Aqa A Level Biology Paper 2
Questions I Got Wrong All
Answers 100% Correct Spring
Fall-2023/24 Edition Guaranteed
Grade A+
In an investigation into taxis, termites were split
into 3 groups
Group A had their eyes covered (moved straight
up)
Group B had their antenna covered (moved
straight to light) Group C were the control (moved
diagonally up and towards light) What does Group
A show about the factors controlling termite
movement?
Antenna involved in response to gravity
Don't respond to light as eyes are covered
In a graph of membrane permeability against
time, the line for Na+
ions increases rapidly between 0.5 and 0.7ms
Explain why
Na+ gated channel proteins open
Na+ move into axon by facilitated diffusion
Neurone depolarised
Stimulates more Na+ channels to open
Give 2 properties of stem cells
Undifferentiated
Can keep dividing / replicating
How might the insertion of DNA into a cell cause
cancer?
DNA disrupts tumor suppressor gene
Aqa A Level Biology Paper 2 Questions Got Wrong All Answers 100%
Correct Spring Fall-2023-2024 Edition Guaranteed Grade A+
, Tumor suppressor gene not
transcribed/inactivated
Rate of cell division increases (not controlled)
Succinate dehydrogenase catalyses a reaction in
the Krebs Cycle
In micrograph A there was a high amount of the
enzyme
In micrograph B there was a lower amount
of the enzyme Which micrograph is of a
slow muscle fibre and why?
A
More succinate dehydrogenase
So more aerobic respiration / mitochondria
Explain the distribution of mitochondria in slow
muscle fibres
Distributed near the surface
Short diffusion path for O2
O2 for ETC of aerobic respiration in mitochondria
You could use an optical microscope and a slide of
stained muscle
fibres to calculate the diameter of a
muscle fibre Explain how
Use a graticule
Calibrate against something of known size e.g
ruler
A student found the mean diameter of muscle
fibres
Explain two precautions that should have been
taken when sampling these
Large sample size - representative
Random sample - eliminate bias
A graph shows blood glucose concentration
against urine concentration measured using urine
test
Aqa A Level Biology Paper 2 Questions Got Wrong All Answers 100%
Correct Spring Fall-2023-2024 Edition Guaranteed Grade A+
Questions I Got Wrong All
Answers 100% Correct Spring
Fall-2023/24 Edition Guaranteed
Grade A+
In an investigation into taxis, termites were split
into 3 groups
Group A had their eyes covered (moved straight
up)
Group B had their antenna covered (moved
straight to light) Group C were the control (moved
diagonally up and towards light) What does Group
A show about the factors controlling termite
movement?
Antenna involved in response to gravity
Don't respond to light as eyes are covered
In a graph of membrane permeability against
time, the line for Na+
ions increases rapidly between 0.5 and 0.7ms
Explain why
Na+ gated channel proteins open
Na+ move into axon by facilitated diffusion
Neurone depolarised
Stimulates more Na+ channels to open
Give 2 properties of stem cells
Undifferentiated
Can keep dividing / replicating
How might the insertion of DNA into a cell cause
cancer?
DNA disrupts tumor suppressor gene
Aqa A Level Biology Paper 2 Questions Got Wrong All Answers 100%
Correct Spring Fall-2023-2024 Edition Guaranteed Grade A+
, Tumor suppressor gene not
transcribed/inactivated
Rate of cell division increases (not controlled)
Succinate dehydrogenase catalyses a reaction in
the Krebs Cycle
In micrograph A there was a high amount of the
enzyme
In micrograph B there was a lower amount
of the enzyme Which micrograph is of a
slow muscle fibre and why?
A
More succinate dehydrogenase
So more aerobic respiration / mitochondria
Explain the distribution of mitochondria in slow
muscle fibres
Distributed near the surface
Short diffusion path for O2
O2 for ETC of aerobic respiration in mitochondria
You could use an optical microscope and a slide of
stained muscle
fibres to calculate the diameter of a
muscle fibre Explain how
Use a graticule
Calibrate against something of known size e.g
ruler
A student found the mean diameter of muscle
fibres
Explain two precautions that should have been
taken when sampling these
Large sample size - representative
Random sample - eliminate bias
A graph shows blood glucose concentration
against urine concentration measured using urine
test
Aqa A Level Biology Paper 2 Questions Got Wrong All Answers 100%
Correct Spring Fall-2023-2024 Edition Guaranteed Grade A+
