19. Which of the following is not a general mechanism that cells use to maintain

Question

19. Which of the following is not a general mechanism that cells use to maintain stable pattens of gene 19. Which of the following is not a general mechanism that cells use to maintain stable patterns of gene expression as cells divide? (a) pitive feedback loop, mediated by a transcriptional regulator that activates transcription of its own gene in addition to other cell-type-specific genes (b) faithful propagation of condensed chromatin structures as cells divide (c) nheritance of DNA methylation patterns when cells divide d proper segregation of housekeeping proteins when cells divide

Explanation / Answer

Housekeeping genes are the constitutive genes that are required to maintain basic cellular function. These genes are expressed in both normal and patho-physiological conditions. The rate of their expression varies with experimental conditions but some genes express at constant levels in different patho-physiological conditions. Proper segregation of housekeeping proteins maintains stable patterns of gene expression during cell division.

Hence, the correct option among the following is d.

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