Q26 - Cellular structures

The correct answer is A) Mitochondria.

Cellular respiration has three stages. Glycolysis takes place in the cytoplasm, but the Krebs cycle (in the matrix) and oxidative phosphorylation (on the inner membrane) take place in the mitochondria, where most of the ATP is made.

A) Correct: Mitochondria are the main site of cellular respiration.

B) Incorrect: Ribosomes synthesise proteins.

C) Incorrect: The endoplasmic reticulum synthesises and transports proteins and lipids.

D) Incorrect: Chloroplasts carry out photosynthesis, and only in plants and algae.

E) Incorrect: Lysosomes digest material using hydrolytic enzymes.