In aerobic respiration, the steps are : breakdown of glucose to pyruvate and its further conversion to carbon…

Question

In aerobic respiration, the steps are : breakdown of glucose to pyruvate and its further conversion to carbon dioxide. Both processes respectively occur in –

Accepted Answer

## Model Answer **Option D: Cytoplasm and Mitochondria** Breakdown of glucose to pyruvate occurs in the **cytoplasm**, and further breakdown of pyruvate to carbon dioxide (aerobic respiration) occurs in the **mitochondria**. ## Explanation The textbook (Section 5.3) clearly states: "The first step is the break-down of glucose into pyruvate — this takes place in the **cytoplasm**. Break-down of pyruvate using oxygen takes place in the **mitochondria**." This is a frequently asked fact; remember the sequence: Cytoplasm → Mitochondria for aerobic respiration.

Science — CBSE Class 10 board question