What you'll learn

• 1Osmosis: water moves from dilute to concentrated across a partially permeable membrane.
• 2Active transport moves against the gradient - needs energy.
• 3Enzymes are biological catalysts; each has an optimum pH and temperature.
• 4Denaturation changes the active site so substrate no longer fits.

Question mix

• Multiple choice×4
• Fill the gap×1

• 1

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• 2

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• 3

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