Zoology - Molecular Basis of Inheritance Question with Solution | TestHub
ZoologyMolecular Basis of InheritanceRegulation of Gene ExpressionEasy2 minPYQ_2020
ZoologyEasysingle choice
In the following diagram of the lac operon, which is an operon for inducible enzymes, identify the components and enzymes.
Options:
Answer:
A
Solution:
The lac operon (lactose operon) is an operon required for the transport and metabolism of lactose inEscherichia coliand some other enteric bacteria. It has three adjacent structural genes, lacZ, lac Y, and lac A. With lactose in the cell, inducer (Y) lactose binds to the repressor (X). This causes a structural change in the repressor, and it loses its affinity for the operator. Thus, RNA polymerase can then bind to the promoter and transcribe the structural genes. E1, E2 ,E3 represent B galactosidase, permease and transacetylase (they are synthesized from structural genes, lacZ, lacY, and lac A, respectively)
Stream:NTA_ABHYAS_NEETSubject:ZoologyTopic:Molecular Basis of InheritanceSubtopic:Regulation of Gene Expression
⏱ 2mℹ️ Source: PYQ_2020
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