AQA GCSE Biology-Questions with Correct Answers|Verified
In which type of cell would you find a cell wall, chloroplasts and a vacuole? - ✔✔plant cell
What does an animal cell have? - ✔✔- cytoplasm
- nucleus
- ribosomes
- cell membrane
- mitochondria
What does the nucleus do? - ✔✔contains genetic material that controls the activities of the
cell
What is the cytoplasm? - ✔✔gel-like substance where most of the chemical reactions
happen. It contains enzymes which control these chemical reactions
What is the cell membrane - ✔✔holds the cell together and controls what goes in and out
What happens in the mitochondria? - ✔✔these are where most of the reactions for
respiration take place. 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
What does a yeast cell have? - ✔✔- nucleus
- cytoplasm
- cell membrane
,- surrounding cell wall
How is a leaf cell different from a yeast cell? - ✔✔leaf cells have chloroplasts and a cellulose
cell wall. yeast cells have neither
What is the definition of diffusion? - ✔✔the SPREADING OUT of PARTICLES from an area of
HIGH CONCENTRATION to an area of LOW CONCENTRATION
or
the NET MOVEMENT of PARTICLES down a CONCENTRATION GRADIENT
What substances can diffuse through cell membranes? - ✔✔small molecules like oxygen,
glucose, amino acids and water
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
In which type of cell would you find a cell wall, chloroplasts and a vacuole? - ✔✔plant cell
What does an animal cell have? - ✔✔- cytoplasm
- nucleus
- ribosomes
- cell membrane
- mitochondria
What does the nucleus do? - ✔✔contains genetic material that controls the activities of the
cell
What is the cytoplasm? - ✔✔gel-like substance where most of the chemical reactions
happen. It contains enzymes which control these chemical reactions
What is the cell membrane - ✔✔holds the cell together and controls what goes in and out
What happens in the mitochondria? - ✔✔these are where most of the reactions for
respiration take place. 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
What does a yeast cell have? - ✔✔- nucleus
- cytoplasm
- cell membrane
,- surrounding cell wall
How is a leaf cell different from a yeast cell? - ✔✔leaf cells have chloroplasts and a cellulose
cell wall. yeast cells have neither
What is the definition of diffusion? - ✔✔the SPREADING OUT of PARTICLES from an area of
HIGH CONCENTRATION to an area of LOW CONCENTRATION
or
the NET MOVEMENT of PARTICLES down a CONCENTRATION GRADIENT
What substances can diffuse through cell membranes? - ✔✔small molecules like oxygen,
glucose, amino acids and water
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
