Zoology - Molecular Basis of Inheritance Question with Solution | TestHub
ZoologyMolecular Basis of InheritanceRegulation of Gene ExpressionEasy2 minPYQ_2020
ZoologyEasysingle choice
In negative operon
Options:
Answer:
A
Solution:
In a negative (repressible) operon, the repressor and co-repressor complex binds with the operator. The free repressor cannot bind to the operator. Immediately upstream of the three lac genes is a fourth gene that is responsible for the negative regulation of the operon. This gene expresses a protein called the lac repressor. The repressor can bind to a short sequence of the lac promoter. When repressor binds to that sequence it physically blocks access by RNA polymerase to the DNA.
Stream:NTA_ABHYAS_NEETSubject:ZoologyTopic:Molecular Basis of InheritanceSubtopic:Regulation of Gene Expression
⏱ 2mℹ️ Source: PYQ_2020
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