5. Enzymes
A section of Biology, 0610
Listing 10 of 248 questions
Catalase is an enzyme that catalyses the breakdown of hydrogen peroxide into water and oxygen. The effect of temperature on catalase activity was investigated. The results are shown in 0.0 temperature / °C catalase activity / arbitrary units 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 1.2 1.1 1.3 1.4 1.5 State the temperature at which catalase is most active in . °C Explain why there is no enzyme activity at 60 °C. State one factor other than temperature that affects enzyme activity. Digestive enzymes are used in chemical digestion to break down large insoluble molecules to smaller soluble molecules. The boxes show some large insoluble molecules, some digestive enzymes and some smaller soluble molecules that are produced during digestion. Draw one straight line from each enzyme to the insoluble molecule it acts on. Draw another line from each enzyme to the smaller soluble molecule that is produced. Draw a total of six lines. fat protein starch insoluble molecule soluble molecules amylase amino acids lipase fatty acids and glycerol protease sugars enzyme
0610_w18_qp_31
THEORY
2018
Paper 3, Variant 1
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An enzyme in potato cells causes oxygen to be produced from the breakdown of hydrogen peroxide. Cubes of potato tissue were placed in a hydrogen peroxide solution at different temperatures. The number of bubbles of oxygen released per minute was counted at each temperature. The table shows the results. temperature / °C number of bubbles of oxygen released per minute The results suggest the optimum temperature for the enzyme is between which two values?
0610_w24_qp_23
MCQ
2024
Paper 2, Variant 3
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Questions Discovered
248