Biology Bioenergetics UHS 2024
PMDC Verified Question 13 of 67
Enzyme NADP reductase is responsible for:
A
Reducing \( NADP^+ \)
B
Oxidizing \( NADP^+ \)
C
Reducing Ferredoxin
D
Reducing P700
Tap any option to test your recall and reveal the step-by-step Propolis autopsy.

Propolis Cognitive Error Autopsy

Official Correct Choice:
Option A: Reducing \( NADP^+ \)
Concept:

Enzymes are generally named after the substrate they act upon and the specific type of chemical reaction they catalyze.

Solution:

  • NADP reductase is located at the very end of the non-cyclic electron transport chain.
  • It takes two high-energy electrons from Ferredoxin and a proton (\( H^+ \)) from the stroma.
  • It adds these to \( NADP^+ \). The addition of electrons is called reduction.
  • Therefore, it is responsible for reducing \( NADP^+ \) to form NADPH.


Why other options are incorrect:

  • It does not oxidize \( NADP^+ \).
  • Ferredoxin is what reduces the enzyme, not the other way around.
  • P700 is reduced by plastocyanin.

Quality & Fidelity Assurance: Every question on BeambePrep is rigorously curated against the official PMDC syllabus with zero filler, zero out-of-syllabus content, and zero typos. When an authentic past paper originally contained a historical mistake or ambiguity from the examining board (such as UHS or NUMS), BeambePrep faithfully reflects the original paper while detailing the nuance and scientific consensus in the autopsy above.

Previous Question All Bioenergetics MCQs Next Question

Want to solve full-length papers under timed exam conditions?

Practice with zero-scroll lockdown sprints, dynamic latency zone timers, live peer selection telemetry, and the automated Amber mistake recovery loop.

Enter Arena Sprint iOS App Android App