Question

The process of conversion of glucose in to pyruvic acid occurs in ….. (a) Mitochondria (b) Cytoplasm (c) Outside the cell (d) Chloroplast

Answer 1

Answer:

The process of conversion of glucose into pyruvic acid occurs in the Cytoplasm.

Explanation:

What is cellular respiration?

Cellular respiration, in layman's language, can be defined as the process by which respiratory substrates, such as glucose, amino acids, and fats are taken up by the cells and oxidised to release energy stored in the molecules.

What are the processes that occur in cellular respiration?

Namely, three distinct processes occur in the cell to the taken-up molecule to obtain energy by its oxidation. The steps are:

1. Glycolysis: This process occurs in the cytoplasm or cellular matrix of the cell. In this phase, the Glucose molecule is broken down into 2 molecules of pyruvic acid.
2. TCA cycle: This process occurs in the mitochondrial matrix of the cell, i.e., the inner lumen of mitochondria. In this phase, the pyruvic acid molecules are converted into Acetyl CoA molecules, which then go on a cyclic process by getting converted into various substrates, which are again utilized in different metabolic pathways.
3. ETS or oxidative phosphorylation: This process occurs in the inner mitochondrial membrane of mitochondria. The protons are pumped into the inter-mitochondrial lumen from the mitochondrial matrix enzymatically which are then allowed to flow along the concentration gradient back into the mitochondrial lumen. This flow generates ATP (energy) through the F₀-F₁ particles or oxysomes.

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