In fungi, digestion of relatively large food molecules typically begins in where?

• A. Inside the cytoplasm
• B. Mitochondrial matrix
• C. Lysosome
• D. Extracellular environment

Answer: (D)

Digestion of large food molecules begins outside the cell. Fungi release digestive enzymes into the surrounding environment (toward the tips of their hyphae), breaking polymers such as cellulose, starch, proteins, and others into smaller molecules. These smaller molecules can then be absorbed across the cell membrane into the cytoplasm for metabolism. This extracellular digestion is necessary because big polymers cannot cross the cell membrane directly, so the initial breakdown happens outside the cells rather than inside organelles like lysosomes or in the cytoplasm or mitochondria.