IB Biology HL 1.2.1 ATP distributes energy Question Bank
Practise IB Biology HL 1.2.1 by explaining how ATP to ADP conversion distributes manageable energy for cellular work.
- Syllabus
- First assessment 2025
- Course
- Biology HL
- Level
- HL
Exam points
- Explain how ATP to ADP conversion distributes manageable energy for active transport and other metabolic tasks.
- Use ATP solubility, reversibility and rapid regeneration to justify its role as cellular energy currency.
C1.2.1—ATP distributes energy question 1
[Maximum number: 3]
All cells require a supply of energy and can transform the energy that they obtain in different ways.
Explain the properties of ATP that make it useful for distributing energy within cells.
a. used as a source/(temporary) store of energy / is the energy currency of the cell;
b. releases energy when converted to ADP/when a phosphate is removed;
c. amount of energy released can be used/sufficient for (many metabolic) tasks;
d. active transport/another valid example;
e. ATP to ADP conversion is reversible / ATP can be regenerated from ADP;
f. can be produced in different ways/using energy from different sources/by aerobic or anaerobic respiration;
g. stable within cell so does not release energy prematurely/before needed;
h. small molecule/soluble so can move easily/quickly (through the cell);
i. cannot diffuse through membranes so is not lost from cell/to the environment;
h. The idea of ATP being small/soluble
must be there along with its
moveability.
3
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