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IGCSE Quiz - 15 May

Lactase catalyses digestion of lactose into glucose and galactose. Which is the lock and key?
Lock = Lactase, Key = Lactose
Lock = Lactose, Key = Lactase
Lock = Lactase, Key = Glucose and Galactose
Lock = Lactose, Key = Glucose and Galactose
Which of the following happens during the light stage of photosynthesis? Choose one or more answer.
Light energy is absorbed by chlorophyll
Photolysis of water
Reduction of carbon dioxide into glucose
Photolysis of carbon dioxide
What wavelengths of light are strongly absorbed during photosynthesis? Choose one or more answer.
Green
Red
Blue
Violet
What is a limiting factor?
A factor that indirectly affects a process if its quantity is affected
A factor that directly affects a process if its quantity is affected
A factor that directly affects a process if its quantity is not affected
A factor that indirectly affects a process if its quantity is not affected
Which of the following is true of the dark stage of photosynthesis? Choose one or more answer.
Reduction of carbon dioxide into glucose
The reactions are catalyzed by enzymes
Water is produced
Oxygen is produced
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