AQA GCSE Biology paper
1Exam Questions and Answers
100% PASS
Magnification equation—ANSWER-Magnification= image size/actual object
size
Light microscope- how many um in 1 mm—ANSWER-1000 um
light microscope- how many nm in 1 um—ANSWER-1000 nm
Light microscope- why can we see the nucleus and cell wall but not the
mitochondria—ANSWER-Too small and not stained
light microscope- how can we see smaller parts of cells—ANSWER-An
electron microscope has much more resolution and magnification
What is osmosis?—ANSWER-The movement of water from an area with high
concentration of water to an area of low concentration of water
What's a solute—ANSWER-Something that dissolves in water
Investigating osmosis- what are the results—ANSWER-High concentration of
sugar in solution- water moves out of potato cells into the solution.potato
gets smaller, low concentration potato gets bigger
, Control variables of investigating osmosis—ANSWER-Amount of solution
Investigating osmosis- why should you remove excess water with paper
towels before weighing—ANSWER-to ensure that any change in the mass of
the potato is due to a change in the water content inside the potato cells
How do you test for starch—ANSWER-Add iodine to substance. Turns black
if starch present
How to test for protein—ANSWER-Add biuret. Turns purple
How to test for reducing sugar—ANSWER-Add benedicts and heat for 2
mins. Turns red
How to test for lipid—ANSWER-Add ethanol then add water. Turns cloudy
Investigating amylase enzyme- why do you need a water bath—ANSWER-To
maintain the correct temperature, because temperature affects reaction rate
Investigating amylase enzyme- if you text at ph 3,4,5,6,7,8,9&10 why don't
we know the exact optimum ph—ANSWER-Because all though two answers
may both show quick reactions, the actual optimum could be between those
numbers so you need to test different phs to find exact optimum
Investigating amylase enzyme- sources of error and weaknesses—ANSWER-
Measuring, starting and stopping timers
Light and photosynthesis results—ANSWER-The closer the lamp, the
quicker the bubbles are produced, so higher rate of photosynthesis
© 2026 Copyright. All Rights Reserved. This document is
protected by copyright law, Copyrighted By Katelyn Whitman
1Exam Questions and Answers
100% PASS
Magnification equation—ANSWER-Magnification= image size/actual object
size
Light microscope- how many um in 1 mm—ANSWER-1000 um
light microscope- how many nm in 1 um—ANSWER-1000 nm
Light microscope- why can we see the nucleus and cell wall but not the
mitochondria—ANSWER-Too small and not stained
light microscope- how can we see smaller parts of cells—ANSWER-An
electron microscope has much more resolution and magnification
What is osmosis?—ANSWER-The movement of water from an area with high
concentration of water to an area of low concentration of water
What's a solute—ANSWER-Something that dissolves in water
Investigating osmosis- what are the results—ANSWER-High concentration of
sugar in solution- water moves out of potato cells into the solution.potato
gets smaller, low concentration potato gets bigger
, Control variables of investigating osmosis—ANSWER-Amount of solution
Investigating osmosis- why should you remove excess water with paper
towels before weighing—ANSWER-to ensure that any change in the mass of
the potato is due to a change in the water content inside the potato cells
How do you test for starch—ANSWER-Add iodine to substance. Turns black
if starch present
How to test for protein—ANSWER-Add biuret. Turns purple
How to test for reducing sugar—ANSWER-Add benedicts and heat for 2
mins. Turns red
How to test for lipid—ANSWER-Add ethanol then add water. Turns cloudy
Investigating amylase enzyme- why do you need a water bath—ANSWER-To
maintain the correct temperature, because temperature affects reaction rate
Investigating amylase enzyme- if you text at ph 3,4,5,6,7,8,9&10 why don't
we know the exact optimum ph—ANSWER-Because all though two answers
may both show quick reactions, the actual optimum could be between those
numbers so you need to test different phs to find exact optimum
Investigating amylase enzyme- sources of error and weaknesses—ANSWER-
Measuring, starting and stopping timers
Light and photosynthesis results—ANSWER-The closer the lamp, the
quicker the bubbles are produced, so higher rate of photosynthesis
© 2026 Copyright. All Rights Reserved. This document is
protected by copyright law, Copyrighted By Katelyn Whitman
