Umiejętności z tego działu sprawdza 50 zadań wzorowanych na arkuszach IB z lat 2022–2026. Dział pojawia się w 34 z 57 arkuszy w bazie.
An enzyme catalyses the assembly of a larger molecule from smaller reactants. Which energy profile is consistent with an anabolic reaction that still has an activation barrier? R and P indicate the reactant and product ends of each curve. A. Profile A B.…
A model protease works best at 42 °C and pH 6.5. The experiment shown runs at 35 °C and pH 6.5. Which change can increase its rate at the plateau P? A. Reduce enzyme concentration by half B. Raise temperature from 35 °C to 42 °C C. Add more substrate while…
Which process is an example of catabolism? A. Joining glucose units into a storage polymer B. Assembling a protein from free amino acids C. Breaking a fatty acid into smaller molecules during respiration D. Producing an RNA chain from nucleotides
Discuss two variables that should be controlled in this investigation.
Which metabolic transformation is catabolic? A. Incorporating glucose into a growing glycogen chain B. Hydrolysis of a starch molecule into smaller sugar units C. Producing a triglyceride from glycerol and fatty acids D. Joining amino acids into a polypeptide
Explain the relationship between storage temperature and remaining enzyme activity.
Describe how a change in pH could be used to measure the rate of oil digestion by lipase.
The two models show the same enzyme before and during substrate binding. Which interpretation fits the change? A. The active site adjusts its conformation as the substrate binds B. The enzyme is permanently consumed by substrate binding C. The substrate…
Two pathways for the same reaction are shown. Which pair of labels is correctly interpreted? A. P: activation energy with catalyst; R: energy added by enzyme B. Q: activation energy with catalyst; R: energy released overall C. R: activation energy; P: energy…
Justify using amino-acid concentration as an indicator of protease activity.
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