MCQ Collection
Pakistan MCQs
Practice Pakistan questions with answers and explanations.
Choose an option to check your answer.
Correct Answer: A. It can reduce the inhibitor effect
Explanation:
Substrate and competitive inhibitor compete for the active site.
More substrate raises the chance of productive binding.
Choose an option to check your answer.
Correct Answer: B. Medulla oblongata
Explanation:
The medulla contains vital autonomic centers.
It regulates respiration and cardiovascular activity.
Choose an option to check your answer.
Correct Answer: B. It can reduce the inhibitor effect
Explanation:
Substrate and competitive inhibitor compete for the active site.
More substrate raises the chance of productive binding.
Choose an option to check your answer.
Correct Answer: C. Medulla oblongata
Explanation:
The medulla contains vital autonomic centers.
It regulates respiration and cardiovascular activity.
Choose an option to check your answer.
Correct Answer: C. It can reduce the inhibitor effect
Explanation:
Substrate and competitive inhibitor compete for the active site.
More substrate raises the chance of productive binding.
Choose an option to check your answer.
Correct Answer: D. Receptor → sensory neuron → relay neuron → motor neuron → effector
Explanation:
A reflex begins with receptor stimulation and sensory input.
Motor output then activates an effector.
Choose an option to check your answer.
Correct Answer: D. High specific heat capacity
Explanation:
Water absorbs substantial heat with a small temperature rise.
This stabilizes cells, bodies and habitats.
Choose an option to check your answer.
Correct Answer: D. Converts stimulus energy into an electrical signal
Explanation:
Receptors act as biological transducers.
They convert physical or chemical stimuli into nerve signals.
Choose an option to check your answer.
Correct Answer: A. Acetyl-CoA
Explanation:
Beta oxidation breaks fatty acids into acetyl-CoA units.
Acetyl-CoA enters the Krebs cycle.
Choose an option to check your answer.
Correct Answer: A. High specific heat capacity
Explanation:
Water absorbs substantial heat with a small temperature rise.
This stabilizes cells, bodies and habitats.
Choose an option to check your answer.
Correct Answer: A. Converts stimulus energy into an electrical signal
Explanation:
Receptors act as biological transducers.
They convert physical or chemical stimuli into nerve signals.
Choose an option to check your answer.
Correct Answer: B. Acetyl-CoA
Explanation:
Beta oxidation breaks fatty acids into acetyl-CoA units.
Acetyl-CoA enters the Krebs cycle.
