Enzymes (Edexcel GCSE Biology): Flashcards
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15 cards from this deck
What are enzymes?
What are enzymes?
Biological catalysts
What is the active site of an enzyme?
What is the active site of an enzyme?
Part where substrate binds to catalyse reaction
Lock & key: substrate shape to active site
Lock & key: substrate shape to active site
Complementary
What is a substrate?
What is a substrate?
Molecule changed in reaction
Optimum temp for most enzymes
Optimum temp for most enzymes
37°C
What is denaturation?
What is denaturation?
Active site changes shape, enzyme can't function
Optimum pH for most enzymes
Optimum pH for most enzymes
7 (neutral)
Amylase breaks down
Amylase breaks down
Starch into maltose
Proteases break down
Proteases break down
Proteins into amino acids
Lipases break down lipids into
Lipases break down lipids into
Fatty acids and glycerol
Benedict's test positive result
Benedict's test positive result
Brick red colour (for sugars)
Iodine test positive result
Iodine test positive result
Blue-black colour (for starch)
Biuret test positive result
Biuret test positive result
Purple colour (for protein)
Bile neutralises
Bile neutralises
Acid from stomach (bile is alkaline)
Bile emulsifies
Bile emulsifies
Fats into smaller droplets, increases surface area