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A level biology Edexcel A topic 2 questions
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Questions based on the A-level biology Edexcel A specification. Practice questions specific to topic 2.
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A level Biology Edexcel ATopic 2 - Practice Questions
1. What are the properties of gas exchange surfaces
in living organisms?
2. How is the rate of diffusion dependent on these
properties and calculated using Fick’s law?
3. How does the surface area to volume ratio impact
gas exchange?
4. How is the structure of the mammalian lung
adapted for efficient gas exchange?
5. What are the main components of cell
membranes?
6. What is the fluid mosaic model of cell membranes?
7. How can you investigate the effect of alcohol
concentration or temperature on membrane
permeability?
8. What is osmosis?
9. How does osmosis differ from diffusion?
10. What is meant by passive transport and active
transport?
, 11. What is facilitated diffusion?
12. What is active transport?
13. What role does ATP play in active transport?
14. What are endocytosis and exocytosis?
15. How do carrier and channel proteins participate
in membrane transport?
16. What is the basic structure of mononucleotides
and how do they form DNA and RNA?
17. What is complementary base pairing, and how
does it contribute to the DNA double helix?
18. What is the process of protein synthesis,
including the roles of RNA polymerase, translation,
mRNA, tRNA, ribosomes and start and stop
codons?
19. What are the roles of the DNA template strand,
mRNA codons, and tRNA anticodons in protein
synthesis?
20. Where does transpiration occur in protein
synthesis?
21. Where does translation occur in protein
synthesis?
22. What is the function of tRNA in translation?
23. How do tRNA anticodons ensure correct amino
acid placement?
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