AQA Biology Paper 1 Exam
Practice Questions WITH
Answers 100% PASS
Explain why plants are not able to rely on diffusion to absorb mineral ions
from the soil-ANSWER-The concentration of minerals is higher inside the
plant cells than in the soil (1)
So the minerals would move out the plant cells by diffusion (1)
Give 4 features of an effective gas exchange surface in an animal-ANSWER-
large surface area
well ventilated
thin membrane
efficient blood supply
Emphysema weakens and breaks down the walls of alveoli
A person with emphysema may suffer from lower energy levels during
physical excercise. Suggest and explain the cause of this symptom-
ANSWER-As the walls of the alveoli are broken down the surface area in the
lungs is reduced (1), so less oxygen can be diffused into the blood (1). This
, means that their body cells are not getting enough oxygen for respiration
during exercise, resulting in low energy levels (1)
Describe and explain how the structure of the small intestine is adapted for
absorbing the products of digestion-ANSWER-It is covered with villi (1)
which increases the surface area for absorption (1)
There is a good blood supply (1) maintaining the concentration gradient so
absorption can happen quickly (1)
The villi have a single layer of surface cells (1) which give a short diffusion
pathway
Using your knowledge of digestive enzymes and where they are produced in
the body, fully outline the processes involved in the digestion of a meal
containing carbohydrates, proteins and lipids (6)-ANSWER-Carbohydrate
digestion begins in the mouth where amylase is produced by the salivary
glands
It also occurs in the small intestine, which produces its own supply of
amylase and also contains amylase produced by the pancreas
Amylase converts the carbohydrates into sugars
Protein is digested in the stomach where proteases are produced
Protein digestion also occurs in the small intestine which produces
proteases and also contains proteases produced by the pancreas
Proteases convert protein into amino acids
© 2026 Copyright. All Rights Reserved. This document is
protected by copyright law, Copyrighted By Katelyn Whitman
Practice Questions WITH
Answers 100% PASS
Explain why plants are not able to rely on diffusion to absorb mineral ions
from the soil-ANSWER-The concentration of minerals is higher inside the
plant cells than in the soil (1)
So the minerals would move out the plant cells by diffusion (1)
Give 4 features of an effective gas exchange surface in an animal-ANSWER-
large surface area
well ventilated
thin membrane
efficient blood supply
Emphysema weakens and breaks down the walls of alveoli
A person with emphysema may suffer from lower energy levels during
physical excercise. Suggest and explain the cause of this symptom-
ANSWER-As the walls of the alveoli are broken down the surface area in the
lungs is reduced (1), so less oxygen can be diffused into the blood (1). This
, means that their body cells are not getting enough oxygen for respiration
during exercise, resulting in low energy levels (1)
Describe and explain how the structure of the small intestine is adapted for
absorbing the products of digestion-ANSWER-It is covered with villi (1)
which increases the surface area for absorption (1)
There is a good blood supply (1) maintaining the concentration gradient so
absorption can happen quickly (1)
The villi have a single layer of surface cells (1) which give a short diffusion
pathway
Using your knowledge of digestive enzymes and where they are produced in
the body, fully outline the processes involved in the digestion of a meal
containing carbohydrates, proteins and lipids (6)-ANSWER-Carbohydrate
digestion begins in the mouth where amylase is produced by the salivary
glands
It also occurs in the small intestine, which produces its own supply of
amylase and also contains amylase produced by the pancreas
Amylase converts the carbohydrates into sugars
Protein is digested in the stomach where proteases are produced
Protein digestion also occurs in the small intestine which produces
proteases and also contains proteases produced by the pancreas
Proteases convert protein into amino acids
© 2026 Copyright. All Rights Reserved. This document is
protected by copyright law, Copyrighted By Katelyn Whitman
