Additional Biology Past exam paper questions with answers

This is a word document of all the past exam papers for additional biology studied at GCSE level that I have uploaded and made myself. Hope it helps. :)

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Preview of Additional Biology Past exam paper questions with answers

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Iza Rehman
Additional Biology Past Exam Paper Questions
Enzymes are used in biological detergents. Name the type of enzyme that digests stains
containing starch.
A new detergent is marketed as being `environmentally-friendly'. Scientists compared the
performance of this new detergent with an existing detergent. They measured the time
taken by the two detergents to remove a fat stain at different temperatures. The graph
shows their results.
Describe the effect of increasing the temperature on the time taken by the existing
detergent to remove the stain.
Fall then rise
Optimum at 39-41
The new detergent works at a lower temperature than existing one. Is the new detergent
likely to be more `environmentally friendly' than the existing one?
Less heat
Electricity used or wasted
Conserves fuel supplies
Neither detergent works well at 60 degrees Celsius
Enzyme becomes
Destroyed or
Shape of enzyme changes
Which one of these is affected by cystic fibrosis? Blood Cell membranes Kidneys
Nervous System
Cell membranes
The diagram shows the inheritance of cystic fibrosis in a family. The allele that produces
cystic fibrosis is recessive.
Explain why Alice inherited Cystic Fibrosis.
Additional Biology

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Iza Rehman
2 recessive alleles that contained the disease
Cystic Fibrosis
From both her parents
Bob and Carol
Explain why Ted did not inherit Cystic Fibrosis.
Inherited dominant gene from Carol, Mother
Suggest one reason why many people support the screening of embryos for the cystic
fibrosis allele.…read more

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Iza Rehman
Battery chickens produce more eggs per year than free range chickens. Suggest one reason
Less movement
Less heat loss
More feeding
Selective breeding
The animals that we raise for food are usually herbivores (plant eaters) rather than carnivores
(flesh eaters). Explain why.
Less steps in food chain
Less losses of biomass
Cheaper to feed herbivores
Chromosomes contain molecules of DNA. Genes are small sections of DNA. Each gene
contains a code.…read more

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Iza Rehman
Child gets 17 19 22 24 from mother
Child gets 18 20 21 23 from B
No lines from man A correspond to child
Only half the bars of the child's DNA fingerprint match the mother's DNA fingerprint. Explain
Contain only half of mothers genetic information
Due to meiosis
The hormone insulin is a protein. Insulin is produced in the pancreas and controls blood
glucose concentration.…read more

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Iza Rehman
Conclusion justified by argument
Changing the conditions in which plants grow affects how fast they grow. The diagram shows a
propagator in which scientists can control temperature, light intensity, and carbon dioxide
The graph shows the effects of changing the temperature, light intensity and carbon dioxide
concentration on the growth of lettuce plants.
Describe and explain the effect of increasing light intensity on the mean mass of lettuce
plants at 4% carbon dioxide and 15 degrees Celsius.…read more

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Iza Rehman
Nitrate deficiency ­ Stunted growth
Magnesium function ­ Produce chlorophyll
Magnesium deficiency ­ yellow leaves
Tuna fish are carnivores. In the wild they feed on smaller fish called herring. Herring
feed on plankton. Tuna can be attacked by parasitic worms which feed on their flesh. In the
space below sketch the appearance of a pyramid of biomass for this food
chain. Do not forget to label each section of the pyramid.…read more

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Iza Rehman
Young tuna are caught by fish farmers and reared in large pens in the sea. The fish are fed
more food than they would normally catch themselves so they grow quickly. When they
reach 400 kg they are sold. The graph on the opposite page shows the effect of feeding tuna
different amounts of protein in their food.
Calculate the average increase in mass per month of the fish fed on the
low-protein diet over the six months.…read more

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Iza Rehman
Which letter A, B, C or D represents respiration and photosynthesis.
Respiration = D
Photosynthesis = A
Decay occurs more quickly if the container has holes in the sides. Explain why.
Oxygen can enter
For aerobic respiration
Spreading compost on the soil between plants leads to better growth of the plants. Suggest
More minerals
More nutrients
Minerals and elements available
In the 1850s Gregor Mendel carried out breeding experiments using peas.…read more

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Iza Rehman
The diagram shows a representative sample of seeds produced by second generation plants.
Describe how the student could obtain a sample that is representative of seeds produced by
the second generation.
Random selection
What was the approximate ratio of yellow seeds to green seeds in the seeds produced by
the second generation?
Seed colour in peas is controlled by a single gene which has two alleles.…read more

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Iza Rehman
Diabetes may be caused by a lack of insulin. Part of the treatment for someone with
diabetes is to pay careful attention to the diet. Give one symptom of diabetes.
High blood pressure
Cannot control blood sugar
Give one way in which a diabetic may be advised to change their diet.…read more


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