Which one of the following processes takes place in the cytoplasm?

The correct answer is Option (1) → Breakdown of Glucose into Pyruvate and Energy

The first step of respiration, glycolysis, splits a six-carbon glucose molecule into two three-carbon pyruvate molecules with a small release of energy, and it takes place in the cytoplasm of the cell.

What happens to the pyruvate afterwards depends on the conditions: in our muscles it turns to lactic acid, in yeast to ethanol and carbon dioxide, and in the presence of oxygen it is oxidised completely to carbon dioxide and water — but that last, aerobic stage occurs in the mitochondria, not the cytoplasm.