AQA GCSE Biology B2- Additional

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GCSE ADDITIONAL
BIOLOGY (B2)
REVISION BOOKLET
Name ________________________
These are summary questions for all topics in the GCSE Biology B2
exam. When you have completed the booklet collect a mark
scheme and mark your work. Check off each section and enter
your score.
If you find a section(s) produce low scores you can:
Come to catch up and ask your teacher for help
Go online:
o http://www.bbc.co.uk/schools/bitesize/
o http://www.s-cool.co.uk/
o http://web.aqa.org.uk/qual/newgcses/science/new/bio_
materials.php?id=03&prev=03
Use your notes and revision guides
You can purchase revision guides from Mrs Fuller in the main
science prep room.
All the above will identify areas of weakness and give you
strategies to swat up on.
Score Date Grade % Grade
B2.1 Cells /11 90+ A*
B2.2 How plants produce food /14 80 A
B2.3 Energy Flows /15 70 B
B2.4 Enzymes /28 60 C
B2.5 Homeostasis /15 50 D
B2.6 Inheritance /15 40 E
End of unit exam /25 30 F
20 G
S Williams Nov `10

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B2.1 Cells
Summary sheet
Name: Date:
Summary questions
1 Look at this table showing how long different cells live for:
Type of cell Life in days
Liver cell 250
Muscle cell 240
Red blood cell 100
Skin cell 18
a) What does this data tell you about how these cells are produced?
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Now read the following information:
All nerve cells develop when a person is very young.
Most people in Britain live in excess of 70 years.…read more

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B2 1
Summary sheet
Continued ...
2 Read the following article:
In Japan, each child is presented with its own umbilical cord in a decorated box to remind it of the bond
with its mother. At the end of the 20th century there was a nuclear accident in Japan. The two workers who
were most affected had their bone marrow destroyed. One received a bone marrow transplant from his
sister. His blood-cell levels improved quite fast. The other had no relatives with a tissue match.…read more

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B2.1 Cells
Summary sheet
Answers to summary questions
Answers
1 a) These cells must be produced on a regular basis to replace those that die
otherwise the organs listed would quickly break down. 1 mark
b) Many nerve cells live for at least 70 years otherwise the human body could
not function for that length of time. 1 mark
But clearly some nerve cells die sooner (progressively throughout life in
fact) and this explains the decrease in memory and other brain functions
with age.…read more

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B2 2
Summary sheet
Continued ...
At a plant clinic run by a local garden centre, a number of people turn up with plants that are not
growing as well as they should. For each plant, explain what is wrong with it and suggest what needs
to be done to the soil to make sure that the crop picks up and grows well.
Plant A has pale leaves with yellow patches. It is not growing very well.
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...............................................................................................................................................................…read more

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B2.2 How plants produce food.
Summary sheet
Answers to summary questions
1 a) A­3; B­1; C­4; D­2. 4 marks
b) Variegated. 1 mark
c) i) To enable the colour of iodine reacting with any starch to be clearly
seen. 1 mark
ii) By boiling in ethanol. 1 mark
2 a) To make amino acids/proteins. 1 mark
b) With water from the soil. 1 mark
c) Dead and decaying animals and plants; fertilisers.…read more

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B2.3 Energy Flows
Summary sheet
Name: Class:
Summary questions
1 a) What do we mean by the term `biomass'?
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b) What is a pyramid of biomass?
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c) Draw a pyramid of biomass for this food chain:
rosebush aphids ladybirds birds
d) Using this example, explain why a pyramid of biomass is often more useful to us than a
simple pyramid of numbers.
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..................................................................................................................................................…read more

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B2 3
Summary sheet
Continued ...
2 Over the last 50 years, levels of carbon dioxide in the atmosphere have been rising.
a) One possible cause of this effect is the increase in the amount of fossil fuels used by people.
Why does burning fossil fuels increase the levels of carbon dioxide?
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b) Why has our use of fossil fuels gone up so much?
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..................................................................................................................................................…read more

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B2.3 Energy Flows
Summary sheet
Answers to summary questions
Answers
1 a) The mass of living material in an animal or a plant. 1
b) A scale drawing representing the biomass of all the organisms at each
stage of a food chain. 1
c) The block representing the rose bush should be the largest, 1
the one for the birds the smallest. 1
d) Because, in pyramids like this one, there is only one producer but many
primary consumers.…read more

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