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What is the optimum temperature for important human enzymes?

What is usually the optimum pH for enzymes? (What about pepsin?)

What is diffusion?

What is osmosis?

When a plant cell is plump and swollen with water, it is..., which makes for a well... plant

If a plant cell contains no water, it is..., this causes the plant to...

What is active transport?

Active transport requires what?

What are the three factors affecting the movement of substances? (which one does not affect active transport?)