DP Biology Questionbank
2.5 Enzymes
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Nature of science: Experimental design—accurate, quantitative measurements in enzyme experiments require replicates to ensure reliability. (3.2) |
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Directly related questions
- 16N.3.SL.TZ0.2a: Suggest one reason for differences between the cereal grains, in the percentage of starch...
- 21N.1.SL.TZ0.9: Lactose can be removed from milk by passing the milk through a column of alginate beads to which...
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22M.2.SL.TZ2.5b:
In biotechnology, enzymes are used to transfer genes to bacteria. Outline how two specific enzymes are used for the transfer.
- 18N.1.HL.TZ0.8: The graph shows the effect of changing the substrate concentration on the early stages of an...
- 18M.1.SL.TZ1.10: What is the advantage of using lactase in an immobilized state in the food manufacturing...
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18M.3.SL.TZ1.1c:
Evaluate the claim that, based on the data, the optimum H2O2 concentration for catalase is 70 mM.
- 18M.2.SL.TZ2.4b: Explain enzyme–substrate specificity.
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19M.3.HL.TZ1.1b:
The graph of the effect of pH on immobilized lipase activity does not allow for the determination of optimum pH precisely. Explain how a more exact value for the optimum pH could be determined.
- 16N.1.SL.TZ0.9: A fever in a normally healthy adult during an illness is not usually a problem and can be...
- 16N.3.HL.TZ0.1a: State the effect of enzyme concentration on the hydrolysis of proteins.
- 17M.3.SL.TZ1.1a: Outline what the standard deviations reveal about the data from this experiment.
- 17M.3.SL.TZ1.1b: One result in this experiment can be classified as an outlier as its value is very distant from...
- 21M.1.HL.TZ1.28: Which statement applies to the tertiary structure of enzymes? A. Tertiary structure is the...
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22M.2.HL.TZ2.7a:
Outline, using graphs, the effect of different factors that influence enzyme activity.
- 18M.3.SL.TZ1.1b: Identify two factors that would need to be controlled in generating these data.
- 19M.3.HL.TZ1.1a: State the effect immobilization of lipase has on its optimum temperature.
- 19N.3.SL.TZ0.2a: State another independent variable that would affect the activity of this enzyme.
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16N.3.SL.TZ0.2b:
Suggest one method that could have been used to keep the tubes at a constant temperature.
- 17M.1.SL.TZ1.21: Cladograms can be created by comparing DNA or protein sequences. The cladogram on the left is...
- 17M.3.SL.TZ1.1d: State one factor that would need to be controlled in this experiment.
- 21M.1.SL.TZ1.14: Which statement applies to enzymes? A. Enzyme function depends on collisions between substrate...
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21M.1.SL.TZ1.15:
Which enzyme is matched to its function?
- 22M.1.SL.TZ1.8: The graph shows enzyme activity plotted against temperature. What is the reason for the...
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18M.3.SL.TZ1.1a:
Describe the relationship between increasing H2O2 concentration and catalase activity.
- 16N.3.SL.TZ0.2c: Explain the importance of having equal quantities of the enzyme at the start of the experiment.
- 17M.1.SL.TZ1.10: The graph shows the effect of increasing the substrate concentration on the rate of an...
- 17M.1.SL.TZ2.27: The bacterium Neisseria gonorrhoeae causes infections related to the human reproductive system....
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21M.2.SL.TZ2.3b:
State a role of the active site of an enzyme.
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21M.2.HL.TZ2.2d.ii:
Explain what happens to an enzyme if there is a change of pH.
- 22M.1.HL.TZ1.5: The graph shows the activity of an enzyme at various temperatures. The pH of the experiment was...
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18M.2.HL.TZ1.6c:
Hydrogen bonds can exist both within and between molecules in living organisms and have an impact on their structure and function. Explain the importance of hydrogen bonding for living organisms.
- 18M.2.HL.TZ2.4c: Explain how enzymes catalyse chemical reactions.
- 16N.1.HL.TZ0.9: It is possible to attach β-galactosidase to alginate beads for use in the production of...
- 21M.1.HL.TZ1.30: Succinate dehydrogenase is an enzyme that catalyses the oxidation of succinic acid. If malonic...
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22M.2.SL.TZ2.5a:
Explain the decrease in activity of the enzyme on either side of the optimum temperature.
- 19N.1.SL.TZ0.10: What effect do changes in pH have on enzymes? A. All enzymes increase in activity as pH...
- 19N.3.SL.TZ0.2b: Outline the measurements which would need to be taken to determine the activity of the...
- 16N.3.HL.TZ0.1b: Sketch on the graph the curve expected if the hydrolysis were performed using papain 0.5 %.
- 17M.1.SL.TZ1.7: In an experiment the effect of changing pH on an enzymatic reaction is tested. Which could be a...
- 17M.3.SL.TZ1.1c: Outline the effect of temperature on the activity of urease enzyme.
- 22M.1.SL.TZ2.10: Which curve shows the concentration of product during the course of an enzyme-catalysed reaction?
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19M.1.SL.TZ2.10:
Lactose intolerance occurs when the enzyme, lactase, that digests lactose is not produced after infancy in humans. The incidence of lactose intolerance varies in different racial groups. The graph shows the distribution of lactose intolerance in different human populations.
[Source: © International Baccalaureate Organization 2019]
What can be hypothesized from the graph?
A. Native American people produce most lactase after infancy.
B. Most Indian people do not produce lactase after infancy.
C. Lactase is not produced after infancy in most Caucasian people.
D. One quarter of Afro-Caribbean people will probably experience digestive problems when drinking milk.
- 17M.2.SL.TZ1.1c: Estimate how much smaller drilled oysters raised in seawater at a high CO2 concentration were...
- 17M.2.HL.TZ1.1f.ii: Suggest a reason for the greater expression of the gene for the urea transporter after an...
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17N.1.SL.TZ0.09:
Three flasks were prepared for an analysis of the activity of amylase. At time zero, each of the substances indicated in the diagrams was added.
Which flask(s) could provide support for the hypothesis that heat denatures enzymes?
A. Flasks I and II after 15 minutes
B. Flasks II and III after 15 minutes
C. Flasks I and III after 15 minutes
D. Flask III at time zero and again after 15 minutes
- 21M.1.HL.TZ1.8: The graph shows the progress of the same enzyme-controlled reaction at two different...
- 22M.1.HL.TZ2.29: Ethylene glycol is used as an antifreeze chemical. If a person ingests it accidentally, ethylene...
- 18N.1.SL.TZ0.10: Living organisms control pH within their tissues. What is a reason for regulating pH? A. All...
- 16N.3.HL.TZ0.1c: Explain what would happen to fish protein hydrolysis if no alkali were added to the reaction vessel.
- 21M.1.HL.TZ2.29: The dashed line shows the relationship between the activity of an enzyme and the concentration of...
- 18M.2.SL.TZ2.4a: Sketch a graph to show the effect of temperature on the activity of enzymes.
- 19M.3.HL.TZ1.1c: Based on these experimental results, suggest one advantage of immobilizing lipase.