SSC Ecology And Environment Sample Paper NCERT Sample Paper-1

  • question_answer
    Ionizing radiations are more dangerous to

    A) Highly specialized cells

    B) Cells in which food is stored

    C) Mature stable cells

    D) Actively dividing cells

    Correct Answer: D

    Solution :

    In general, ionizing radiation is harmful and potentially lethal to living beings but can have health benefits in radiation therapy for the treatment of cancer and thyrotoxicosis. Most adverse health effects of radiation exposure may be grouped in two general categories; ? Deterministic effects (harmful tissue reactions) due in large part to the killing/ malfunction of cells following high doses; and ? Stochastic effects, i.e., cancer and heritable effects involving either cancer development in exposed individuals owing to mutation of somatic cells or heritable disease in their offspring owing to mutation of reproductive (germ) cells.


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