Biology AS Unit 1 Past Exam style questions AQA

Exam style questins that my teacher gave.
Hope they help.
Layout is such that question are in topic order. Then after each question the answer is straight after for easy checking

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AS AQA BIOLOGY :UNIT 1
PAST EXAM QUESTIONS & ANSWERS
AS Biology:
UNIT 1 Biology and Disease
1. CAUSES OF DISEASE.
2. ENZYMES AND THE DIGESTIVE SYSTEM.
3. CELLS AND THE MOVEMENT IN AND OUT OF THEM.
4. LUNGS AND LUNG DISEASES.
5. THE HEART AND HEART DISEASE .
6. IMMUNITY.
TOPIC 1 CAUSES OF DISEASE :
1. Smoking is a risk factor associated with coronary heart disease. Smoking is
known to raise the concentration of fibrinogen in the blood, promote the
aggregation of platelets and reduce the ability of arteries to dilate.
Use this information to:
(a) explain the effect of smoking on blood pressure
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(2)
(b) explain how smoking might lead to the formation of a blood clot.
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AS AQA BIOLOGY :UNIT 1
PAST EXAM QUESTIONS & ANSWERS
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(3)
Total 5 marks)
Ans1 (a)
Because arteries cannot dilate / dilate less
Heart must work harder to force blood through
Increases blood pressure
max 2
(b) Higher blood pressure causes damage to blood vessel lining / endothelium
/ collagen
Platelets stick together / form a plug / adhere to collagen fibres
Release of thromboplastin / thrombokinase
Fibrinogen converted to insoluble fibrin
Platelet plug trapped by fibrin mesh max 3
[5]
2.…read more

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AS AQA BIOLOGY :UNIT 1
PAST EXAM QUESTIONS & ANSWERS
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(2)
(b) (i) Over the period shown, the incidence of melanoma has
increased. Give two other conclusions that can be drawn from the
graph, about the incidence of melanoma.
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(2)
(ii) In a population of 1 million people where half were male and half
were female, how many people developed melanoma in 1980? Show
your working.
Answer = ...................................…read more

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AS AQA BIOLOGY :UNIT 1
PAST EXAM QUESTIONS & ANSWERS
Total 8 marks)
Ans 2 (a)
(Cancer = ) mass of cells that divide continuously / uncontrolled / faster
(Malignant = ) can spread (to other body parts)
2
(b) (i) Higher incidence in females than males / females have higher risk
Correlation between changes in males and females / changes in both
occur at same times
Change in rate between c19811986 / larger increase then 2
(ii) Male = 3 (per 100,000) and female…read more

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AS AQA BIOLOGY :UNIT 1
PAST EXAM QUESTIONS & ANSWERS
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(3)
(ii) Suggest one reason why people who neither drink nor smoke sometimes
develop mouth cancer.
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AS AQA BIOLOGY :UNIT 1
PAST EXAM QUESTIONS & ANSWERS
Ans 3.…read more

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AS AQA BIOLOGY :UNIT 1
PAST EXAM QUESTIONS & ANSWERS
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AS AQA BIOLOGY :UNIT 1
PAST EXAM QUESTIONS & ANSWERS
(b) People have been advised to reduce their cholesterol intake as a part of a
healthy life style. The graph shows information about mean daily intake of
cholesterol.
Calculate which group, male or female, shows the greater percentage
reduction in cholesterol intake between 1960 and 1995. Show your
working.
(2)
(c) Explain how smoking and a high blood cholesterol concentration increase
the risk of developing coronary heart disease.
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AS AQA BIOLOGY :UNIT 1
PAST EXAM QUESTIONS & ANSWERS
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(6)
(Total 12 marks)
Ans4.…read more

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AS AQA BIOLOGY :UNIT 1
PAST EXAM QUESTIONS & ANSWERS
TOPIC 2 ENZYMES AND THE DIGESTIVE SYSTEM
1. Sucrose is a disaccharide. It is also a nonreducing sugar.
(a) Benedict's solution is used to identify nonreducing sugars.
Complete the flow chart to show the steps you would carry out in order to
get a positive result.
(2)
Ans 1. (a) Hydrochloric acid
Neutralise/Add alkali/named alkali 2
2. PrP is a protein normally found in brain tissue.…read more

Comments

Habz100

amazing! Thank you so much!

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