Question

in the process of intracellular digestion, what do you predict will happen if food vacuoles are unable to fuse with lysosomes? cells will not be able to engulf liquid food by phagocytosis. cells will not be able to engulf solid food by pinocytosis. the cells will not be able to utilize their hydrolytic enzymes. the food to be digested will not be able to come in contact with hydrolytic enzymes.

Explanation:

1. Analyze Option 1: Phagocytosis is for solid food, and the fusion of food vacuoles with lysosomes is not related to the ability to engulf liquid food (which is pinocytosis), so this is incorrect.
2. Analyze Option 2: Pinocytosis is for liquid food, and phagocytosis is for solid. Also, the fusion issue doesn't affect engulfment but digestion, so this is wrong.
3. Analyze Option 3: Lysosomes have hydrolytic enzymes, but the cell still has the enzymes; the problem is the food not contacting them, not the cell being unable to utilize enzymes in general, so this is incorrect.
4. Analyze Option 4: Lysosomes contain hydrolytic enzymes. When food vacuoles (with food) fuse with lysosomes, the food comes in contact with these enzymes for digestion. If they can't fuse, the food in vacuoles won't meet the enzymes, so this is correct.

Answer:

The food to be digested will not be able to come in contact with hydrolytic enzymes.