2024 AQA GCSE COMBINED SCIENCE /ALL VERSIONS &
SUBJECTS (GRADE A+)
What kind of circulatory system do humans have? - CORRECT ANSWERS -A double
circulatory system
What do stents do? - CORRECT ANSWERS -Keep narrowed or blocked arteries open.
What do statins do? - CORRECT ANSWERS -Reduce cholesterol levels reducing the
risk of coronary heart disease.
What is the resting heart rate controlled by? - CORRECT ANSWERS -A group of cells
in the right atrium form a natural pacemaker.
What are artificial pacemakers used for? - CORRECT ANSWERS -They're used to
correct irregularities in the heart rhythm.
What are artificial hearts used for? - CORRECT ANSWERS -Keep patients alive while
they wait for a transplant or to allow their own heart to rest.
What do the alveoli do? - CORRECT ANSWERS -Provide a large surface area and a
rich supply of blood capillaries, so gas can diffuse efficiently.
What does xylem tissue do? - CORRECT ANSWERS -Transports water and mineral
ions from the roots to the stems and leaves.
What does phloem do? - CORRECT ANSWERS -Transport dissolved sugars from the
leaves to the rest of the plant.
What is transpiration? - CORRECT ANSWERS -Loss of water vapour from the leaves
through the stomata (open for carbon dioxide for photosynthesis). Guard cells control
this.
What are communicable diseases caused by? - CORRECT ANSWERS -Pathogens
(microorganisms) which include bacteria, viruses, fungi and protists.
How do Bacteria make you feel ill - CORRECT ANSWERS -Produce toxins
How do viruses make you ill? - CORRECT ANSWERS -Live and reproduce inside your
cells, causing cell damage
Name four ways in which the spread of disease can be prevented - CORRECT
ANSWERS -Simple Hygiene, Destroying Vectors, Vaccination and Isolation
, Measles Virus - CORRECT ANSWERS -Droplet infection.
Causes fever and a rash
Isolation and Vaccination
HIV - CORRECT ANSWERS -Flu-like illness
Attacks body's immune cells
AIDS occurs when the system become so damaged it can't deal with cancers or
infections/
Tobacco Mosaic Virus - CORRECT ANSWERS -Spread by contact and vectors
Damages leaves, reduces photosynthesis. No treatment.
Spread controlled by field hygiene and pest control.
What do all cells have? - CORRECT ANSWERS -Nucleus, Cytoplasm, Cell Membrane,
Mitochondria, Ribosomes
What do only plant and algal cells have? - CORRECT ANSWERS -A Cellulose Cell Wall
(sometimes Chloroplasts and a Vacuole)
What do Eukaryotic Cells have? - CORRECT ANSWERS -Cell Membrane, Cytoplasm,
Genetic Material enclosed in a nucleus,
What are Prokaryotic Cells? - CORRECT ANSWERS -Cytoplasm and a cell membrane
surrounded by a cell wall. Genetic Material is not in a nucleus, but in a single DNA loop.
May also contain plasmids. E.g. Bacteria
What is Diffusion? - CORRECT ANSWERS -Diffusion is the spreading out of particles of
any substance in a solution or gas, resulting in a net movement from an area of higher
concentration to an area of lower concentration.
Give four examples of dissolved substances which move in and out of cells by diffusion
- CORRECT ANSWERS -Glucose, Urea, Oxygen, Carbon Dioxide.
What is Osmosis? - CORRECT ANSWERS -The movement of water from a dilute to a
more concentrated solute solution through a partially permeable membrane.
What is Active Transport? - CORRECT ANSWERS -The movement of substances from
a more dilute solution to a more concentrated solution. This uses energy from food in
respiration.
What is a tissue? - CORRECT ANSWERS -A group of cells with a similar structure and
function
SUBJECTS (GRADE A+)
What kind of circulatory system do humans have? - CORRECT ANSWERS -A double
circulatory system
What do stents do? - CORRECT ANSWERS -Keep narrowed or blocked arteries open.
What do statins do? - CORRECT ANSWERS -Reduce cholesterol levels reducing the
risk of coronary heart disease.
What is the resting heart rate controlled by? - CORRECT ANSWERS -A group of cells
in the right atrium form a natural pacemaker.
What are artificial pacemakers used for? - CORRECT ANSWERS -They're used to
correct irregularities in the heart rhythm.
What are artificial hearts used for? - CORRECT ANSWERS -Keep patients alive while
they wait for a transplant or to allow their own heart to rest.
What do the alveoli do? - CORRECT ANSWERS -Provide a large surface area and a
rich supply of blood capillaries, so gas can diffuse efficiently.
What does xylem tissue do? - CORRECT ANSWERS -Transports water and mineral
ions from the roots to the stems and leaves.
What does phloem do? - CORRECT ANSWERS -Transport dissolved sugars from the
leaves to the rest of the plant.
What is transpiration? - CORRECT ANSWERS -Loss of water vapour from the leaves
through the stomata (open for carbon dioxide for photosynthesis). Guard cells control
this.
What are communicable diseases caused by? - CORRECT ANSWERS -Pathogens
(microorganisms) which include bacteria, viruses, fungi and protists.
How do Bacteria make you feel ill - CORRECT ANSWERS -Produce toxins
How do viruses make you ill? - CORRECT ANSWERS -Live and reproduce inside your
cells, causing cell damage
Name four ways in which the spread of disease can be prevented - CORRECT
ANSWERS -Simple Hygiene, Destroying Vectors, Vaccination and Isolation
, Measles Virus - CORRECT ANSWERS -Droplet infection.
Causes fever and a rash
Isolation and Vaccination
HIV - CORRECT ANSWERS -Flu-like illness
Attacks body's immune cells
AIDS occurs when the system become so damaged it can't deal with cancers or
infections/
Tobacco Mosaic Virus - CORRECT ANSWERS -Spread by contact and vectors
Damages leaves, reduces photosynthesis. No treatment.
Spread controlled by field hygiene and pest control.
What do all cells have? - CORRECT ANSWERS -Nucleus, Cytoplasm, Cell Membrane,
Mitochondria, Ribosomes
What do only plant and algal cells have? - CORRECT ANSWERS -A Cellulose Cell Wall
(sometimes Chloroplasts and a Vacuole)
What do Eukaryotic Cells have? - CORRECT ANSWERS -Cell Membrane, Cytoplasm,
Genetic Material enclosed in a nucleus,
What are Prokaryotic Cells? - CORRECT ANSWERS -Cytoplasm and a cell membrane
surrounded by a cell wall. Genetic Material is not in a nucleus, but in a single DNA loop.
May also contain plasmids. E.g. Bacteria
What is Diffusion? - CORRECT ANSWERS -Diffusion is the spreading out of particles of
any substance in a solution or gas, resulting in a net movement from an area of higher
concentration to an area of lower concentration.
Give four examples of dissolved substances which move in and out of cells by diffusion
- CORRECT ANSWERS -Glucose, Urea, Oxygen, Carbon Dioxide.
What is Osmosis? - CORRECT ANSWERS -The movement of water from a dilute to a
more concentrated solute solution through a partially permeable membrane.
What is Active Transport? - CORRECT ANSWERS -The movement of substances from
a more dilute solution to a more concentrated solution. This uses energy from food in
respiration.
What is a tissue? - CORRECT ANSWERS -A group of cells with a similar structure and
function
