AQA GCSE Combined Science Biology - Paper 1
UPDATED QUESTIONS WITH CORRECT ANSWERS.
A cell is 12µm wide. It is magnified by 450 times. How big is the image? - CORRECT
ANSWER✅✅5400µm, or 5.4mm
A photograph of a cell is 15mm long. It has a magnification of 1100x. What is the actual size? - CORRECT
ANSWER✅✅0.0136mm, or 13.6µm
Convert 38500µm into mm - CORRECT ANSWER✅✅38.5mm
Define a benign tumour - CORRECT ANSWER✅✅A group of cancerous cells that will not spread
Define a eukaryote - CORRECT ANSWER✅✅A cell that has DNA in a nucleus
Define a malignant tumour - CORRECT ANSWER✅✅Tumour that can spread to cause secondary
tumours
Define a pathogen - CORRECT ANSWER✅✅A disease-causing microorganism that can spread from
person to person
Define a prokaryote - CORRECT ANSWER✅✅A cell that does not have a nucleus
Define a tissue - CORRECT ANSWER✅✅A group of cells with similar structure and function
Define accuracy - CORRECT ANSWER✅✅Measurements that are close to the true value
Define active transport - CORRECT ANSWER✅✅The movement of particles from a low concentration to
a high concentration against a concentration gradient, using energy
,Define an enzyme - CORRECT ANSWER✅✅A biological catalyst that carries out metabolic reactions in
living organisms
Define an organ - CORRECT ANSWER✅✅A group of tissues working together to perform a function
Define cancer - CORRECT ANSWER✅✅Uncontrolled cell division leading to a tumour
Define denature - CORRECT ANSWER✅✅When an enzyme cannot work because its active site has lost
its specific shape so the substrate no longer fits
Define diffusion - CORRECT ANSWER✅✅The movement of particles from a high concentration to a low
concentration down a concentration gradient
Define metabolism - CORRECT ANSWER✅✅All of the chemical reactions in a cell or in a body
Define metastasis - CORRECT ANSWER✅✅When a group of cells breaks away from a tumour and
travels in the blood to form a secondary tumour elsewhere
Define osmosis - CORRECT ANSWER✅✅The movement of water from a high water potential to a low
water potential across a partially permeable membrane
Define phagocytosis - CORRECT ANSWER✅✅When a white blood cell engulfs a pathogen and digests it
using enzymes
Define respiration - CORRECT ANSWER✅✅A chemical reaction used to release energy from glucose
Deine an organ system - CORRECT ANSWER✅✅A group of organs working together
, Describe the effect of increasing carbon dioxide concentration on photosynthesis - CORRECT
ANSWER✅✅Increasing carbon dioxide concentration increases the rate of photosynthesis, until
another factor becomes limiting
Describe the effect of increasing light intesity on photosynthesis - CORRECT ANSWER✅✅Increasing
light intensity increases the rate of photosynthesis, until another factor becomes limiting
Describe the effect of increasing temperature on photosynthesis - CORRECT ANSWER✅✅Increasing
temperature increases the rate of photosynthesis, unless it gets too hot when the enzymes denature
Describe the effect of increasing the amount of chlorophyll on photosynthesis - CORRECT
ANSWER✅✅Increasing chlorophyll increases the rate of photosynthesis, until another factor becomes
limiting
Describe the relationship between light intensity and rate of photosynthesis - CORRECT
ANSWER✅✅The greater the light intensity, the faster the rate of photosynthesis
Explain one example of active transport in animals - CORRECT ANSWER✅✅Absorption of glucose in the
small intestine
Explain one example of active transport in plants - CORRECT ANSWER✅✅Absorption of mineral ions in
root hair cells
For what purposes do organisms need to release energy by respiration? - CORRECT
ANSWER✅✅Chemical reactions to build larger molecules, movement, keeping warm
Give 1 example of a fungal disease - CORRECT ANSWER✅✅Rose Black Spot
Give 1 examples of a protist disease - CORRECT ANSWER✅✅Malaria
Give 2 examples of bacterial diseases - CORRECT ANSWER✅✅Salmonella, Gonorrhea
UPDATED QUESTIONS WITH CORRECT ANSWERS.
A cell is 12µm wide. It is magnified by 450 times. How big is the image? - CORRECT
ANSWER✅✅5400µm, or 5.4mm
A photograph of a cell is 15mm long. It has a magnification of 1100x. What is the actual size? - CORRECT
ANSWER✅✅0.0136mm, or 13.6µm
Convert 38500µm into mm - CORRECT ANSWER✅✅38.5mm
Define a benign tumour - CORRECT ANSWER✅✅A group of cancerous cells that will not spread
Define a eukaryote - CORRECT ANSWER✅✅A cell that has DNA in a nucleus
Define a malignant tumour - CORRECT ANSWER✅✅Tumour that can spread to cause secondary
tumours
Define a pathogen - CORRECT ANSWER✅✅A disease-causing microorganism that can spread from
person to person
Define a prokaryote - CORRECT ANSWER✅✅A cell that does not have a nucleus
Define a tissue - CORRECT ANSWER✅✅A group of cells with similar structure and function
Define accuracy - CORRECT ANSWER✅✅Measurements that are close to the true value
Define active transport - CORRECT ANSWER✅✅The movement of particles from a low concentration to
a high concentration against a concentration gradient, using energy
,Define an enzyme - CORRECT ANSWER✅✅A biological catalyst that carries out metabolic reactions in
living organisms
Define an organ - CORRECT ANSWER✅✅A group of tissues working together to perform a function
Define cancer - CORRECT ANSWER✅✅Uncontrolled cell division leading to a tumour
Define denature - CORRECT ANSWER✅✅When an enzyme cannot work because its active site has lost
its specific shape so the substrate no longer fits
Define diffusion - CORRECT ANSWER✅✅The movement of particles from a high concentration to a low
concentration down a concentration gradient
Define metabolism - CORRECT ANSWER✅✅All of the chemical reactions in a cell or in a body
Define metastasis - CORRECT ANSWER✅✅When a group of cells breaks away from a tumour and
travels in the blood to form a secondary tumour elsewhere
Define osmosis - CORRECT ANSWER✅✅The movement of water from a high water potential to a low
water potential across a partially permeable membrane
Define phagocytosis - CORRECT ANSWER✅✅When a white blood cell engulfs a pathogen and digests it
using enzymes
Define respiration - CORRECT ANSWER✅✅A chemical reaction used to release energy from glucose
Deine an organ system - CORRECT ANSWER✅✅A group of organs working together
, Describe the effect of increasing carbon dioxide concentration on photosynthesis - CORRECT
ANSWER✅✅Increasing carbon dioxide concentration increases the rate of photosynthesis, until
another factor becomes limiting
Describe the effect of increasing light intesity on photosynthesis - CORRECT ANSWER✅✅Increasing
light intensity increases the rate of photosynthesis, until another factor becomes limiting
Describe the effect of increasing temperature on photosynthesis - CORRECT ANSWER✅✅Increasing
temperature increases the rate of photosynthesis, unless it gets too hot when the enzymes denature
Describe the effect of increasing the amount of chlorophyll on photosynthesis - CORRECT
ANSWER✅✅Increasing chlorophyll increases the rate of photosynthesis, until another factor becomes
limiting
Describe the relationship between light intensity and rate of photosynthesis - CORRECT
ANSWER✅✅The greater the light intensity, the faster the rate of photosynthesis
Explain one example of active transport in animals - CORRECT ANSWER✅✅Absorption of glucose in the
small intestine
Explain one example of active transport in plants - CORRECT ANSWER✅✅Absorption of mineral ions in
root hair cells
For what purposes do organisms need to release energy by respiration? - CORRECT
ANSWER✅✅Chemical reactions to build larger molecules, movement, keeping warm
Give 1 example of a fungal disease - CORRECT ANSWER✅✅Rose Black Spot
Give 1 examples of a protist disease - CORRECT ANSWER✅✅Malaria
Give 2 examples of bacterial diseases - CORRECT ANSWER✅✅Salmonella, Gonorrhea
