatch.
| 1. | Gas vacuoles — Green bacteria Cells |
| 2. | Large central vacuoles — Animal cells |
| 3. | Protists — Eukaryotes |
| 4. | Methanogens — Prokaryotes |
A cell organelle containing hydrolytic enzyme is
1. lysosome
2. microsome
3. ribosome
4. mesosome
Microtubules are the constituents of
| 1. | spindle fibres, centrioles and cilia |
| 2. | centrioles, spindle fibres and chromatin |
| 3. | centrosome, nucleosome and centrioles |
| 4. | cilia, flagella and peroxisomes |
A complex of ribosomes attached to a single strand of RNA is known as
1. polymer
2. polypeptide
3. okazaki fragment
4. polysome
Which of the following is not a feature of the plasmids?
1. Circular structure
2. Transferable
3. Single-stranded
4. Independent replication
Water soluble pigments found in plant cell vacuoles are
1. chlorophylls
2. carotenoids
3. anthocyanins
4. xanthophylls
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. |
2. Formation of secretory vesicles
3. Respiration in bacteria
4. Activation of amino acid
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