AQA A LEVEL BIOLOGY PAPER 2
PRACTICE EXAM | LATEST 2026 | WITH
QUESTIONS AND CORRECT VERIFIED
ANSWERS | ALREADY GRADED A+ |
100% GUARANTEED PASS | BRAND
NEW VERSION!!!!!!
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? - CORRECT ANSWER
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 - CORRECT ANSWER 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 - CORRECT ANSWER Undifferentiated
Can keep dividing / replicating
How might the insertion of DNA into a cell cause cancer? - CORRECT ANSWER DNA disrupts
tumor suppressor gene
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? - CORRECT ANSWER A
More succinate dehydrogenase
So more aerobic respiration / mitochondria
Explain the distribution of mitochondria in slow muscle fibres - CORRECT ANSWER 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 - CORRECT ANSWER Use a graticule
Calibrate against something of known size e.g ruler
A student found the mean diameter of muscle fibres
PRACTICE EXAM | LATEST 2026 | WITH
QUESTIONS AND CORRECT VERIFIED
ANSWERS | ALREADY GRADED A+ |
100% GUARANTEED PASS | BRAND
NEW VERSION!!!!!!
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? - CORRECT ANSWER
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 - CORRECT ANSWER 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 - CORRECT ANSWER Undifferentiated
Can keep dividing / replicating
How might the insertion of DNA into a cell cause cancer? - CORRECT ANSWER DNA disrupts
tumor suppressor gene
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? - CORRECT ANSWER A
More succinate dehydrogenase
So more aerobic respiration / mitochondria
Explain the distribution of mitochondria in slow muscle fibres - CORRECT ANSWER 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 - CORRECT ANSWER Use a graticule
Calibrate against something of known size e.g ruler
A student found the mean diameter of muscle fibres
