AQA GCSE COMBINED SCIENCE: TRILOGY
8464/B/1H BIOLOGY PAPER 1H PAPER
& MARK SCHEME COMPREHENSIVE
STUDY GUIDE 2026 FULL QUESTIONS AND
SOLUTIONS GRADED A+
◍ bypass.
Answer: a medical operation on the heart in which blood is directed along a
different route so that it does not flow through a part that is damaged or
blocked
◍ State two benefits of an electron microscope over a light microscope.
Answer: Greater resolving power, Higher magnification
◍ What type of cells are Prokaryotic cells?.
Answer: Bacteria cells
◍ How can bacteria make a person feel ill?.
Answer: By producing toxins that damage cells and tissues
◍ What is a protist?.
Answer: Single-celled eukaryotes
◍ What is the role of guard cells and stomate in leaves?.
Answer: To control gas exchange and water loss
◍ What does plasma do?.
Answer: It's the liquid that carries everything in the blood
◍ What is the equation for anaerobic respiration?.
Answer: Glucose --> Lactic Acid
,◍ Bacteria vs Virus.
Answer: Bacteria are living organisms and virus are not
◍ Problems with embryonic stem cells.
Answer: -Human rights debate-Slow, expensive, unpredictable-Possibly
cause cancer-Potentially infected with viruses
◍ What are the three things that new drugs should be tested for?.
Answer: Toxicity, efficacy, dose
◍ How does water move across cell membranes?.
Answer: By osmosis
◍ Where does aspirin come from?.
Answer: Willow
◍ water loss from the leaves.
Answer: -stromata open-carbon dioxide moves in-oxygen moves out
◍ What is metabolism?.
Answer: The sum of all the reactions in a cell or the body
◍ Aorta.
Answer: The large arterial trunk that carries blood from the heart to be
distributed by branch arteries through the body.
◍ What is the equation for anaerobic respiration in plant and yeast cells?.
Answer: Glucose --> Ethanol + Carbon Dioxide
◍ The speed lipase breaks down fats and converts them is increased with.
Answer: surface area
◍ How do viruses reproduce inside the body?.
Answer: Inside cells using the cells machinery to replicates themselves and
then causing the cell to burst to release the new viruses
◍ What is anaerobic respiration?.
Answer: Where respiration takes place without oxygen
, ◍ exothermic reaction.
Answer: a chemical reaction in which heat is released to the surroundings
◍ How do you calculate magnification in a microscope?.
Answer: Magnification = size of image/size of real object
◍ What are the basic building blocks of all living organisms?.
Answer: Cells
◍ What is aerobic respiration?.
Answer: Where respiration takes place using oxygen
◍ Which insect spreads malaria?.
Answer: Mosquito
◍ What process moves substances into and out of a cell across a cell
membrane?.
Answer: Diffusion
◍ Name the three ways that pathogens can be spread.
Answer: Direct contact, by water, by air
◍ Where are lipases produced?.
Answer: Break down fats into glycerol and fatty acids
◍ What is photosynthesis?.
Answer: An endothermic reaction in which energy is transferred from the
environment to the chloroplasts by light
◍ Name three specialised animal cells.
Answer: Sperm, Nerve, Muscle
◍ What is salmonella?.
Answer: Food poisoning spread by bacteria ingested in food or on food
prepared in unhygienic conditions
◍ How does the nose help protect the body?.
Answer: The hairs and mucus in the nose trap particles that contain
pathogens
8464/B/1H BIOLOGY PAPER 1H PAPER
& MARK SCHEME COMPREHENSIVE
STUDY GUIDE 2026 FULL QUESTIONS AND
SOLUTIONS GRADED A+
◍ bypass.
Answer: a medical operation on the heart in which blood is directed along a
different route so that it does not flow through a part that is damaged or
blocked
◍ State two benefits of an electron microscope over a light microscope.
Answer: Greater resolving power, Higher magnification
◍ What type of cells are Prokaryotic cells?.
Answer: Bacteria cells
◍ How can bacteria make a person feel ill?.
Answer: By producing toxins that damage cells and tissues
◍ What is a protist?.
Answer: Single-celled eukaryotes
◍ What is the role of guard cells and stomate in leaves?.
Answer: To control gas exchange and water loss
◍ What does plasma do?.
Answer: It's the liquid that carries everything in the blood
◍ What is the equation for anaerobic respiration?.
Answer: Glucose --> Lactic Acid
,◍ Bacteria vs Virus.
Answer: Bacteria are living organisms and virus are not
◍ Problems with embryonic stem cells.
Answer: -Human rights debate-Slow, expensive, unpredictable-Possibly
cause cancer-Potentially infected with viruses
◍ What are the three things that new drugs should be tested for?.
Answer: Toxicity, efficacy, dose
◍ How does water move across cell membranes?.
Answer: By osmosis
◍ Where does aspirin come from?.
Answer: Willow
◍ water loss from the leaves.
Answer: -stromata open-carbon dioxide moves in-oxygen moves out
◍ What is metabolism?.
Answer: The sum of all the reactions in a cell or the body
◍ Aorta.
Answer: The large arterial trunk that carries blood from the heart to be
distributed by branch arteries through the body.
◍ What is the equation for anaerobic respiration in plant and yeast cells?.
Answer: Glucose --> Ethanol + Carbon Dioxide
◍ The speed lipase breaks down fats and converts them is increased with.
Answer: surface area
◍ How do viruses reproduce inside the body?.
Answer: Inside cells using the cells machinery to replicates themselves and
then causing the cell to burst to release the new viruses
◍ What is anaerobic respiration?.
Answer: Where respiration takes place without oxygen
, ◍ exothermic reaction.
Answer: a chemical reaction in which heat is released to the surroundings
◍ How do you calculate magnification in a microscope?.
Answer: Magnification = size of image/size of real object
◍ What are the basic building blocks of all living organisms?.
Answer: Cells
◍ What is aerobic respiration?.
Answer: Where respiration takes place using oxygen
◍ Which insect spreads malaria?.
Answer: Mosquito
◍ What process moves substances into and out of a cell across a cell
membrane?.
Answer: Diffusion
◍ Name the three ways that pathogens can be spread.
Answer: Direct contact, by water, by air
◍ Where are lipases produced?.
Answer: Break down fats into glycerol and fatty acids
◍ What is photosynthesis?.
Answer: An endothermic reaction in which energy is transferred from the
environment to the chloroplasts by light
◍ Name three specialised animal cells.
Answer: Sperm, Nerve, Muscle
◍ What is salmonella?.
Answer: Food poisoning spread by bacteria ingested in food or on food
prepared in unhygienic conditions
◍ How does the nose help protect the body?.
Answer: The hairs and mucus in the nose trap particles that contain
pathogens
