Enzymes Quiz
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Which enzyme is most efficient in a basic solution?
A. A
B. B
Which of the following is true about enzymes?
A. Enzymes are proteins that can undergo denaturation
B. Enzymes are inorganic catalysts
C. Enzymes are carbohydrates that provide energy
D. Enzymes are lipids that store genetic information
After the enzyme and substrate bind together and perform the reaction, what does the substrate become?
A. a substrate
B. an enzyme
C. a product
D. an active site
What is enzyme-substrate specificity?
A. Enzymes can only bind to one specific substrate
B. Enzymes can bind to multiple substrates
C. Enzymes can bind to any molecule in the reaction
D. Enzymes can only bind to inorganic catalysts
What is the optimum temperature for enzyme activity in the human body?
A. 0°C
B. 25°C
C. 37°C
D. 50°C
What happens when an enzyme denatures?
A. The enzyme becomes overused
B. The substrate has run out
C. The primary structure of the protein ahs changed
D. The shape of the active site has changed
Which letter represents the product?
A. A
B. B
C. C
D. D
Letter c…
A. active site
B. enzyme
C. substrate
D. products
How does an enzyme function as a catalyst?
A. By increasing the temperature of the reaction
B. By changing the pH of the reaction
C. By providing energy for the reaction
D. By lowering the activation energy of the reaction
Each enzyme only has 1 substrate that will fit its active site. What is this called?
A. reusablility
B. denaturation
C. specificity
D. fragility
What is the effect of substrate concentration on enzyme activity?
A. Higher substrate concentration increases enzyme activity
B. Lower substrate concentration increases enzyme activity
C. Substrate concentration has no effect on enzyme activity
D. Extreme substrate concentration denatures enzymes
What is the role of enzymes in anabolic reactions?
A. Enzymes break down large molecules into smaller molecules
B. Enzymes build up large molecules from smaller molecules
C. Enzymes provide energy for the reaction
D. Enzymes change the pH of the reaction
The graph shows how enzymes affect reactions in cells.Which statement best summarizes the information shown in the graph?
A. Enzymes increase the energy of the reactants.
B. Enzymes decrease the energy level of the products.
C. Enzyme decrease the activation energy of the reaction.
D. Enzymes reverse the direction of the reaction.
What is the role of enzymes in catabolic reactions?
A. Enzymes break down large molecules into smaller molecules
B. Enzymes build up large molecules from smaller molecules
C. Enzymes provide energy for the reaction
D. Enzymes change the pH of the reaction
What factors can affect the activity of an enzyme?
A. Temperature and pH
B. Concentration of the enzyme
C. Concentration of the substrate
D. All of the above
Which of the following conclusionscan be drawn from this graph?
A. The optimum pH of theenzyme is 6.6.
B. The optimum pH of the enzymeis 5.8
C. The enzyme’s activity increases as pH increases5.0 to 9.0
D. The enzyme’s activity is greater around pH of 8.0 .
Which of the following best explains why enzymes are necessary for many cellular reactions?
A. Enzymes supply the oxygen necessary for the reactions
B. Enzymes change reactants from solid to liquids during the reactions.
C. The reactions take up too much space in the cell if the enzymes are missing.
D. The reactions are too slow to meet the needs of the cell if enzymes are missing.
Which of the following enzymes is used for making lactose-free products?
A. Amylase
B. Lactase
C. Protease
D. Catalase
What is the role of activators in enzyme reactions?
A. Activators increase the rate of enzyme reactions
B. Activators decrease the rate of enzyme reactions
C. Activators denature enzymes
D. Activators have no effect on enzyme reactions
What is the effect of pH on enzyme activity?
A. pH has no effect on enzyme activity
B. Higher pH increases enzyme activity
C. Lower pH increases enzyme activity
D. Extreme pH denatures enzymes
Which of these is NOT true?
A. Enzymes can denature (change shape) when the temperature gets too high.
B. Enzymes can only be used once in a chemical reaction.
C. Extreme pH can denature enzymes.
D. Enzymes speed up chemical reactions.
What happens to an enzyme when it is exposed to extreme temperatures?
A. The enzyme denatures and loses its shape
B. The enzyme becomes more active
C. The enzyme changes its substrate specificity
D. The enzyme breaks down into smaller molecules
What is the role of inhibitors in enzyme reactions?
A. Inhibitors increase the rate of enzyme reactions
B. Inhibitors decrease the rate of enzyme reactions
C. Inhibitors denature enzymes
D. Inhibitors have no effect on enzyme reactions
What is a substance called if it speeds up a chemical reaction?
A. reusable
B. catalyst
C. specific
D. fragile
What is an enzyme?
A. A type of protein that increases the rate of a chemical reaction
B. A type of inorganic catalyst
C. A type of carbohydrate that provides energy
D. A type of lipid that stores genetic information
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