What Do You Know About Spc Enzymes? Trivia Quiz
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- 1.Enzymes are composed of;
- A.
Protein
- B.
Lipid
- C.
Carbohydrate
- D.
Nucleic acids
- 2.The active site of an enzyme may be denatured by heat. Excessive heat causes;
- A.
A change in the secondary and/or tertiary structure of the protein molecule
- B.
A change in the structure of the amino acid molecules in the protein
- C.
A change in the amino acid sequence in the peptide chains making up this region
- D.
Particular amino acids to be substituted for less active amino acids
- 3.
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Use the following to answer questions 3-4 In the equation above, lactose is the;- A.
Enzyme
- B.
Substrate
- C.
Co-factor
- D.
Product
- 4.If no lactase was present in the person due to a genetic abnormality, there would be;
- A.
No conversion of lactose
- B.
Less lactose in the small intestine
- C.
Very little conversion of lactose
- D.
A build-up of glucose in the small intestine
- 5.
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A new species of bacteria has been found living in Antarctica. The enzyme activity in this bacteria is shown below: The optimum temperature is most likely to be:- A.
37 degrees celsius
- B.
-2 degrees celsius
- C.
35 degrees celsius
- D.
100 degrees celsius
- 6.Enzymes are denatured by extreme temperatures. It is reasonable to conclude that;
- A.
All enzymes would denature at 42 degrees Celsius
- B.
When cooled the enzyme would continue to function
- C.
The active site would be temporarily changed
- D.
The reaction catalysed by the enzyme would still proceed slowly
- 7.The lysosome is an important organelle structure that is found in animal cells. These organelles contain hydrolase enzymes that help the cell to break down cellular debris and other waste. Suppose a type of hydrolase enzymes is known as hydrolase K. Assume starting and optimal conditions are 37 degrees Celsius and pH = 7. There are no inhibitors present and a large excess of substrate and cofactor is available. Choose the correct checkbox below on the effect on the activity of enzyme K if there was an increase of pH of 0.5.
- A.
Increase in activity
- B.
Decrease in activity
- C.
No change in activity
- D.
Cannot be determined
- 8.The lysosome is an important organelle structure that is found in animal cells. These organelles contain hydrolase enzymes that help the cell to break down cellular debris and other waste. Suppose a type of hydrolase enzymes is known as hydrolase K. Assume starting and optimal conditions are 37 degrees Celsius and pH = 7. There are no inhibitors present and a large excess of substrate and cofactor is available. Choose the correct check box below on the effect on the activity of enzyme K if there was an increase of in temperature to 80 degrees Celsius.
- A.
Increase in activity
- B.
Decrease in activity
- C.
No change in activity
- D.
Cannot be determined
- 9.The lysosome is an important organelle structure that is found in animal cells. These organelles contain hydrolase enzymes that help the cell to break down cellular debris and other waste. Suppose a type of hydrolase enzymes is known as hydrolase K. Assume starting and optimal conditions are 37 degrees Celsius and pH = 7. There are no inhibitors present and a large excess of substrate and cofactor is available. Choose the correct checkbox below on the effect on the activity of enzyme K if there was a doubling of the concentration of Enzyme K.
- A.
Increase in activity
- B.
Decrease in activity
- C.
No change in activity
- D.
Cannot be determined
- 10.Thermus aquaticus is a species of bacteria found in hot springs of near boiling water. It would be reasonable to conclude with respect to its enzymes that;
- A.
Their optimum temperature for activity would be 37 degrees Celsius
- B.
Their active site would be unaffected by temperatures of 80 degree Celsius
- C.
Their active site would be denatured at around 30 degrees Celsius
- D.
Product formation would be independent of temperature
- 11.Amylase is a type of enzyme involved in the breakdown of starches in the stomach. It would be reasonable to conclude that amylase is a:
- A.
Storage protein
- B.
Contractile protein
- C.
Globular protein
- D.
Hormonal protein
- 12.
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The graph depicted below shows the rate of enzyme activity (lactase) as substrate (lactose) is increased. The graph levels off at point X because:- A.
All enzyme active sites are temporarily occupied
- B.
No more substrate is being added
- C.
The amount of product produced has reached a constant level
- D.
The enzyme has been denatured
- 13.An enzyme is denatured when:
- A.
Irreversible damage is done to the protein structure of its active site due to changes in temperature and pH
- B.
Irreversibly damage is done to the protein structure of the entire enzymes due to changes in temperature and pH
- C.
Irreversible damage is done to the protein structure of its active site due to the changes in temperature and pH outside the enzyme's optimal range
- D.
Irreversible damage is done to the protein structure of the entire enzyme due to changes in temperature and pH outside the enzyme's optimal range
- 14.
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Creation of the enzyme Hexokinase, used in the Glycolysis stage of cellular respiration would occur in:- A.
Organelle A
- B.
Organelle B
- C.
Organelle C
- D.
Organelle D
- 15.
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The diagram above best depicts the- A.
Interaction between an antigen and an antibody
- B.
Interaction between a receptor and a signaling molecule
- C.
Interaction between an enzyme and a substrate
- D.
Action on a non-competitive drug to slow down metabolism
- 16.Which of the following statements best refers to the action of enzymes?
- A.
They are able to catalyse many different types of reactions
- B.
They increase the activation energy of a chemical reaction
- C.
They circulate in the blood stream until required
- D.
They are released unchanged after binding to a substrate
- 17.Many enzymes require zinc or magnesium ions in order to catalyze a reaction. These ions are referred to as:
- A.
Activators
- B.
Cofactors
- C.
Coenzymes
- D.
Substrates
- 18.
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Catalase is an enzyme that catalyzes the conversion of hydrogen peroxide (H2O2) solution into water (H2O) and oxygen gas (O2) according to the following reaction. Which of the following would be the best way of estimating the rate of this reaction?- A.
Measure the volume of water produced
- B.
Measure the amount of hydrogen peroxide remaining
- C.
Measure the amount of water displaced by oxygen
- D.
Measure the amount of enzyme remaining
- 19.
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The following diagrams show a segment of a metabolic pathway. Substance 1 is used as a substrate to produce substances 2, 3 and 4. Enzymes A and B need the presence of the magnesium ions (Mg2+)in order to catalyze the reaction. What is the most accurate conclusion that can be drawn if the magnesium ions are absent?- A.
Substance 1 will accumulate
- B.
Substance 2 will accumulate
- C.
Synthesis of substance 3 will increase
- D.
Synthesis of substance 1 will increase
- 20.A scientist designs synthetic enzymes that have an identical amino acid sequence to an enzyme extracted from a living organism. When tested under identical conditions it is found that the natural enzyme is able to break down the substrate while the synthetic enzyme can not. The best explanation for this would be:
- A.
There was no ATP available to the synthetic enzyme
- B.
The synthesised enzyme did not have the correct secondary and tertiary structures
- C.
The active site of the synthetic enzyme was blocked
- D.
The amino acids incorporated into the synthetic enzyme were all denatured
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