3/25/25, 5:29 AQA GCSE Biology |
PM
AQA GCSE BIOLOGY EXAM QUESTIONS AND ANSWERS WITH
COMPLETE SOLUTIONS VERIFIED
Terms in this set (202)
In which type of cell would you find a plant cell
cell wall, chloroplasts and a
vacuole?
- cytoplasm
- nucleus
What does an animal cell have? - ribosomes
- cell membrane
- mitochondria
What does the nucleus do? contains genetic material that controls the activities of the cell
gel-like substance where most of the chemical reactions happen. It
What is the cytoplasm?
contains enzymes which control these chemical reactions
What is the cell membrane holds the cell together and controls what goes in and out
these are where most of the reactions for respiration take place.
What happens in the mitochondria?
Respiration releases energy that the cell needs to work
What happens in the ribosomes? these are where proteins are made in the cell
What does a bacterial cell NOT have? a nucleus- genetic material floats in the cytoplasm
What is a yeast cell an example of? a single cell organism
- nucleus
- cytoplasm
What does a yeast cell have?
- cell membrane
- surrounding cell wall
How is a leaf cell different from a leaf cells have chloroplasts and a cellulose cell wall. yeast cells have neither
yeast cell?
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7
, 3/25/25, 5:29 AQA GCSE Biology |
PM
the SPREADING OUT of PARTICLES from an area of HIGH CONCENTRATION
to an area of LOW CONCENTRATION
What is the definition of diffusion?
or
the NET MOVEMENT of PARTICLES down a CONCENTRATION GRADIENT
What substances can diffuse through small molecules like oxygen, glucose, amino acids and water
cell membranes?
What substances can't diffuse big molecules like starch and proteins
through cell membranes?
- the diffusion of oxygen into the cells of the body from the bloodstream
as the cells are respiring (and using up oxygen)
What are some examples of diffusion?
- the diffusion of carbon dioxide into actively photosynthesising plant cells
- the diffusion of simple sugars and amino acids for the gut through cell membranes
- if two solutions are separated by a cell membrane, particles will
move from a region of high concentration to a region of low
When, and in which direction, will
concentration
diffusion take place in solutions and
in gases?
- 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 - the leaf has mesophyll tissue
out photosynthesis? - the mesophyll cells contain chloroplasts which can photosynthesise
- packed will chloroplasts for photosynthesis
- tall shape means a lot of surface area exposed down the side for
How are palisade cells adapted for
absorbing carbon dioxide from the air in the leaf
photosynthesis?
- they are grouped together at the top of the leaf so that they can
absorb more sunlight
- concave shape gives a big surface area for absorbing oxygen. it also
How are red blood cells adapted to helps them pass smoothly through capillaries to reach body cells
carry oxygen? - packed with haemoglobin which absorbs oxygen
- they have no nucleus to leave even more room for haemoglobin
- streamlined head and flagella to help it swim to the egg
How are sperm cells adapted for
- there are a lot of mitochondria in the cell to provide the energy needed
swimming to the egg?
- 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 differentiation
become specialised?
What is meant by the term - when cells start to divide they are very similar
differentiation of cells? - 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
- Epithelial tissue: covers some parts of the body, e.g. the inside and
outside of the gut
What sort of tissue can you find in
mammals? - Muscular tissue: contracts to move whatever its attached to
- Glandular tissue: makes and secretes chemicals like hormones and enzymes
2/
7
PM
AQA GCSE BIOLOGY EXAM QUESTIONS AND ANSWERS WITH
COMPLETE SOLUTIONS VERIFIED
Terms in this set (202)
In which type of cell would you find a plant cell
cell wall, chloroplasts and a
vacuole?
- cytoplasm
- nucleus
What does an animal cell have? - ribosomes
- cell membrane
- mitochondria
What does the nucleus do? contains genetic material that controls the activities of the cell
gel-like substance where most of the chemical reactions happen. It
What is the cytoplasm?
contains enzymes which control these chemical reactions
What is the cell membrane holds the cell together and controls what goes in and out
these are where most of the reactions for respiration take place.
What happens in the mitochondria?
Respiration releases energy that the cell needs to work
What happens in the ribosomes? these are where proteins are made in the cell
What does a bacterial cell NOT have? a nucleus- genetic material floats in the cytoplasm
What is a yeast cell an example of? a single cell organism
- nucleus
- cytoplasm
What does a yeast cell have?
- cell membrane
- surrounding cell wall
How is a leaf cell different from a leaf cells have chloroplasts and a cellulose cell wall. yeast cells have neither
yeast cell?
1/
7
, 3/25/25, 5:29 AQA GCSE Biology |
PM
the SPREADING OUT of PARTICLES from an area of HIGH CONCENTRATION
to an area of LOW CONCENTRATION
What is the definition of diffusion?
or
the NET MOVEMENT of PARTICLES down a CONCENTRATION GRADIENT
What substances can diffuse through small molecules like oxygen, glucose, amino acids and water
cell membranes?
What substances can't diffuse big molecules like starch and proteins
through cell membranes?
- the diffusion of oxygen into the cells of the body from the bloodstream
as the cells are respiring (and using up oxygen)
What are some examples of diffusion?
- the diffusion of carbon dioxide into actively photosynthesising plant cells
- the diffusion of simple sugars and amino acids for the gut through cell membranes
- if two solutions are separated by a cell membrane, particles will
move from a region of high concentration to a region of low
When, and in which direction, will
concentration
diffusion take place in solutions and
in gases?
- 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 - the leaf has mesophyll tissue
out photosynthesis? - the mesophyll cells contain chloroplasts which can photosynthesise
- packed will chloroplasts for photosynthesis
- tall shape means a lot of surface area exposed down the side for
How are palisade cells adapted for
absorbing carbon dioxide from the air in the leaf
photosynthesis?
- they are grouped together at the top of the leaf so that they can
absorb more sunlight
- concave shape gives a big surface area for absorbing oxygen. it also
How are red blood cells adapted to helps them pass smoothly through capillaries to reach body cells
carry oxygen? - packed with haemoglobin which absorbs oxygen
- they have no nucleus to leave even more room for haemoglobin
- streamlined head and flagella to help it swim to the egg
How are sperm cells adapted for
- there are a lot of mitochondria in the cell to provide the energy needed
swimming to the egg?
- 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 differentiation
become specialised?
What is meant by the term - when cells start to divide they are very similar
differentiation of cells? - 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
- Epithelial tissue: covers some parts of the body, e.g. the inside and
outside of the gut
What sort of tissue can you find in
mammals? - Muscular tissue: contracts to move whatever its attached to
- Glandular tissue: makes and secretes chemicals like hormones and enzymes
2/
7
