IB Biology HL B1.1.5 Polysaccharides As Energy Storage Questions
Practise IB Biology HL B1.1.5 by linking 1,4/1,6 glycosidic branching and insolubility to starch and glycogen energy stores.
- Syllabus
- First assessment 2025
- Course
- Biology HL
- Level
- HL
Exam points
- Describe starch and glycogen as alpha-glucose polymers, including 1,4/1,6 linkages and high branching in glycogen.
- Explain how compact, insoluble polysaccharides store glucose energy in plants, animals and fungi.
- Explain how hydrolysis of stored polysaccharides mobilises glucose for respiration.
IB Biology HL B1.1.5 Polysaccharides As Energy Storage Questions question 1
[Maximum number: 4]
Outline how and where energy is stored in plants.
glucose (from photosynthesis) stored as starch;
starch stored (as granules) in chloroplast/in plastids;
(starch stored) in seeds/storage roots/stem tubers;
stored as lipids/oils;
(lipid/oils storage) in seeds;
lipids store twice as much energy per gram as starch;
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