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IB Biology SL C1.1 Enzymes and Metabolism Question Bank

Practise IB Biology SL C1.1 by explaining enzyme specificity, metabolic reactions and rate evidence from temperature, pH and substrate experiments.

Syllabus
First assessment 2025
Course
Biology SL
Level
SL

Exam points

  • explain enzyme specificity through active-site chemistry, substrate binding and induced fit
  • distinguish anabolic reactions that build molecules from catabolic reactions that release smaller products
  • interpret enzyme-rate graphs using temperature, pH, substrate concentration and controlled variables

Covered syllabus points

C1.1.1—Enzymes as catalystsC1.1.2—Role in metabolismC1.1.3—Anabolic and catabolic reactionsC1.1.4—Enzymes as globular proteinsC1.1.5—Induced-fit bindingC1.1.6—Molecular motionC1.1.7—Relationships between structure and functionC1.1.8—Effects on enzyme activityC1.1.9—Measuring enzyme reactionsC1.1.10—Effect of enzymes on activation energy

C1.1 Enzymes and metabolism question 1

[Maximum number: 3]

Question (a)

(a)

Define metabolism.

[ 1 ]

Question (b)

(b)

Identify the following processes as either anabolism or catabolism by placing a tick (✓)(\checkmark) in the correct box.

Table for Question (b) — IB Biology SL
[ 2 ]

C1.1 Enzymes and metabolism question 2

[Maximum number: 1]

The diagram shows some of the metabolic processes taking place in a plant cell.

Figure for Question C1.1 Enzymes and metabolism question 2 — IB Biology SL

With reference to the diagram, identify one example of catabolism.

C1.1 Enzymes and metabolism question 3

[Maximum number: 3]

The image represents the structure of the enzyme Rubisco from common pea (Pisum sativum).

Figure for Question C1.1 Enzymes and metabolism question 3 — IB Biology SL

Question (a)

(a)

State a role of the active site of an enzyme.

[ 1 ]

Question (b)

(b)

Outline one factor that could affect the activity of Rubisco.

[ 2 ]
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