3/25/25, 5:44 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 cell plant 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 contains
What is the cytoplasm?
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. Respiration
What happens in the mitochondria?
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 yeast leaf cells have chloroplasts and a cellulose cell wall. yeast cells have neither
cell?
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, 3/25/25, 5:44 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 cell small molecules like oxygen, glucose, amino acids and water
membranes?
What substances can't diffuse through cell big molecules like starch and proteins
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 concentration
When, and in which direction, will 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 out - the leaf has mesophyll tissue
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 absorbing carbon
How are palisade cells adapted for
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 helps them
How are red blood cells adapted to carry pass smoothly through capillaries to reach body cells
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 swimming
- there are a lot of mitochondria in the cell to provide the energy needed
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 become differentiation
specialised?
What is meant by the term differentiation of - when cells start to divide they are very similar
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/
6
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 cell plant 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 contains
What is the cytoplasm?
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. Respiration
What happens in the mitochondria?
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 yeast leaf cells have chloroplasts and a cellulose cell wall. yeast cells have neither
cell?
1/
6
, 3/25/25, 5:44 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 cell small molecules like oxygen, glucose, amino acids and water
membranes?
What substances can't diffuse through cell big molecules like starch and proteins
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 concentration
When, and in which direction, will 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 out - the leaf has mesophyll tissue
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 absorbing carbon
How are palisade cells adapted for
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 helps them
How are red blood cells adapted to carry pass smoothly through capillaries to reach body cells
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 swimming
- there are a lot of mitochondria in the cell to provide the energy needed
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 become differentiation
specialised?
What is meant by the term differentiation of - when cells start to divide they are very similar
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/
6
