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C1.1 Enzymes & metabolism - revision quiz
Quiz by L
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Which is the best explanation of the effect of increasing the substrate concentration on the rate of an enzyme-controlled reaction?
What would be the effect of gradually increasing the pH of a solution from pH6.0 to pH8.0 on the rate of a reaction catalyzed by an enzyme which has an optimum pH of 7.2 ?
Which phrase best describes enzyme substrate specificity?
When bound to the active site, what effect do lactase enzymes have on the bonds holding glucose to galactose in the disaccharide lactose molecules?
What is the name of the site on an enzyme where a substrate binds to the enzyme?
What might cause the denaturation of enzymes?
Which of the following best describes the role of molecular motion in enzyme catalysis?
What is the general term that sums up 'chains and cycles of enzyme-catalyzed reactions'?
The graph shows the rate of activity of yeast catalase against different pH values. Estimate the optimum pH for the activity of this enzyme.
The graph shows the data from an investigation of the rate of activity of yeast catalase against different pH values. Which of the following variables must be controlled to give accurate data?
I Enzyme concentration
II Temperature
III pH
IV Volume of enzyme and substrate solution.
What is the reason for the lower rate of activity of bacterial amylase with starch at a temperature of 400C than the rate at 300C optimum temperature?
What is the reason that the rate of an enzyme-controlled reaction increases with substrate concentration until it reaches a maximum value and then remains constant?
How do enzymes lower the activation energy of the reaction that they catalyse?
Which of the following are benefits of the control of metabolic pathways by enzymes?
The diagram shows the production of Vitamin C from glucose in plants.
Which of the following statements are correct in regard to this process?
The diagram shows metabolic pathways in the mitochondria of the brain.
Metabolic pathways are _____ and cycles of enzyme _____ reactions. As enzymes are _____, there is one enzyme for _____ step in the pathway and this both increases the reaction rate but also allows the _____ of the pathways to produce the end _____ needed by the organelle and _____.
