Internal program of events and sequences of morphological changes by which cell commit a suicide is collectively called:
Correct answer: D. Apoptosis
- A. Necrosis
- B. Metastasis
- C. Epistasis
- D. Apoptosis
Explanation
Explanation:The internal program of events and sequences of morphological changes by which a cell commits suicide is collectively called apoptosis. Apoptosis is also known as programmed cell death.This option is incorrect. Necrosis is the death of body tissue due to a very low blood supply and can be caused due to injury, etc.This option is also incorrect. Metastasis refers to the spread of cancer cells from the primary tumor site to other parts of the body.Epistasis is a genetic phenomenon where the expression of one gene is influenced by another gene. It occurs when the alleles of one gene modify or mask the effects of another gene.
This question appeared on the UHS MDCAT 2009 paper, which you can sit online with every answer explained.
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Regeneration is the replacement of lost or damaged cells, tissues or body parts, ranging from ordinary tissue repair to regrowth in organisms such as planarians. Ageing covers progressive cellular and physiological decline, including reduced repair, senescence, genetic and environmental influences, and the difference between normal ageing and disease.
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