mMCQ.

Navigation Menu

Step into mMCQ.

Launch mMCQ. diagnostic

Explore mMCQ.

MDCAT prepFree DiagnosticPricing & SubscribeSign in

Resources

Terms & Conditions

mMCQ.

© 2021 - 2025 mMCQ.All rights reserved.

WhatsApp
O Levels Biology (5090)•5090/11/M/J/22
Question 17 from 5090/11/M/J/22

Explanation

Aerobic Respiration Equation Steps:

  • Identify aerobic respiration as the process breaking down glucose with oxygen to release energy, producing CO₂ and H₂O.
  • Recall the balanced equation: C₆H₁₂O₆ + 6O₂ → 6CO₂ + 6H₂O.
  • Compare choices to this standard formula for plant cells (same as in animals).
  • Eliminate options that match photosynthesis or unbalanced reactions.

Why B is correct:

  • It exactly matches the balanced equation for aerobic respiration, showing glucose and oxygen yielding CO₂ and water.

Why the others are wrong:

  • A: Represents photosynthesis, the reverse process building glucose from CO₂ and H₂O.
  • C: Unbalanced and unrelated; resembles incomplete oxidation, not standard respiration.
  • D: Unbalanced, missing the coefficient 6 for CO₂, so it doesn't conserve atoms.

Final answer: B

Topic: Aerobic respiration

Practice more O Levels Biology (5090) questions on mMCQ.me