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. BacillusSelect 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.