IB Biology HL C1.2.2 Life Processes Using Atp Questions
Practise IB Biology HL 1.2.2 by relating ATP hydrolysis to movement, transport, biosynthesis and molecular motors across cells.
- Syllabus
- First assessment 2025
- Course
- Biology HL
- Level
- HL
Exam points
- Explain how ATP hydrolysis supplies energy for active transport, including membrane pumps that move ions against concentration gradients.
- Relate ATP use to movement and molecular motors, such as actin–myosin contraction, chromosome movement and cilia/flagella.
- Identify ATP-dependent anabolic synthesis and other cellular work, linking ATP conversion to the specific life process.
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IB Biology HL C1.2.2 Life Processes Using Atp Questions question 1
[Maximum number: 5]
Monosaccharides can be used to make polysaccharides, and can also be combined with other types of carbon compound to form molecules such as nucleotides.
Outline, with examples, the wide range of uses of adenosine triphosphate (ATP) in cells.
a. movement of cells/chromosomes and example of movement;
b. movement of flagellum/cilium;
c. endocytosis/exocytosis;
d. detachment of myosin heads from actin filaments / myosin heads change their angle/become cocked;
e. active transport and example of use of active transport;
f. anabolic reactions / polymerization example / example of synthesizing macromolecules;
g. generation of heat and to provide optimum temperature for enzyme activity / in homeostasis / to maintain body temperature;
h. phosphorylation of substrates in glycolysis;
i. phosphorylation of substrates in photosynthesis light-
independent reaction/Calvin cycle;
For a. accept descriptions of cells (e.g. amoeboid phagocyte
moving to site of infection) or chromosomes (e.g. anaphase,
chromosomes moving to opposite poles).
For d. ignore 'muscle contraction'.
For e. E.g. sodium-potassium pump (in neurons) / maintaining resting potential in neurons / generation of root pressure / villus epithelial cells / selective reabsorption in kidney.
For e. do not accept transport of large molecules as example.
For f. accept examples such as DNA replication / transcription / translation / and other examples of formation of
macromolecules.
For h. accept phosphorylation of glucose (to glucose-6-phosphate) or phosphorylation of fructose-6-phosphate (to
fructose 1,6-biphosphate).
For i. accept formation of triose phosphate and formation of ribulose bisphosphate (regeneration of RuBP).
5
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