AQA GCSE COMBINED SCIENCE: TRILOGY
8464/B/1H BIOLOGY PAPER 1H PAPER
& MARK SCHEME FINAL TEST 2026
QUESTIONS WITH CORRECT ANSWERS
GRADED A+
◍ Abiotic factors.
Answer: Non living e.g light, temp, water, wind and oxygen
◍ What is the nervous system?.
Answer: It is a system that allows you to react to your surroundings.
◍ Thyroid.
Answer: Controls basil metabolic rate
◍ Phenotype.
Answer: Tells us the characteristics caused by the alleles. A dominant allele
will show in the phenotype even if there is only one copy
◍ Predators.
Answer: Consumers that eat and kill other animals
◍ Retina.
Answer: Contains receptors that detect colour
◍ Pupil.
Answer: Hole that light passes through
◍ Adult cell cloning.
Answer: 1. Take a body cell and remove the nucleus2. Take an egg cell and
remove the nucleus3. Put the body cell nucleus in the egg cell3. Give the
, cell an electric shock so it splits4. Insert the embryo that forms into a womb
◍ Name the hormone that is released if blood sugar is too low..
Answer: Glucagon
◍ Phototropism.
Answer: A plant growing towards a light.-Auxins produced at the top of a
shoot and it triggers cell growth-Light causes auxins to concentrate on the
darker side-Cells on darker side grow faster
◍ Sexual reproduction.
Answer: 1. Chromosomes are copied2. Cells divide to form 4 daughter
cells3. Chromosomes are single4. Cells are fertilised 5. The cell has
chromosome pairs6. Mitosis occurs to form an embryoIt provides variation
and therfore provides a survival advantage
◍ Why are gametes produced in meiosis genetically different?.
Answer: Because chromosomes are shuffled up during meiosis and each
gamete only gets half of them at random
◍ Type 2 Diabetes.
Answer: Body cells don't respond to the secreted insulin. Control diet and
take exercise. Obesity is a risk factor.
◍ Explain Antibiotic Resistance.
Answer: Bacteria DNA RANDOMLY MUTATES. Taking antibiotics
creates a selective pressure as the environment changes. Selects the resistant
strain as better adapted. This can lead to antibiotic resistant strains. More
likely to survive and reproduce. Gene for antibiotic resistance increases in
the population.
◍ Nerves and Hormones.
Answer: Nerves fast Hormones slownerves quick Hormones long
lastingnerves specific Hormones general
◍ Sclera.
Answer: Protects the eye
,◍ Ethene.
Answer: Controls cell division and the ripening of fruits. Trigger bananas to
ripen
◍ Genetic Engineering.
Answer: Identify the gene and isolate with enzymes.Transfer to a vector
(plasmid or virus)Transfer gene into the desired organism at an early stage.It
may be harmful to crops and it may damage the environment but it can be
used to treat disaese
◍ How can feeding relationships within a community be represented?.
Answer: With food chains
◍ Cuttings.
Answer: 1. Remove a small growing part (meristem at shoot)2. Put it in
rooting powder 3. Replant it4. Grow the cloneBeen used for 100 years
◍ Embryo Screening.
Answer: Embryos are tested for certain conditions and only normal embryos
are imprinted. It is very expensive, many embryos are destroyed and may
lead to screening for desired characteristics such as intelligence or beauty.
◍ 2 pros & 2 cons of GM crops.
Answer: +increased yield=more food+already being grown, not
problematic-worries on human health/safety/allergies-long term
effects-unplanned problems that could could pass on to future generations
◍ Fossils.
Answer: Remains of organisms from millions of years ago which are found
in rocks. They are formed when organisms don't decay, they are replaced by
minerals or from footprints and roots.
◍ What 3 things developed/supported Darwin's Theory of Evolution?.
Answer: -Discovery of genetics (Mendel/Watson and Crick)-Looking at
fossils-changes in organism over time-Antibiotic resistant bacteria-supports
evolution by natural selection
, ◍ Practical: Decay.
Answer: Independent = TemperatureDependent = Time1. Put 5cm3 lipase
solution in a test tube2. Add 3 drops of cresol red, 5cm of milk and 7cm
sodium carbonate solution in a different tube3. Put in 20C water bath and
wait for constant temp4. Transfer 1cm lipase into milk and stir5. Measure
time for it to go from purple to yellow6. Repeat at different temperatures
◍ Methods for conserving fish stocks at a sustainable level.
Answer: 1. Control of net size - larger nets mean small, young fish can
escape and continue to breed2. Fishing quotas - to ensure areas are not
completely overfished
◍ Medulla.
Answer: Controls heart and breathing rate
◍ Cystic Fibrosis.
Answer: Disorder of the cell membranes. Recessive conditions meaning you
need a homozygous small pair to get it e.g. cc
◍ Food Security.
Answer: Factors affecting:- Increasing population-New pests and
pathogens-Weather change-War
◍ What happens when the concentration of water in the blood is too high.
I. e. the Blood is dilute/LESS concentrated..
Answer: Receptors in the hypothalamus detects the water content is too
high. The coordinator in the brain receives the information and coordinates a
response. The pituitary gland produced LESS ADH, which makes the
kidney tubule LESS permeable. This means that LESS water is reabsorbed
into the bloodstream. The kidneys produce a large volume of dilute urine.
◍ How do humans reduce biodiversity? (4).
Answer: 1. Waste management2. Land use3. Deforestation4. Global
warming
◍ Competition.
8464/B/1H BIOLOGY PAPER 1H PAPER
& MARK SCHEME FINAL TEST 2026
QUESTIONS WITH CORRECT ANSWERS
GRADED A+
◍ Abiotic factors.
Answer: Non living e.g light, temp, water, wind and oxygen
◍ What is the nervous system?.
Answer: It is a system that allows you to react to your surroundings.
◍ Thyroid.
Answer: Controls basil metabolic rate
◍ Phenotype.
Answer: Tells us the characteristics caused by the alleles. A dominant allele
will show in the phenotype even if there is only one copy
◍ Predators.
Answer: Consumers that eat and kill other animals
◍ Retina.
Answer: Contains receptors that detect colour
◍ Pupil.
Answer: Hole that light passes through
◍ Adult cell cloning.
Answer: 1. Take a body cell and remove the nucleus2. Take an egg cell and
remove the nucleus3. Put the body cell nucleus in the egg cell3. Give the
, cell an electric shock so it splits4. Insert the embryo that forms into a womb
◍ Name the hormone that is released if blood sugar is too low..
Answer: Glucagon
◍ Phototropism.
Answer: A plant growing towards a light.-Auxins produced at the top of a
shoot and it triggers cell growth-Light causes auxins to concentrate on the
darker side-Cells on darker side grow faster
◍ Sexual reproduction.
Answer: 1. Chromosomes are copied2. Cells divide to form 4 daughter
cells3. Chromosomes are single4. Cells are fertilised 5. The cell has
chromosome pairs6. Mitosis occurs to form an embryoIt provides variation
and therfore provides a survival advantage
◍ Why are gametes produced in meiosis genetically different?.
Answer: Because chromosomes are shuffled up during meiosis and each
gamete only gets half of them at random
◍ Type 2 Diabetes.
Answer: Body cells don't respond to the secreted insulin. Control diet and
take exercise. Obesity is a risk factor.
◍ Explain Antibiotic Resistance.
Answer: Bacteria DNA RANDOMLY MUTATES. Taking antibiotics
creates a selective pressure as the environment changes. Selects the resistant
strain as better adapted. This can lead to antibiotic resistant strains. More
likely to survive and reproduce. Gene for antibiotic resistance increases in
the population.
◍ Nerves and Hormones.
Answer: Nerves fast Hormones slownerves quick Hormones long
lastingnerves specific Hormones general
◍ Sclera.
Answer: Protects the eye
,◍ Ethene.
Answer: Controls cell division and the ripening of fruits. Trigger bananas to
ripen
◍ Genetic Engineering.
Answer: Identify the gene and isolate with enzymes.Transfer to a vector
(plasmid or virus)Transfer gene into the desired organism at an early stage.It
may be harmful to crops and it may damage the environment but it can be
used to treat disaese
◍ How can feeding relationships within a community be represented?.
Answer: With food chains
◍ Cuttings.
Answer: 1. Remove a small growing part (meristem at shoot)2. Put it in
rooting powder 3. Replant it4. Grow the cloneBeen used for 100 years
◍ Embryo Screening.
Answer: Embryos are tested for certain conditions and only normal embryos
are imprinted. It is very expensive, many embryos are destroyed and may
lead to screening for desired characteristics such as intelligence or beauty.
◍ 2 pros & 2 cons of GM crops.
Answer: +increased yield=more food+already being grown, not
problematic-worries on human health/safety/allergies-long term
effects-unplanned problems that could could pass on to future generations
◍ Fossils.
Answer: Remains of organisms from millions of years ago which are found
in rocks. They are formed when organisms don't decay, they are replaced by
minerals or from footprints and roots.
◍ What 3 things developed/supported Darwin's Theory of Evolution?.
Answer: -Discovery of genetics (Mendel/Watson and Crick)-Looking at
fossils-changes in organism over time-Antibiotic resistant bacteria-supports
evolution by natural selection
, ◍ Practical: Decay.
Answer: Independent = TemperatureDependent = Time1. Put 5cm3 lipase
solution in a test tube2. Add 3 drops of cresol red, 5cm of milk and 7cm
sodium carbonate solution in a different tube3. Put in 20C water bath and
wait for constant temp4. Transfer 1cm lipase into milk and stir5. Measure
time for it to go from purple to yellow6. Repeat at different temperatures
◍ Methods for conserving fish stocks at a sustainable level.
Answer: 1. Control of net size - larger nets mean small, young fish can
escape and continue to breed2. Fishing quotas - to ensure areas are not
completely overfished
◍ Medulla.
Answer: Controls heart and breathing rate
◍ Cystic Fibrosis.
Answer: Disorder of the cell membranes. Recessive conditions meaning you
need a homozygous small pair to get it e.g. cc
◍ Food Security.
Answer: Factors affecting:- Increasing population-New pests and
pathogens-Weather change-War
◍ What happens when the concentration of water in the blood is too high.
I. e. the Blood is dilute/LESS concentrated..
Answer: Receptors in the hypothalamus detects the water content is too
high. The coordinator in the brain receives the information and coordinates a
response. The pituitary gland produced LESS ADH, which makes the
kidney tubule LESS permeable. This means that LESS water is reabsorbed
into the bloodstream. The kidneys produce a large volume of dilute urine.
◍ How do humans reduce biodiversity? (4).
Answer: 1. Waste management2. Land use3. Deforestation4. Global
warming
◍ Competition.
