Which statement comparing chloroplasts and mitochondria is true?
A) Chloroplasts and mitochondria each contain two membranes.
B) Chloroplasts and mitochondria use electrons from NADH to create a proton gradient.
C) Chloroplasts pump protons outside the organelle, while mitochondria pump protons inside the inner part of the organelle.
D) Chloroplasts and mitochondria use energy from a proton gradient to make ATP.

Question

Quizplus · Accepted Answer

Chloroplasts and mitochondria both use energy from a proton gradient to make ATP, but they differ in how they generate the gradient. Chloroplasts pump protons from the stroma to the thylakoid space, while mitochondria pump protons from the matrix to the intermembrane space. Both organelles have two membranes as well, but their electron transport chains differ in the order and location of the electron carriers.

Which Statement Comparing Chloroplasts and Mitochondria Is True