Which Regulatory Mechanism Does NOT Depend on a Conformational Change

question 68

Multiple Choice

Which regulatory mechanism does NOT depend on a conformational change in protein/enzyme structure to change activity?

• A) attenuation
• B) catabolite repression
• C) feedback inhibition
• D) negative control

---

Definitions:

Physostigmine

A naturally occurring cholinesterase inhibitor used in the treatment of myasthenia gravis and as an antidote to anticholinergic poisoning.

Black Widow Spider

A venomous spider identified by the red hourglass shape on its abdomen, known for neurotoxic venom that can cause significant pain and medical symptoms in humans.

Acetylcholine

A neurotransmitter in the nervous system involved in muscle movement and memory.

Nicotine

Nicotine is a stimulant drug found in tobacco products that can lead to addiction, it acts on the nervous system to increase alertness and can have harmful health effects.