Multiple choice

The inner membrane of mitochondria is highly selective to what it allows to enter the organelle. But one of the following molecules is regularly allowed to enter. Choose the correct one.

  1. ATP

  2. Citric acid

  3. Glucose

  4. Pyruvic acid

Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Intake of pyruvic acid in mitochondria is highly passive owing to its demand as a substrate for energy cycles taking place inside the mitochondrial matrix and inter-membranous space.