AQA GCSE BIOLOGY - PAPER 1 2025 LATEST
EXAM.QUESTIONS AND ANSWERS VERIFIED. GRADE A+
GUARANTEED
What do capillaries do? - - ANS✔️---Arteries branch into capillaries
-They are really tiny - too small to see
-They carry blood really close to every cell in the body to exchange
substances with them
-They have permeable walls - substances can diffuse in and out
-They supply food and oxygen and take away waste like carbon
dioxide
-Their walls are one cell thick - this increases the rate of diffusion
What does a nucleus do? - - ANS✔️--It contains genetic material and
controls the activities of the cell
,What does cytoplasm do? - - ANS✔️--It's a gel-like substance where
most of the chemical reactions happen. It contains enzymes that
control these chemical reactions
What do mitochondria do? - - ANS✔️--These are where most of the
reactions for aerobic respiration occur. Respiration transfers energy
that the cell needs to work
What do ribosomes do? - - ANS✔️--This is where protein synthesis takes
place - where proteins are made in the cell
What do cell walls do? - - ANS✔️--They are made of cellulose and they
support and strengthen the cell
What does a vacuole do? - - ANS✔️--It contains cell sap and helps
maintain the shape of the cell
What do chloroplasts do? - - ANS✔️--This is where photosynthesis
occurs, which makes food for the plant. They contain chlorophyll - a
green pigment - which absorbs light needed for photosynthesis
,What do bacterial cells contain? - - ANS✔️--Cytoplasm, cell membrane,
cell wall, flagella, ribosomes, mitochondria, slime capsule, plasmids
(small rings of DNA) and a single circular strand of DNA that floats
freely in the cytoplasm
What do bacterial cells NOT contain? - - ANS✔️--A nucleus
What is the equation for magnification? - - ANS✔️--Image size divided by
actual size
What is differentiation? - - ANS✔️--The process by which a cell changes
to become specialised for its job
What are undifferentiated cells called? - - ANS✔️--Stem cells
What are sperm cells specialised for and how are they specialised? - -
ANS✔️--Reproduction - they transport the male DNA to the female DNA
, -It has a flagella and a streamlined head to help it swim towards the
egg
-There are lots of mitochondria in the cell to provide the energy
needed
-It carries enzymes in its head to help digest through the egg cell
membranes
What are nerve cells specialised for and how are they specialised? - -
ANS✔️--Rapid signalling - they carry electrical signals from one part of
the body to another
-They are long to cover more distance
-They have branched connections at their ends to connect to other
nerve cells and form a network throughout the body
What are muscle cells specialised for and how are they specialised? - -
ANS✔️--Contraction - they need to contract quickly
-They are long so they have space to contract
-They contain lots of mitochondria to generate the energy needed for
contraction
EXAM.QUESTIONS AND ANSWERS VERIFIED. GRADE A+
GUARANTEED
What do capillaries do? - - ANS✔️---Arteries branch into capillaries
-They are really tiny - too small to see
-They carry blood really close to every cell in the body to exchange
substances with them
-They have permeable walls - substances can diffuse in and out
-They supply food and oxygen and take away waste like carbon
dioxide
-Their walls are one cell thick - this increases the rate of diffusion
What does a nucleus do? - - ANS✔️--It contains genetic material and
controls the activities of the cell
,What does cytoplasm do? - - ANS✔️--It's a gel-like substance where
most of the chemical reactions happen. It contains enzymes that
control these chemical reactions
What do mitochondria do? - - ANS✔️--These are where most of the
reactions for aerobic respiration occur. Respiration transfers energy
that the cell needs to work
What do ribosomes do? - - ANS✔️--This is where protein synthesis takes
place - where proteins are made in the cell
What do cell walls do? - - ANS✔️--They are made of cellulose and they
support and strengthen the cell
What does a vacuole do? - - ANS✔️--It contains cell sap and helps
maintain the shape of the cell
What do chloroplasts do? - - ANS✔️--This is where photosynthesis
occurs, which makes food for the plant. They contain chlorophyll - a
green pigment - which absorbs light needed for photosynthesis
,What do bacterial cells contain? - - ANS✔️--Cytoplasm, cell membrane,
cell wall, flagella, ribosomes, mitochondria, slime capsule, plasmids
(small rings of DNA) and a single circular strand of DNA that floats
freely in the cytoplasm
What do bacterial cells NOT contain? - - ANS✔️--A nucleus
What is the equation for magnification? - - ANS✔️--Image size divided by
actual size
What is differentiation? - - ANS✔️--The process by which a cell changes
to become specialised for its job
What are undifferentiated cells called? - - ANS✔️--Stem cells
What are sperm cells specialised for and how are they specialised? - -
ANS✔️--Reproduction - they transport the male DNA to the female DNA
, -It has a flagella and a streamlined head to help it swim towards the
egg
-There are lots of mitochondria in the cell to provide the energy
needed
-It carries enzymes in its head to help digest through the egg cell
membranes
What are nerve cells specialised for and how are they specialised? - -
ANS✔️--Rapid signalling - they carry electrical signals from one part of
the body to another
-They are long to cover more distance
-They have branched connections at their ends to connect to other
nerve cells and form a network throughout the body
What are muscle cells specialised for and how are they specialised? - -
ANS✔️--Contraction - they need to contract quickly
-They are long so they have space to contract
-They contain lots of mitochondria to generate the energy needed for
contraction
