AQA AS BIOLOGY PAPER 1 FINAL EXAM 2026
QUESTIONS WITH COMPLETE SOLUTIONS
GRADED A+
◉ anaerobic respiration. Answer: an exothermic reaction in which
glucose is broken down in the absence of oxygen to produce lactic
acid in animals and ethanol and carbon dioxide in plants and yeast.
A small amount of energy is transferred for the cells
◉ Glucagon. Answer: A hormone secreted by the pancreatic alpha
cells that increases blood glucose concentration
◉ exothermic reaction. Answer: a reaction that transfers energy to
the environment
◉ glycogen. Answer: carbohydrate store in animals
◉ lactic acid. Answer: the end product of anaerobic respiration in
animal cells
◉ oxygen debt. Answer: the extra oxygen that must be taken into the
body after exercise has stopped to complete the aerobic respiration
of lactic acid
,◉ Mitochondria. Answer: Organelle that is the site of respiration
◉ Responses to exercise. Answer: Heart rate increases, Breathing
rate increases, glycogen in muscles is converted to glucose
◉ endothermic reaction. Answer: a reaction that requires a transfer
of energy from the environment
◉ glucose. Answer: a simple sugar
◉ limiting factors. Answer: limit the rate of a reaction, for example
photosynthesis
◉ photosynthesis. Answer: the process by which plants make food
using carbon dioxide, water, and light
◉ Reactants for photosynthesis. Answer: water and carbon dioxide
◉ Products of photosynthesis. Answer: glucose and oxygen
◉ Chloroplast. Answer: Site of photosynthesis
, ◉ white blood cells. Answer: Blood cells that perform the function of
destroying disease-causing microorganisms
◉ Sperm cells. Answer: It has a long tail and a streamlined head to
help it swim. There are a lot of mitochondria in the cell to provide
the energy needed. It also carries enzymes in its head to digest
through the egg cell membrane.
◉ light. Answer: energy source for photosynthesis
◉ aorta. Answer: the artery that leaves the heart from the left
ventricle and carries oxygenated blood to the body
◉ arteries. Answer: blood vessels that carry blood away from the
heart. They usually carry oxygenated blood and have a pulse
◉ atria. Answer: the upper chambers of the heart
◉ capillaries. Answer: the smallest blood vessels. They run between
individual cells and have a wall that is only one cell thick
◉ coronary arteries. Answer: the blood vessels that supply
oxygenated blood to the heart muscle
QUESTIONS WITH COMPLETE SOLUTIONS
GRADED A+
◉ anaerobic respiration. Answer: an exothermic reaction in which
glucose is broken down in the absence of oxygen to produce lactic
acid in animals and ethanol and carbon dioxide in plants and yeast.
A small amount of energy is transferred for the cells
◉ Glucagon. Answer: A hormone secreted by the pancreatic alpha
cells that increases blood glucose concentration
◉ exothermic reaction. Answer: a reaction that transfers energy to
the environment
◉ glycogen. Answer: carbohydrate store in animals
◉ lactic acid. Answer: the end product of anaerobic respiration in
animal cells
◉ oxygen debt. Answer: the extra oxygen that must be taken into the
body after exercise has stopped to complete the aerobic respiration
of lactic acid
,◉ Mitochondria. Answer: Organelle that is the site of respiration
◉ Responses to exercise. Answer: Heart rate increases, Breathing
rate increases, glycogen in muscles is converted to glucose
◉ endothermic reaction. Answer: a reaction that requires a transfer
of energy from the environment
◉ glucose. Answer: a simple sugar
◉ limiting factors. Answer: limit the rate of a reaction, for example
photosynthesis
◉ photosynthesis. Answer: the process by which plants make food
using carbon dioxide, water, and light
◉ Reactants for photosynthesis. Answer: water and carbon dioxide
◉ Products of photosynthesis. Answer: glucose and oxygen
◉ Chloroplast. Answer: Site of photosynthesis
, ◉ white blood cells. Answer: Blood cells that perform the function of
destroying disease-causing microorganisms
◉ Sperm cells. Answer: It has a long tail and a streamlined head to
help it swim. There are a lot of mitochondria in the cell to provide
the energy needed. It also carries enzymes in its head to digest
through the egg cell membrane.
◉ light. Answer: energy source for photosynthesis
◉ aorta. Answer: the artery that leaves the heart from the left
ventricle and carries oxygenated blood to the body
◉ arteries. Answer: blood vessels that carry blood away from the
heart. They usually carry oxygenated blood and have a pulse
◉ atria. Answer: the upper chambers of the heart
◉ capillaries. Answer: the smallest blood vessels. They run between
individual cells and have a wall that is only one cell thick
◉ coronary arteries. Answer: the blood vessels that supply
oxygenated blood to the heart muscle
