Step 1: Understanding glycolysis.
Glycolysis is the breakdown of glucose into pyruvate and occurs in the cytoplasm of the cell. It is the first step in cellular respiration. Step 2: Analyzing the options. (A) Golgi body: Incorrect — The Golgi body is involved in modifying and packaging proteins, not glycolysis. (B) mitochondria: Incorrect — Glycolysis takes place in the cytoplasm, not the mitochondria. (C) chloroplast: Incorrect — Chloroplasts are involved in photosynthesis, not glycolysis. (D) cytoplasm: Correct — Glycolysis occurs in the cytoplasm. Step 3: Conclusion.
The correct answer is (D) cytoplasm, as glycolysis occurs in the cytoplasm of the cell.