Chapter 5
Cellular Processes
Exercises:
1. Give a comparative account of the following
(a) Apoptosis and necrosis
(b) Autocrine and paracrine signaling
(c) Anabolic and catabolic pathways
(d) Totipotent and pluripotent cells
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2. Explain how stem cells are different from blood cells in terms of potency?
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3. How many mitotic divisions will produce 64 cells out of a single cell?
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4. During cell division, assembly of mitotic spindle can be prevented by administration of a drug called colchicine. Which stage of mitosis is most likely to be affected by this drug?
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5. Match the following
6. How is cell migration important for the development of an embryo?
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7. What is the significance of citric acid cycle?
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8. The first reaction in glycolysis is catalysed by which of the following enzymes:
(a) Glucokinase
(b) Phosphoglycerate kinase
(c) Phosphofructokinase
(d) Hexokinase
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9. Which of the following statements regarding cell signaling is NOT true?
(a) In endocrine signaling, the ligand reaches the target cell through bloodstream after being synthesised in the extracellular space.
(b) Synaptic signaling is an example of paracrine signaling.
(c) Ligands bind to receptors in a non-specific manner.
(d) Cancer cells exhibit autocrine signaling.
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10. Dark reaction in photosynthesis is named so because—
(a) It occurs independent of light energy
(b) It occurs in dark
(c) It cannot occur in daylight
(d) All of the above
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11. Differentiate between cyclic and non-cyclic photophosphorylation.
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12. Briefly describe Calvin cycle.
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