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AQA A LEVEL BIOLOGY Study guides, Class notes & Summaries
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AQA A LEVEL BIOLOGY PAPER 1,7402/1|PAPER 2,7402/2|PAPER 3,7402/3
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AQA A LEVEL BIOLOGY PAPER 1,7402/1|PAPER 2,7402/2|PAPER 3,7402/3 VERSION 1.0 FINAL QUESTION PAPERS & MERGED MARKING SCHEME | JUNE 2023|SUCCESS GUARANTEED
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AQA A LEVEL BIOLOGY 7402/2 PAPER 2 MARK SCHEME
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AQA A LEVEL BIOLOGY 7402/2 PAPER 2 MARK SCHEME
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A vaccine can be used to produce immunity. Describe how memory cells are important in this process. (3) - CORRECT ANSWERS important because when individual is in contact with virus again, antibodies can be produced at a faster rate in a secondary immun
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A vaccine can be used to produce immunity. Describe how memory cells are important 
in this process. (3) - CORRECT ANSWERS important because when individual is in 
contact with virus again, antibodies can be produced at a faster rate in a secondary 
immune response, and so the pathogen can be destroyed faster. 
abiotic - CORRECT ANSWERS non-living 
artery structure - CORRECT ANSWERS thick muscle layer so that they can dilate and 
contract to smooth blood flow. 
thick elastic layer so artery ...
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AQA A-Level Biology Questions with Answers | Graded A
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AQA A-Level Biology Questions with Answers | Graded A 
Glucose is absorbed from the lumen of the small intestine into epithelial cells. Explain 
how the transport of sodium ions is involved in the absorption of glucose by epithelial 
cells. (5 marks) [Unit 1, June 16] - Correct Answer ️️ -1. Na+ ions leave epithelial cell 
and enter blood; 
2. (Transport out is by) active transport / pump / via carrier protein using ATP; 
3. So, Na+ conc. in cell is lower than in lumen (of gut); 
4. Sodium/N...
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FULL BUNDLE;;; AQA A level Biology Bundled Exams with Complete Solutions 100% Verified
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Biology AQA A Level Common Questions and Answers 100% Solved

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AQA A-Level Biology. 3.2 – Cells Text Questions and Answers 100% Solved

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AQA A-Level Biology - Topic 3 Questions and Answers 100% Solved

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AQA A-Level Biology – Enzymes Test Questions and Answers 100% Solved

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AQA A-Level Biology - Topic 3 Questions and Answers 100% Solved
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AQA A-Level Biology - Topic 3 Questions 
and Answers 100% Solved 
Smaller organisms have a ........... surface area to volume ratio Higher 
How do single called organisms exchange substances? Diffuse directly into or out of the cell 
across the cell surface membrane 
Give 2 reasons why in multicellular organisms, diffusion across outer membrane would be too 
slow? 1. Some cells deep within body- big distance between them and outside 
2. Larger animals have low surface area to volume ratio- dif...
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AQA A-Level Biology – Enzymes Test Questions and Answers 100% Solved
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AQA A-Level Biology – Enzymes Test 
Questions and Answers 100% Solved 
Activation Energy 
The minimum energy required for successful collisions to result in a reaction 
Enzyme Function 
Lowers the activation energy for a reaction to start, behaves as a catalyst 
Enzyme Structure 
Globular proteins that have a functional region known as an active site 
Active Site 
Functional region on an enzyme that is complimentary to substrates 
Complimentary 
Of a similar shape to one another
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AQA A-level Biology - Topic 4 Questions and Answers 100% Solved
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AQA A-level Biology - Topic 4 Questions 
and Answers 100% Solved 
Define variation Differences that exist between individuals 
In what ways can variation be caused? It can be caused by genetic factors, such as alleles 
from mutations. 
It can also be caused by the environment, such as climate. 
Most variation is caused by a combination of genetic factors and environmental factors 
Why is it impossible to study a whole population? Because it is too large and would take too 
long. Instead, scient...
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AQA A Level Biology 4/5/6 mark questions (2024/2025) Exam Questions and Answers 100% Solved
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AQA A Level Biology 4/5/6 mark 
questions (2024/2025) Exam Questions 
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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; 
Small / non-polar / lipid-soluble molecules pass via phospholipids / bilayer; 
OR 
Large / polar / water-soluble molecules go through proteins; 
Water ...
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AQA A level Biology - Topic 6 - survival and response questions and answers 100% Solved
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AQA A level Biology - Topic 6 - 
survival and response questions and 
answers 100% Solved 
What is a stimulus? A change in the environment of an organism 
What is a tactic response? Directional movement in response to a stimulus 
What is a kinetic response? Non directional random movement in response to a stimulus 
What is a positive and negative taxis? Positive taxis- organism moves towards stimulus 
Negative taxis - organism moves away from stimulus 
What Are receptors? Detect stimuli- can ...
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AQA A-level Biology paper 1 Questions and Answers 100% Solved
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AQA A-level Biology paper 1 
Questions and Answers 100% Solved 
large molecules often contain carbon. why? they can readily form bonds with other carbon 
atoms. this forms a 'backbone'. other atoms can then attach. 
describe benedicts test for reducing sugars add equal volumes of the sugar sample and 
benedicts reagent. heat the mixture in a water bath for 5 minutes. brick red precipitate will form. 
what is a reducing sugar? a sugar that can reduce (give electrons to) another chemical. 
des...