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NEET2026BiologyChapterActual

Read the following statements carefully: (I) Normal cells show a property called contact inhibition by virtue of which contact with other cells inhibits their uncontrolled growth. (II) Computed tomography uses strong magnetic fields and non-ionizing radiations to accurately detect pathological and physiological changes in the living tissue. (III) Cellular oncogenes (c-onc) or proto-oncogenes have been identified in n

Options

  1. A(I) and (III) only
  2. B(II) and (IV) only
  3. C(I), (II) and (IV) only
  4. D(II), (III) and (IV) only

Correct answer

B. (II) and (IV) only

Step-by-step solution

Statement (I) is correct as normal cells exhibit contact inhibition which prevents their uncontrolled proliferation. Statement (II) is incorrect because Computed Tomography (CT) uses X-rays (ionizing radiations) to generate a three-dimensional image of the internals of an object. Magnetic Resonance Imaging (MRI) uses strong magnetic fields and non-ionizing radiations to accurately detect pathological and physiological changes in the living tissue. Statement (III) is correct as cellular oncogenes (c-onc) or proto-on

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