Question

Where does cellular respiration take place in the following processes: pyruvate decarboxylation, Krebs cycle, etc?

A) Pyruvate decarboxylation: Mitochondrial matrix; Krebs cycle: Cytoplasm; etc: Endoplasmic reticulum
B) Pyruvate decarboxylation: Cytoplasm; Krebs cycle: Mitochondrial matrix; etc: Nucleus
C) Pyruvate decarboxylation: Cytoplasm; Krebs cycle: Mitochondrial matrix; etc: Endoplasmic reticulum
D) Pyruvate decarboxylation: Nucleus; Krebs cycle: Cytoplasm; etc: Mitochondrial matrix

Answer 1

Cellular respiration takes place in different locations depending on the stage: Pyruvate decarboxylation occurs in the cytoplasm, the Krebs cycle takes place in the mitochondria's matrix, and oxidative phosphorylation happens on the inner membrane of the mitochondria.

Step-by-step explanation:

Pyruvate decarboxylation: Pyruvate is transformed into Acetyl CoA in the cytoplasm of the cell.

Krebs cycle: The Krebs cycle takes place in the matrix of the mitochondria.

Oxidative phosphorylation: This stage occurs on the inner membrane of the mitochondria, where electrons are transported through an electron transport chain to produce ATP.