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IB Biology HL C1.1.13 Hl Cyclical and Linear Pathways in Metabolism Questions

Compare linear glycolysis with cyclical Krebs and Calvin pathways, focusing on whether acceptors or starting molecules are regenerated in IB Biology HL C1.1.13.

Syllabus
First assessment 2025
Course
Biology HL
Level
HL

Exam points

  • Distinguish linear pathways that run from substrate to product from cyclical pathways that regenerate an acceptor or initial molecule.
  • Classify pathway descriptions such as glycolysis, Krebs cycle and Calvin cycle by whether intermediates are recycled or lead to an end product.

IB Biology HL C1.1.13 Hl Cyclical and Linear Pathways in Metabolism Questions question 1

[Maximum number: 1]

Laccase is an enzyme that has the ability to decompose synthetic dyes used in the production of clothing and thus could potentially help reduce synthetic dye pollution.

An experiment was performed in which laccase was immobilized in alginate beads to determine the effectiveness of laccase immobilization in decolorizing the dye crystal violet. The graph shows the effect of laccase concentration on relative decolorization activity of the immobilized laccase. Error bars represent ± SD.

Figure for Question IB Biology HL C1.1.13 Hl Cyclical and Linear Pathways in Metabolism Questions question 1 — IB Biology HL

Distinguish between processes involved in cyclical and linear metabolic pathways.

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