AQA Biology paper 1 Questions And Answers 2025/2026
aerobic respiration - CORRECT ANSWER-an exothermic reaction in which glucose
is broken down using oxygen to produce carbon dioxide and water and release
energy for the cells
anaerobic respiration - CORRECT 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
exothermic reaction - CORRECT ANSWER-a reaction that transfers energy to the
environment
glycogen - CORRECT ANSWER-carbohydrate store in animals
lactic acid - CORRECT ANSWER-the end product of anaerobic respiration in animal
cells
oxygen debt - CORRECT ANSWER-the extra oxygen that must be taken into the
body after exercise has stopped to complete the aerobic respiration of lactic acid
,Mitochondria - CORRECT ANSWER-Organelle that is the site of respiration
Responses to exercise - CORRECT ANSWER-Heart rate increases, Breathing rate
increases, glycogen in muscles is converted to glucose
endothermic reaction - CORRECT ANSWER-a reaction that requires a transfer of
energy from the environment
glucose - CORRECT ANSWER-a simple sugar
limiting factors - CORRECT ANSWER-limit the rate of a reaction, for example
photosynthesis
photosynthesis - CORRECT ANSWER-the process by which plants make food using
carbon dioxide, water, and light
Reactants for photosynthesis - CORRECT ANSWER-water and carbon dioxide
Products of photosynthesis - CORRECT ANSWER-glucose and oxygen
Chloroplast - CORRECT ANSWER-Site of photosynthesis
, white blood cells - CORRECT ANSWER-Blood cells that perform the function of
destroying disease-causing microorganisms
Sperm cells - CORRECT 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 - CORRECT ANSWER-energy source for photosynthesis
aorta - CORRECT ANSWER-the artery that leaves the heart from the left ventricle
and carries oxygenated blood to the body
arteries - CORRECT ANSWER-blood vessels that carry blood away from the heart.
They usually carry oxygenated blood and have a pulse
atria - CORRECT ANSWER-the upper chambers of the heart
capillaries - CORRECT ANSWER-the smallest blood vessels. They run between
individual cells and have a wall that is only one cell thick
coronary arteries - CORRECT ANSWER-the blood vessels that supply oxygenated
blood to the heart muscle
aerobic respiration - CORRECT ANSWER-an exothermic reaction in which glucose
is broken down using oxygen to produce carbon dioxide and water and release
energy for the cells
anaerobic respiration - CORRECT 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
exothermic reaction - CORRECT ANSWER-a reaction that transfers energy to the
environment
glycogen - CORRECT ANSWER-carbohydrate store in animals
lactic acid - CORRECT ANSWER-the end product of anaerobic respiration in animal
cells
oxygen debt - CORRECT ANSWER-the extra oxygen that must be taken into the
body after exercise has stopped to complete the aerobic respiration of lactic acid
,Mitochondria - CORRECT ANSWER-Organelle that is the site of respiration
Responses to exercise - CORRECT ANSWER-Heart rate increases, Breathing rate
increases, glycogen in muscles is converted to glucose
endothermic reaction - CORRECT ANSWER-a reaction that requires a transfer of
energy from the environment
glucose - CORRECT ANSWER-a simple sugar
limiting factors - CORRECT ANSWER-limit the rate of a reaction, for example
photosynthesis
photosynthesis - CORRECT ANSWER-the process by which plants make food using
carbon dioxide, water, and light
Reactants for photosynthesis - CORRECT ANSWER-water and carbon dioxide
Products of photosynthesis - CORRECT ANSWER-glucose and oxygen
Chloroplast - CORRECT ANSWER-Site of photosynthesis
, white blood cells - CORRECT ANSWER-Blood cells that perform the function of
destroying disease-causing microorganisms
Sperm cells - CORRECT 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 - CORRECT ANSWER-energy source for photosynthesis
aorta - CORRECT ANSWER-the artery that leaves the heart from the left ventricle
and carries oxygenated blood to the body
arteries - CORRECT ANSWER-blood vessels that carry blood away from the heart.
They usually carry oxygenated blood and have a pulse
atria - CORRECT ANSWER-the upper chambers of the heart
capillaries - CORRECT ANSWER-the smallest blood vessels. They run between
individual cells and have a wall that is only one cell thick
coronary arteries - CORRECT ANSWER-the blood vessels that supply oxygenated
blood to the heart muscle
