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Biology HL

SLHL

Chapter 2: Metabolism, Respiration and Photosynthesis

Follow energy and matter through enzyme-controlled pathways, ATP production in respiration, and carbon fixation in photosynthesis—from active-site collisions to chemiosmotic membranes.

Estimated chapter time: 425 minutes

IB syllabus: C1.1 · C1.2 · C1.3 · SL and HL

Chapter Topics

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  1. 1How this chapter works
    1. 1.1Metabolism as a network
    2. 1.2Four currencies
    3. 1.3Structure explains flow
  2. 2Enzymes and metabolic pathways
    1. 2.1Chains, cycles and coupling
    2. 2.2Induced fit and activation energy
    3. 2.3Temperature, pH and concentration
  3. 3Enzyme inhibition and control
    1. 3.1Competitive and non-competitive
    2. 3.2End-product and allosteric control
    3. 3.3Coenzymes and cofactors
  4. 4Cell respiration and ATP
    1. 4.1ATP couples energy
    2. 4.2Glycolysis shared beginning
    3. 4.3Anaerobic NAD regeneration
    4. 4.4Fermentation and respirometry
  5. 5Redox and glycolysis
    1. 5.1Oxidation and reduction
    2. 5.2Four phases of glycolysis
    3. 5.3Lipids and energy yield
  6. 6Aerobic respiration
    1. 6.1Mitochondrial organization
    2. 6.2Krebs cycle
    3. 6.3Electron transport and gradient
    4. 6.4Respiratory yield
  7. 7Light and pigments
    1. 7.1Light to chemical energy
    2. 7.2Absorption and action spectra
    3. 7.3Pigment chromatography
  8. 8Rates and limiting factors
    1. 8.1Measuring photosynthesis
    2. 8.2Limiting factors
    3. 8.3Gross, net and compensation
    4. 8.4Greenhouse optimization
  9. 9Advanced photosynthesis
    1. 9.1Chloroplast compartments
    2. 9.2Photolysis, electron flow and ATP
    3. 9.3Calvin cycle carbon fixation
    4. 9.4Light-independent, not dark
  10. 10Chapter synthesis
    1. 10.1Compare chemiosmosis
    2. 10.2Matter cycles; energy flows
    3. 10.3Solve by conservation

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