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Question
Differentiate between induction and repression.
Distinguish Between
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Solution
| Feature | Induction | Repression |
| Basic Concept | Turning ON a gene that is normally off. | Turning OFF a gene that is normally on. |
| Metabolic Context | Usually involved in catabolic pathways (breaking down substances). | Usually involved in anabolic pathways (building substances). |
| Trigger (Signal) | Triggered by an Inducer (the substrate to be broken down). | Triggered by a Co-repressor (the end-product of the pathway). |
| Repressor Status | The inducer inactivates the repressor, so it falls off the DNA. | The co-repressor activates the repressor, which then binds to DNA. |
| Example | Lac Operon: Switched on when lactose is present. | Trp Operon: Switched off when tryptophan levels are high. |
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Chapter 6: Molecular Basis of Inheritance - TEST YOUR PROGRESS [Page 274]
