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IGCSE Co-ordinated Sciences Post-Mock Revision Questions

Biology Portion

Name: ……………………………………………………………

COORDINATED SCIENCE – BIOLOGY PORTION 0654/1 Paper 1 Multiple Choice March 2012 45 minutes Additional Materials: Multiple Choice Answer Sheet

Soft clean eraser Soft pencil (type B or HB is recommended)

READ THESE INSTRUCTIONS FIRST

Write in soft pencil.

Do not use staples, paper clips, highlighters, glue or correction fluid.

Write your name, Centre number and candidate number on the Answer Sheet in the spaces

provided unless this has been done for you.

There are forty questions on this paper. Answer all questions. For each question there are four

possible answers A, B, C and D.

Choose the one you consider correct and record your choice in soft pencil on the separate

Answer Sheet.

Read the instructions on the Answer Sheet very carefully.

Each correct answer will score one mark. A mark will not be deducted for a wrong answer.

Any rough working should be done in this booklet.

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1 Which characteristic of living organisms is described by the following definition?

‘The ability to detect changes in the environment and make responses’.

A excretion

B movement

C respiration

D sensitivity

2 What is defined as the chemical reactions that break down food molecules in cells to release energy?

A excretion

B movement

C nutrition

D respiration

3 A human cheek cell and a spongy mesophyll cell from a leaf are examined under a microscope.

Which structures are seen in both cells?

A cell membrane, nucleus and cytoplasm

B cell wall, cell membrane and nucleus

C cytoplasm, cell wall and cell membrane

D nucleus, cytoplasm and cell wall

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4 The sentence describes the uptake of water by a plant.

Water moves into the root hairs of a plant by osmosis through a ...…1…... permeable cell membrane, ……2…… a water potential gradient.

Which words correctly complete gaps 1 and 2?

5 Which of these processes require energy from respiration?

6 Four test-tubes containing egg white are incubated for ten minutes at 35 °C. Different substances are then added to the four test-tubes.

In which test-tube is the egg white first digested?

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7 The diagram shows an experiment on amylase.

Each beaker contains water at the temperature shown.

After five minutes, each test-tube of amylase is poured into the test-tube of starch solution in the same beaker.

After leaving the tubes for 5 minutes, samples of the mixture are tested with iodine solution and are then tested again at 5 minute intervals.

Which results are expected?

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8 Nutrients are made up of smaller basic units. Nutrients can be identified by food tests.

Which nutrient is a protein?

9 Which row in the table correctly identifies the deficiency diseases caused by lack of vitamin C, calcium and iron?

10 Which signs show that a plant has been grown in a culture solution deficient in magnesium?

A purple leaves and poor root growth

B small leaves and thin stem

C white upper leaves and normal lower leaves

D yellow stem and yellow leaves

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11 The graph shows the rate of photosynthesis in a pea plant at different light intensities.

At which point is carbon dioxide concentration a limiting factor?

12 The diagram shows the position of the teeth in a human jaw.

Which teeth are found at the positions numbered 1, 2 and 3?

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13 The diagram shows the human gut.

Which numbered structures secrete digestive enzymes?

A 1, 2, 3 and 4

B 1, 2, 3 and 6

C 2, 3, 4 and 5

D 2, 3, 5 and 6

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14 Which substances are transported in the phloem and which in the xylem?

15 The diagram shows a plant shoot and the same shoot six hours later.

Which change in environmental conditions could cause this change in the appearance of the shoot?

A a decrease in available water

B a decrease in light intensity

C a decrease in wind speed

D an increase in humidity

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16 The diagram shows a section through the human heart.

What happens as blood is being pumped out of the heart?

17 Which sequence shows the shortest route taken by blood travelling from a leg to an arm in the human body?

A leg → heart → lungs → heart → arm

B leg → heart → lungs → kidney → arm

C leg → kidney → heart → lungs → arm

D leg → lungs → heart → gut → arm

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18 What are the products of anaerobic respiration in humans and in yeast?

19 Which statement about respiration is not correct?

A All living cells respire.

B Heat is always produced.

C Plants respire in the light and in the dark.

D Plants take in carbon dioxide and give out oxygen.

20 The table shows the composition of inspired and expired air.

What are the likely percentages at X and Y?

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21 The diagram shows part of the human gas exchange system.

What are W, X, Y and Z?

22 What decreases as a result of adrenaline secretion?

A blood sugar level

B digestive activity

C heart rate

D size of the pupils of the eyes

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23 What are the functions of the relay, motor and sensory neurones in a reflex response?

24 The diagram shows a section through skin.

What happens if the body temperature starts to fall below normal?

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25 The diagram shows seedlings in an experiment on the tropic response of shoots to gravity and light.

How has the shoot responded?

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26 The diagram shows a potato tuber that developed from the stem of a parent potato plant. Three shoots are starting to grow from the tuber.

How do the genotypes of the shoots compare with the genotypes of the tuber and of the parent?

A They are all different.

B They are all identical.

C The shoots are identical to each other, but are different from the tuber and the parent.

D The shoots are identical to the tuber, but are different from the parent.

27 Male and female sea urchins release their sperm and eggs into the water where fertilisation takes place.

How can their reproduction be described?

A asexual reproduction which results in genetically dissimilar offspring

B asexual reproduction which results in genetically identical offspring

C sexual reproduction which results in genetically dissimilar offspring

D sexual reproduction which results in genetically identical offspring

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28 The diagrams show two kinds of fruit.

How are the seeds of these fruits dispersed?

29 The diagram shows a pod from a pea plant.

Which line correctly shows the path that was taken by a pollen tube to an ovule?

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30 The diagram shows how the blood of a human embryo flows close to the mother’s blood in the placenta.

Which substances are present at X in higher concentrations than at Y?

A carbon dioxide and glucose

B carbon dioxide and urea

C glucose and oxygen

D glucose and urea

31 Which statement about chromosomes is correct?

A Chromosomes are long DNA molecules called genes which are divided into sections.

B Chromosomes include a long molecule of DNA divided into sections called genes.

C Chromosomes include genes which are divided into sections called DNA molecules.

D Genes include long DNA molecules called chromosomes.

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32 In the leopard, coat colour is controlled by a single gene with two alleles, H and h. There are two varieties - black panthers and spotted leopards.

The diagram shows a cross between a spotted leopard and a black panther. All the offspring in the F1 generation were spotted leopards. The results of a cross between two animals of the F1 generation are also shown.

What are the genotypes of the original two parents?

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33 The table shows some features of cell division.

Which line correctly describes the division of a cell by mitosis?

In which structures are haploid nuclei formed by reduction division?

34 The diagram shows two distinct forms of beetle. The difference between them is controlled by a single gene. The allele for the black form is dominant to the allele for red.

What kind of variation is shown by the beetle and why?

A continuous variation because it is controlled by genes

B continuous variation because there are two forms

C discontinuous variation because it is controlled by genes

D discontinuous variation because the two forms are distinct

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35 The diagram shows organisms in a habitat.

Which shows the feeding relationships of these organisms?

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36 The diagram shows part of a food web.

How many herbivores are shown?

A 3 B 4 C 5 D 6

37 Which term is used to describe both of these processes?

Process 1 In some towns, empty glass bottles are melted down. The new glass is used to make new bottles.

Process 2 Bacteria in the soil break down protein in dead animals and plants. The nitrates released by the bacteria are used by plants.

A conservation

B decomposition

C pollution

D recycling

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38 Lichens are organisms which are very sensitive to air pollution.

The graph shows how the distance from a coal-fired power station affects the number of different types of lichen growing.

Which conclusion can be drawn from this information?

A Lichens grow faster near the power station.

B Lichens grow more slowly near the power station.

C Sulfur dioxide from the power station inhibits the growth of lichens.

D There are fewer different types of lichen growing near the power station.

39 A large area is heavily overgrazed for many years.

How does this affect soil nutrients and soil erosion?

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40 If high levels of nitrates are washed into rivers, the following changes may occur, causing fish to die.

1 Water plants die and fall to the bottom.

2 Bacteria multiply rapidly.

3 Concentration of oxygen in the water decreases.

4 Increased growth of single-celled water plants makes the water green.

In which order do these changes take place?

A 1 → 4 → 3 → 2

B 2 → 3 → 1 → 4

C 3 → 2 → 4 → 1

D 4 → 1 → 2 → 3