AQA GCSE Biology TEST BANK EXAM LATEST WITH
ACTUAL QUESTIONS AND CORRECT VERIFIED
ANSWERS ALREADY GRADED A+ 100% GUARANTEED
PASS LATEST UPDATE 2026-2027 University of
Bedfordshire
What substances can't diffuse through cell membranes?
big molecules like starch and proteins
What are some examples of diffusion?
- the diffusion of oxygen into the cells of the body from the
bloodstream as the cells are respiring (and using up oxygen)
- the diffusion of carbon dioxide into actively photosynthesising plant cells
- the diffusion of simple sugars and amino acids for the gut
through cell membranes
When, and in which direction, will diffusion take place in solutions and in
gases?
- if two solutions are separated by a cell membrane, particles will
move from a region of high concentration to a region of low
concentration
- gases will also diffuse through the air from a region of high
concentration to a region of low concentration
,How is a leaf cell adapted to carry out photosynthesis?
- the leaf has mesophyll tissue
- the mesophyll cells contain chloroplasts which can photosynthesise
How are palisade cells adapted for photosynthesis?
- packed will chloroplasts for photosynthesis
- tall shape means a lot of surface area exposed down the side for
absorbing carbon dioxide from the air in the leaf
- they are grouped together at the top of the leaf so that they can
absorb more sunlight
How are red blood cells adapted to carry oxygen?
- concave shape gives a big surface area for absorbing oxygen. it
also helps them pass smoothly through capillaries to reach body
cells
- packed with haemoglobin which absorbs oxygen
- they have no nucleus to leave even more room for haemoglobin
How are sperm cells adapted for swimming to the egg?
- streamlined head and flagella to help it swim to the egg
- there are a lot of mitochondria in the cell to provide the energy needed
- carry enzymes in their heads to digest through the egg cell membrane
If a cell has many mitochondria...
it must need a lot of energy, e.g. muscle cell, sperm cell
,If a cell has many ribosomes...
it is making a lot of protein, e.g. gland cells which produce enzymes
If a cell has flagella..
it must be able to move, e.g. sperm cells
What is the process by which cells become specialised?
differentiation
What is meant by the term differentiation of cells?
- when cells start to divide they are very similar
- as the tissues develop the cells change to form particular function
What is a tissue?
a group of similar cells that work together to carry out a particular function
What sort of tissue can you find in mammals?
- Epithelial tissue: covers some parts of the body, e.g. the inside and
outside of the gut
- Muscular tissue: contracts to move whatever its attached to
- Glandular tissue: makes and secretes chemicals like hormones and
enzymes
, What is an organ?
a group of different tissues that work together to perform a certain
function, e.g. stomach
What tissues are the stomach made up of and what are their purposes?
- Epithelial tissue: covers the inside and outside of the stomach
- Muscular tissue: contracts the stomach wall to churn up the food
- Glandular tissue: produces digestive juices to digest food
What is an organ system?
a group of organs working together to perform a particular function, e.g.
the digestive system breaks down food
What organs does the digestive system include?
- glands
- the stomach
- the liver
- the small intestine
-the large intestine
What two glands produce digestive juices?
pancreas and salivary glands
ACTUAL QUESTIONS AND CORRECT VERIFIED
ANSWERS ALREADY GRADED A+ 100% GUARANTEED
PASS LATEST UPDATE 2026-2027 University of
Bedfordshire
What substances can't diffuse through cell membranes?
big molecules like starch and proteins
What are some examples of diffusion?
- the diffusion of oxygen into the cells of the body from the
bloodstream as the cells are respiring (and using up oxygen)
- the diffusion of carbon dioxide into actively photosynthesising plant cells
- the diffusion of simple sugars and amino acids for the gut
through cell membranes
When, and in which direction, will diffusion take place in solutions and in
gases?
- if two solutions are separated by a cell membrane, particles will
move from a region of high concentration to a region of low
concentration
- gases will also diffuse through the air from a region of high
concentration to a region of low concentration
,How is a leaf cell adapted to carry out photosynthesis?
- the leaf has mesophyll tissue
- the mesophyll cells contain chloroplasts which can photosynthesise
How are palisade cells adapted for photosynthesis?
- packed will chloroplasts for photosynthesis
- tall shape means a lot of surface area exposed down the side for
absorbing carbon dioxide from the air in the leaf
- they are grouped together at the top of the leaf so that they can
absorb more sunlight
How are red blood cells adapted to carry oxygen?
- concave shape gives a big surface area for absorbing oxygen. it
also helps them pass smoothly through capillaries to reach body
cells
- packed with haemoglobin which absorbs oxygen
- they have no nucleus to leave even more room for haemoglobin
How are sperm cells adapted for swimming to the egg?
- streamlined head and flagella to help it swim to the egg
- there are a lot of mitochondria in the cell to provide the energy needed
- carry enzymes in their heads to digest through the egg cell membrane
If a cell has many mitochondria...
it must need a lot of energy, e.g. muscle cell, sperm cell
,If a cell has many ribosomes...
it is making a lot of protein, e.g. gland cells which produce enzymes
If a cell has flagella..
it must be able to move, e.g. sperm cells
What is the process by which cells become specialised?
differentiation
What is meant by the term differentiation of cells?
- when cells start to divide they are very similar
- as the tissues develop the cells change to form particular function
What is a tissue?
a group of similar cells that work together to carry out a particular function
What sort of tissue can you find in mammals?
- Epithelial tissue: covers some parts of the body, e.g. the inside and
outside of the gut
- Muscular tissue: contracts to move whatever its attached to
- Glandular tissue: makes and secretes chemicals like hormones and
enzymes
, What is an organ?
a group of different tissues that work together to perform a certain
function, e.g. stomach
What tissues are the stomach made up of and what are their purposes?
- Epithelial tissue: covers the inside and outside of the stomach
- Muscular tissue: contracts the stomach wall to churn up the food
- Glandular tissue: produces digestive juices to digest food
What is an organ system?
a group of organs working together to perform a particular function, e.g.
the digestive system breaks down food
What organs does the digestive system include?
- glands
- the stomach
- the liver
- the small intestine
-the large intestine
What two glands produce digestive juices?
pancreas and salivary glands
