AQA GCSE Combined Science Biology - Paper 1 Exam
Questions and Answers Grade A+
What is the function of the nucleus? - Answer-Contains DNA to control the cell
What is the function of the cell membrane? - Answer-Controls entry and exit of
substances
What is the function of the cell wall? - Answer-Provides structure and support
What is the function of mitochondria? - Answer-Carry out respiration to release
energy
What is the function of ribosomes? - Answer-Protein synthesis
What is the function of chloroplasts? - Answer-Carry out photosynthesis
What is the function of a vacuole? - Answer-Contains cell sap
Define a prokaryote - Answer-A cell that does not have a nucleus
Define a eukaryote - Answer-A cell that has DNA in a nucleus
Name two cell structures that are in a eukaryote but not in a prokaryote - Answer-
Nucleus, mitochondria, chloroplasts
What is a plasmid? - Answer-A small loop of DNA in bacteria
What is a plant cell wall made from? - Answer-Cellulose
,How is DNA stored in a bacterial cell? - Answer-As a single, free-floating loop;
also on plasmids
What is differentiation? - Answer-The process by which cells become specialised
What is the equation for magnification? - Answer-Magnification = Image Size ÷
Actual Size
A photograph of a cell is 15mm long. It has a magnification of 1100x. What is the
actual size? - Answer-0.0136mm, or 13.6µm
A cell is 12µm wide. It is magnified by 450 times. How big is the image? -
Answer-5400µm, or 5.4mm
If the image of a virus is 1.2mm, and its actual size is 0.2µm, how much has it been
magnified by? - Answer-6000 times
Convert 38500µm into mm - Answer-38.5mm
How many µm are in 1mm? - Answer-1000
Write 17400m in standard form - Answer-1.74 x 10^4 m
Write 0.0034 in standard form - Answer-3.4 x 10^-3
How is a sperm cell adapted for its function? - Answer-It has a tail to swim to the
egg
, How is a nerve cell adapted for its function? - Answer-It has a long axon to
conduct impulses over long distances
How is a muscle cell adapted for its function? - Answer-It can contract to cause
movement
How is a root hair cell adapted for its function? - Answer-It has a large surface area
to increase osmosis of water
How is a xylem cell adapted for its function? - Answer-It has hollow ends to
transport water
How is a phloem cell adapted for its function? - Answer-It has sieve tubes to
transport sugars
What is a stem cell? - Answer-An undifferentiated cell that can differentiate to
become any type of specialised cell
Where are stem cells most commonly found in animals? - Answer-In embryos and
in bone marrow
What is meristem tissue? - Answer-Plant tissue containing stem cells
When are plant cells able to differentiate? - Answer-Throughout the whole life of
the plant
Questions and Answers Grade A+
What is the function of the nucleus? - Answer-Contains DNA to control the cell
What is the function of the cell membrane? - Answer-Controls entry and exit of
substances
What is the function of the cell wall? - Answer-Provides structure and support
What is the function of mitochondria? - Answer-Carry out respiration to release
energy
What is the function of ribosomes? - Answer-Protein synthesis
What is the function of chloroplasts? - Answer-Carry out photosynthesis
What is the function of a vacuole? - Answer-Contains cell sap
Define a prokaryote - Answer-A cell that does not have a nucleus
Define a eukaryote - Answer-A cell that has DNA in a nucleus
Name two cell structures that are in a eukaryote but not in a prokaryote - Answer-
Nucleus, mitochondria, chloroplasts
What is a plasmid? - Answer-A small loop of DNA in bacteria
What is a plant cell wall made from? - Answer-Cellulose
,How is DNA stored in a bacterial cell? - Answer-As a single, free-floating loop;
also on plasmids
What is differentiation? - Answer-The process by which cells become specialised
What is the equation for magnification? - Answer-Magnification = Image Size ÷
Actual Size
A photograph of a cell is 15mm long. It has a magnification of 1100x. What is the
actual size? - Answer-0.0136mm, or 13.6µm
A cell is 12µm wide. It is magnified by 450 times. How big is the image? -
Answer-5400µm, or 5.4mm
If the image of a virus is 1.2mm, and its actual size is 0.2µm, how much has it been
magnified by? - Answer-6000 times
Convert 38500µm into mm - Answer-38.5mm
How many µm are in 1mm? - Answer-1000
Write 17400m in standard form - Answer-1.74 x 10^4 m
Write 0.0034 in standard form - Answer-3.4 x 10^-3
How is a sperm cell adapted for its function? - Answer-It has a tail to swim to the
egg
, How is a nerve cell adapted for its function? - Answer-It has a long axon to
conduct impulses over long distances
How is a muscle cell adapted for its function? - Answer-It can contract to cause
movement
How is a root hair cell adapted for its function? - Answer-It has a large surface area
to increase osmosis of water
How is a xylem cell adapted for its function? - Answer-It has hollow ends to
transport water
How is a phloem cell adapted for its function? - Answer-It has sieve tubes to
transport sugars
What is a stem cell? - Answer-An undifferentiated cell that can differentiate to
become any type of specialised cell
Where are stem cells most commonly found in animals? - Answer-In embryos and
in bone marrow
What is meristem tissue? - Answer-Plant tissue containing stem cells
When are plant cells able to differentiate? - Answer-Throughout the whole life of
the plant
