Maths for Biology

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Name ___________________________
AS Biology 2015 Spec ­ Maths Question Practice
Questions 1-5.............Heart calculations
Questions 6-11...........Magnification calculations
(NB scales may be different due to print size)
Questions 12-15.........Percentage Change
Questions 16-25.........Data analysis / general maths

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Page 2

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During the cardiac cycle, there are pressure changes in the left atrium, left ventricle and aorta.
The graph shows these pressure changes in the left atrium, left ventricle and aorta of a person.
(a) (i) Which time period corresponds with ventricular systole?
(1)
A 0.52 to 0.72
B 0.72 to 0.92
C 0.92 to 1.20
D 0.24 to 0.98
(ii) Which of the following is occurring in the heart at 1.…read more

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A student was interested to find out how his heart rate would vary throughout the day.
He wore a heart rate monitor from the time he woke up until the time he went to bed.
The graph shows the data collected and some of the student's activities during the day.
Calculate the rate of increase in the student's heart rate between 6 am and 8 am.
(2)
Answer ...........................................................
3. A scientist investigated the volume of blood pumped by the heart of a healthy individual.…read more

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During the cardiac cycle, there are pressure changes in the left atrium, left ventricle and aorta.
The graph shows these pressure changes.…read more

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A student studied the external view of a mammalian heart, as shown in the diagram.
The student wanted to compare the size of the aorta and the vena cava of this heart.
She determined the cross-sectional area of the aorta, which was 72.22 mm2.
She also measured the diameter of the vena cava which was 17.0 mm.
(i) Calculate the difference in the cross-sectional area of the vena cava and the aorta.
(2)
Answer ...........................................................…read more

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In animals, sperm cells and egg cells are involved in sexual reproduction.
The photomicrographs show human sperm cells and a human egg cell. They are not shown to scale.
Using an eyepiece graticule (micrometer), the head of a human sperm cell was measured as 5 m in
length and the egg cell 0.1 mm in width.
Calculate how many times larger the egg cell is compared to the head of the sperm cell.
(2)
Answer ...........................................................
7.…read more

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The photograph below shows cells dividing by mitosis.
(a) The actual length of cell J is 23.5 m.
(i) Calculate the magnification of this photograph.
(3)
Answer ...........................................................
9 The electronmicrograph below shows an image of a chloroplast.
(ii) The equation below can be used to calculate the magnification of this chloroplast.
image length = actual length × magnification
The actual length of this chloroplast is 0.007 mm.
Measure the image length between lines W and Y.…read more

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A student investigated the effect of temperature on the heart rate of Daphnia.
(a) Use the lines A to B to calculate the actual length of this Daphnia.
(2)
Answer ...........................................................
(b) The student used five Daphnia in the investigation.
The Daphnia's heartbeats were counted over a 20-second period.
A stopwatch was used and a pencil mark made on a piece of paper while observing the Daphnia
through a low powered microscope.
The number of heartbeats was counted three times for each Daphnia.…read more

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Many animals reproduce sexually.
The diagram shows a healthy human sperm cell.
(ii) Which of the following is the approximate diameter of the sperm cell nucleus?
(1)
A 0.4 m
B 4 m
C 0.4 nm
D 4 nm
12 In some species of mammal, at fertilisation most of the sperm cell enters the egg cell. The fertilised
cell then divides by mitosis.
(i) A sperm cell containing 65 mitochondria fertilises an egg cell containing 100 000 mitochondria.…read more

Page 10

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Carbohydrates are the body's main energy source.
The graph shows the change in concentration of blood glucose and muscle glycogen during exercise.
Calculate the percentage change in muscle glycogen during the three hours of exercise.
(2)
Answer ...........................................................…read more

Comments

ht010233

do you have the answers for these exam questions?

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