Required Practical: Enzymes (OCR GCSE Biology A (Gateway Science Suite)): Flashcards
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Enzymes definition
Enzymes definition
Biological catalysts that speed up chemical reactions in the body
Amylase function
Amylase function
Breaks down starch into maltose
Iodine solution use in enzyme practical
Iodine solution use in enzyme practical
To test for starch
Iodine colour with starch present
Iodine colour with starch present
Blue-black
Iodine no longer turns blue-black meaning
Iodine no longer turns blue-black meaning
Starch has been fully broken down
Testing interval in enzyme practical
Testing interval in enzyme practical
Every 30 seconds
Optimum temp for human enzymes
Optimum temp for human enzymes
Around 37°C
Effect of temp beyond optimum on enzyme
Effect of temp beyond optimum on enzyme
Enzyme becomes denatured, rate decreases sharply
Rate of reaction as temp increases to optimum
Rate of reaction as temp increases to optimum
Increases
Optimum pH for enzymes
Optimum pH for enzymes
pH at which rate of reaction is fastest
Effect of pH deviations from optimum
Effect of pH deviations from optimum
Can cause enzyme to denature, reducing rate
Optimum conditions for enzymes
Optimum conditions for enzymes
Specific temperatures and pH levels where they work best
Impact of environmental factors on enzymes
Impact of environmental factors on enzymes
Temperature and pH can affect enzyme activity