Where Do the Reactions of Cellular Respiration Occur

Question

Where do the reactions of cellular respiration occur?
A) in the nucleolus of the nucleus
B) in the ribosomes of the rough endoplasmic reticulum
C) in the matrix of the mitochondria
D) in the hydrophobic core of the plasma membrane

Accepted Answer

Cellular respiration occurs in the matrix of the mitochondria. This is where the majority of the metabolic reactions take place, including the Krebs cycle and oxidative phosphorylation. The nucleolus is involved in the synthesis of ribosomes, not cellular respiration. The ribosomes of the rough endoplasmic reticulum are not involved in cellular respiration either. Lastly, the hydrophobic core of the plasma membrane is not a suitable environment for metabolic reactions to occur.