Cell Biology Practice Questions
1. In a cell if acidity of Lysome is lost, then loss of:
(a) Phagocytosis of invading bacteria(b) Elevated phosphatase level
(c) Glycogen degradation
(d) No major effect
2. Bacterial genomes is prevented by its own endonucleases by-
(a) Methylation at restriction sites(b) Immune mechanism
(c) Nuclease resistant genome
(d) Are not much effective on bacterial genome
3. The function of macrophages is to-
(a) Enzyme Secretion(b) Engulf Cell organelles
(c) Engulf Foreign Material
(d) Kills Invading Bacteria
4. The difference which distinguish prokaryotic cell from eukaryotic is-
(a) ER (b) Mesosome(c) Nuclear Membrane (d) Plasma membrane
5. Extra nuclear genetic material is found-
(a) Ribosome (b) ER(c) Chloroplast (d) Centriole
6. The acrosome of the sperm is formed from the
(a) mitochondria (b) centrosome(c) lysomome (d) golgi bodies
7. Holiday junction is observed during:
(a) Mitosis (b) Interphase(c) Recombination (d) DNA Repair
8. A caretenoid less mutant plant was grown under normal sunlight then-
(a) Increased photosynthesis rate(b) Increased chlorophyll synthesis
(c) Reduced photorespiration
(d) Increased chlorophyll oxidation and necrosis
9. A C3 mustard plant was grown at 300 ppm of CO2 in 14 h light and 10 h dark cycles,it was transferred to 1000 ppm CO2. This will lead to (other environmental parameters remaining identical)-
(a) Increased photosynthesis(b) Decreased Photosynthesis
(c) Increase in Respiration
(d) No Change
10. Presence of AIDS virus cannot be detected by-
(a) ELISA (b) Western blotting(c) Northern Blot (d) Assay of full-length ds DNA
11. Which part of translational modification of proteins does not occur in lumen of ER-
(a) Glycosylation(b) Ubiquitnation
(c) Conformation folding & formation of quaternary structure
(d) Formation of Disulphide bonds
12. Freshly broken chromosome ends are sticky & tend to fuse, however ends of intact chromosomes are stable. Their stability is due to presence of-
(a) Centromeres(b) Telomeres
(c) Special membrane around chromosomes
(d) Kinetochores
13. Plant cell wall is generally made up of-
(a) Cellulose and pectin (b) Cellulose(c) Chitin (d) Murin
14. Which one of the following is correct for structure of cell wall of fungi and Bacteria?
(a) Both have glycopeptide(b) Both are made up of N-acetylglucasamine
(c) Both are made up of murin
(d) Both are made up of chitin
15. Nucleus is absent in-
(a) Sieve tube (b) cambium(c) Phloem parenchyma (d) None of these
16. Among the following which is true cell according cell theory-
(a) Virus (b) Monerans(c) Protestans (d) Bacteria
17. The characteristic property of metabolically active cell is-
(a) Low nucleo-cytoplasmic ratio(b) High nucleo-cytoplasmic ratio
(c) High volume to surface area ratio
(d) Small nucleus
18. Plasma membrane the functional as well as structural role is played by-
(a) Proteins (b) Lipids(c) Cholesterol (d) Oligosaccharides
19. Lipid nature of plasma membrane can be destroyed by-
(a) Hexane (b) Benzene(c) Chloroform (d) NaOH
20. The plasma membrane of intestine is highly folded into microvilli. The main function of Microvilli is-
(a) To Secrete digestive enzymes(b) To help in blood circulation
(c) To increase its absorptive surface
(d) For ageing of worn out cells
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