Q: 27. What’s hyperbaric oxygen therapy?
Sol. It is treatment involving the use of high partial pressure oxygen. It is employed in cases of carbon monoxide poisoning.
Q: 28. What is a cell biology?
Sol. Cell biology is that discipline of science, which deals with the study of structure, biochemistry, functions, reproduction, behaviour, genetics, and evolution of cell.
Q: 29. What are unicellular organisms?
Sol. Each unicellular organism consists of highly specialized cell capable of performing different activities of life and capable of independent survival e.g. Amoeba, Paramoecium, and Euglena.
Q: 30. What is cancer?
Sol. Cancer is defined as uncontrolled mitotic proliferation of cells due to loss of contact inhibition. It leads to the formation of abnormal growth (of a body part) which may be benign or malignant. The cancer cells are undifferentiated and actively dividing cells.
Q: 31. Can unicellular organisms get cancer?
Sol. No, as the only cell representing the unicellular organism must be fully differentiated while for cancer causation at least one cell must be undifferentiated to undergo uncontrolled mitotic proliferation. Thus, it is possible only in multicellular organisms.
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