Q. No.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?
(a) Circular structure
(b) Transferable
(c) Single-stranded
(d) Independent replication
Water soluble pigments found in plant cell vacuoles are
(1) chlorophylls
(2) carotenoids
(3) anthocyanins
(4) xanthophylls
A cell organelle containing hydrolytic enzyme is
(1) lysosome
(2) microsome
(3) ribosome
(4) mesosome
Select the mismatch.
1. Gas vacuoles — Green bacteria Cells
2. Large central vacuoles — Animal cells
3. Protists — Eukaryotes
4. Methanogens — Prokaryotes
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 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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