Molecular Basis Of Inheritance Ques 109
109. Genes that are involved in turning on or off the transcription of a set of structural genes are called
[1998]
(a) Operator genes
(b) Redundant genes
(c) Regulator genes
(d) Polymorphic genes
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Answer : c
Hints & Solution
(c) A regulator gene is a gene involved in controlling the expression of one or more other genes. In prokaryotes, regulator genes often code for repressor proteins. Repressor proteins bind to operators or promoters, preventing RNA polymerase from transcribing RNA.
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