Blueprint MCAT Formerly Next Step
Return to Blog Homepage

MCAT Biology Question — Metabolic Energy

  • by John
  • Mar 19, 2017
  • MCAT Question of the Day

The production of which of the following molecules will cease when oxygen is no longer supplied to the cell?

  1. Pyruvate
  2. Water
  3. Adenosine triphosphate
  4. None of the above
Explanation

Oxygen is necessary to aerobic respiration in mitochondria, as oxygen is the final electron acceptor of the electron transport chain. However, each of the products listed can be produced via anaerobic respiration.

a) Incorrect: Pyruvate is a product of glycolysis and can be converted into lactic acid via anaerobic pathways.

b) Incorrect: Water is a product of glycolysis, as well as other metabolic pathways. 

c) Incorrect: Adenosine triphosphate (ATP) is a product of glycolysis

d) Correct: None of the above will cease being produced.

Want more MCAT practice?

We’ve got options for every schedule and learning style!

From the best online MCAT course created by top instructors with 524+ MCAT scores to the most representative full-length practice exams and private tutoring, we can custom tailor your MCAT prep to your goals!

Not sure which option is right for you? Schedule a free MCAT consultation with an MCAT expert using the form below. No obligation, just expert advice.

Submit a Comment