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Question

Constitutive genes are those genes which are active:

A
During developmental stages
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B
During differentiation stages
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C
Throughout lifetime
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D
At any stage of life
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Solution

The correct option is C Throughout lifetime
A constitutive gene is a gene that is transcribed continually as opposed to a facultative gene, which is only transcribed when needed. A housekeeping gene is typically a constitutive gene that is transcribed at a relatively constant level. Examples of housekeeping genes include actin, GAPDH(Glyceraldehyde 3-phosphate dehydrogenase and ubiquitin.

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