Aqa a level biology 456 - Study guides, Class notes & Summaries
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AQA A Level Biology 4/5/6 mark questions (2024) (Certified Answers)
- Exam (elaborations) • 33 pages • 2024
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Many different substances enter and leave a cell by crossing its cell surface membrane. Describe 
how substances can cross a cell surface membrane. (5) 1 (Simple / facilitated) diffusion from 
high to low 
concentration / down concentration gradient; 
2 Small / non-polar / lipid-soluble molecules pass via phospholipids / bilayer; 
OR 
Large / polar / water-soluble molecules go through proteins; 
3 Water moves by osmosis / from high water potential to low water potential / from less to more 
n...
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2024 AQA A LEVEL BIOLOGY 4/5/6 MARK EXAM QUESTIONS WITH ANSWERS
- Exam (elaborations) • 15 pages • 2024
- Available in package deal
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- $14.99
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2024 AQA A LEVEL BIOLOGY 4/5/6 MARK EXAM QUESTIONS WITH ANSWERS
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AQA A Level Biology 4/5/6 mark questions (2022/2023) (Certified Answers)
- Exam (elaborations) • 33 pages • 2024
- Available in package deal
-
- $9.99
- + learn more
Many different substances enter and leave a cell by crossing its cell surface membrane. Describe 
how substances can cross a cell surface membrane. (5) 1 (Simple / facilitated) diffusion from 
high to low 
concentration / down concentration gradient; 
2 Small / non-polar / lipid-soluble molecules pass via phospholipids / bilayer; 
OR 
Large / polar / water-soluble molecules go through proteins; 
3 Water moves by osmosis / from high water potential to low water potential / from less to more 
nega...
-
AQA A Level Biology 4/5/6 mark questions (2022/2023) (Certified Answers)
- Exam (elaborations) • 33 pages • 2024
- Available in package deal
-
- $9.99
- + learn more
Many different substances enter and leave a cell by crossing its cell surface membrane. Describe 
how substances can cross a cell surface membrane. (5) 1 (Simple / facilitated) diffusion from 
high to low 
concentration / down concentration gradient; 
2 Small / non-polar / lipid-soluble molecules pass via phospholipids / bilayer; 
OR 
Large / polar / water-soluble molecules go through proteins; 
3 Water moves by osmosis / from high water potential to low water potential / from less to more 
nega...
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