Answer:
All cells are surrounded by a cell membrane. The cell membrane is semipermeable, allowing some substances to pass into the cell and blocking others.
Explanation:
Answer:
Enzymes help cells digest food, extract energy from food, and Increases the rate of chemical reactions.
Explanation:
They increase the rate of chemical reactions. Enzymes can be used to break things down, or to make things up.
Without enzymes, reactions in a cell would slow to a halt, to a point where the cell would die.
