Cambridge IGCSE Biology - 0610 - Supplement Paper 2 2013 Winter Zone 1

Which process provides the raw materials needed for tissue repair?
A excretion
B growth
C nutrition
D respiration

The diagram shows an arthropod.
How many pairs of jointed legs does this arthropod have?
A 2
B 20
C 21
D 40

Which group does not contain animals that are arthropods?
A. annelids
B. arachnids
C. crustaceans
D. insects

Keys are used in biological identification.
Which statement may appear in a key and alone could identify one of the plants in the diagrams?

A. The plant has a single deep root with small branches.
B. The plant has many similar roots, arising from a single point.
C. The plant has one flower on the stem.
D. The plant has pointed leaves.

The diagrams show a leaf cell before and after staining with iodine solution.

!(cid:image1)

Which substance causes the iodine solution to change colour?
A chlorophyll
B protein
C reducing sugar
D starch

The diagram shows a cell seen under the light microscope.
Which labels are correct?
[Table_1]
A | P: cell membrane, Q: cytoplasm
B | P: cell membrane, Q: vacuole
C | P: cell wall, Q: cytoplasm
D | P: cell wall, Q: vacuole

Which is a tissue and which is an organ?
[Table_1]

Which series of terms is listed in order of increasing level of organisation?
A cell → organ → tissue → organ system
B cell → tissue → organ → organ system
C tissue → cell → organ → organ system
D tissue → organ → organ system → cell

The diagram shows six cells: P, Q, R, S, T, and U.

Which are plant cells and which are animal cells?
[Table_1]
Options:
A) Plant cells: P, Q and U; Animal cells: R, S and T
B) Plant cells: P, R, S and T; Animal cells: Q and U
C) Plant cells: Q and T; Animal cells: P, R, S and U
D) Plant cells: R, S and U; Animal cells: P, Q and T

Which diagram shows the appearance of a plant cell several minutes after it has been placed in a concentrated solution of sugar?
[Image_1 with diagrams labeled A, B, C, D]

The diagrams show an experiment when set up and the same experiment two hours later.


What explains the movement of water and dye?

| | movement of water | movement of dye |
|-------------|-------------------|-----------------------|
| A | diffusion | osmosis |
| B | osmosis | diffusion |
| C | osmosis | translocation |
| D | translocation | diffusion |

Which statement is correct for all catalysts?
A. They are enzymes.
B. They are proteins.
C. They speed up chemical reactions.
D. They work in living organisms.

Two enzyme-controlled reactions are shown.

amino acids [enzyme 1] → proteins
proteins [enzyme 2] → amino acids

From these reactions, what deduction can be made about enzymes?
A. Enzyme 1 has been changed to enzyme 2.
B. Enzyme 2 slows down the production of amino acids.
C. Enzymes can build up large molecules.
D. Enzymes only break down large molecules.

The diagram shows two food molecules before and after they have been digested by enzymes.
What identifies the products of fat digestion?
A. P and R
B. P and S
C. Q and R
D. Q and S

Four foods were tested for each of the following nutrients:
fat (using ethanol);
protein (using the biuret test);
reducing sugar (using Benedict’s solution),
Which food contains protein and fat?
[Table_1]

The graphs show the quantities of selected vitamins and mineral ions in four foods.

Which food is the richest source of the vitamin or mineral ions essential for the transport of oxygen by the blood?
A beans
B egg
C fish
D fruit

The diagram shows the circulatory system of a mammal.

What describes the blood in vessels X and Y?
[Table_1]
X | Y
A. deoxygenated | deoxygenated
B. deoxygenated | oxygenated
C. oxygenated | deoxygenated
D. oxygenated | oxygenated

In which order does water pass through these tissues in a plant?
A. mesophyll → xylem → root cortex
B. root cortex → mesophyll → xylem
C. root cortex → xylem → mesophyll
D. xylem → mesophyll → root cortex

The diagram shows two shoots at the start of an experiment on transpiration.
What are the likely readings on the spring balances after three days?
[Table_1]
A. shoot X: 30g, shoot Y: 30g
B. shoot X: 30g, shoot Y: 25g
C. shoot X: 25g, shoot Y: 30g
D. shoot X: 25g, shoot Y: 25g

The diagram shows a section through an alveolus and a capillary.
Why does carbon dioxide move from X to Y?
A. Air has a lower concentration of carbon dioxide than blood.
B. Carbon dioxide moves more freely in air than in blood.
C. Carbon dioxide must replace oxygen.
D. Diffusion of carbon dioxide can only be out of the blood.

The table shows the approximate composition of air breathed out by a mammal.
[Table_1]

Where did the nitrogen in the air breathed out come from?
A It was a product of proteins broken down in the mammal.
B It was a product of respiration.
C It was in the air that was breathed in.
D It was exchanged for oxygen which was taken into the blood.

The diagram shows some structures in the human neck and thorax. The lining of tube Q has cilia.
What is an important function of the cilia?

A: to help in the exchange of gases
B: to increase the internal surface area of tube Q
C: to moisten the air entering and leaving the lungs
D: to move mucus towards the throat

The diagram shows some blood vessels near the surface of the skin.
If vasoconstriction occurs at X, what happens to the blood flow at Y and Z?
[Table_1]

A person has a high-protein diet.
What describes the level of urea in the blood leaving the liver and in the urine leaving the kidneys?
[Table_1]

The diagram shows seedlings in two experiments on the tropic response of seedlings to gravity and light.
[Image_1: In Experiment 1, the effect of gravity is shown. The shoot orientation changes from horizontal to upward after 3 days in the dark.]
[Image_2: In Experiment 2, the effect of light is shown. The shoot orientation changes toward the light after 3 days with light from one side.]
How have the seedlings responded?
[Table_1: A table with responses to gravity and light: A (✓,✓), B (✓,✗), C (✗,✓), D (✗,✗).] Key: ✓ = tropic response shown, ✗ = no tropic response shown.

How does sweating cool the body?

A Sweating causes vasodilation.
B Sweating decreases the water content of the blood.
C Urea and salt are lost from the body in sweat.
D Water in sweat evaporates from the skin.

A mango tree can reproduce by seed and by asexual reproduction. Trees produced by each of these methods produce mango fruits. When comparing these fruits genetically, what is the correct result?

[Table_1]

The diagram shows a section through a flower.
After the flower is fertilised, which parts will develop into the fruit and the seed?
[Table_1]
Table 1:

The graph is a record of the growth of a plant.

Which labels should be used for the x-axis and the y-axis?
[Table_1]

Which environmental factor is not always a requirement for seed germination?

A. light
B. oxygen
C. suitable temperature
D. water

Most birds have a coloured pigment in their feathers, but in a few individuals, pigment is absent and the birds are albinos.
Albinism occurs when a bird is homozygous recessive for the gene which creates the coloured pigment.
If two albino birds mated, what describes the appearance of their offspring?
A. all albino
B. all coloured
C. 50% coloured, 50% albino
D. 75% coloured, 25% albino

In an animal, the allele for straight fur is dominant to the allele for curly fur.
A pair of these animals mate and have nine offspring with straight fur and three with curly fur.
F represents the allele for straight fur and f represents the allele for curly fur.
What are the most likely genotypes of the parents?
A) F and f
B) FF and ff
C) FF and Ff
D) Ff and Ff

What defines a diploid nucleus?
A) a nucleus containing two sets of chromosomes
B) a nucleus containing two unpaired chromosomes
C) a nucleus with two alternative forms of a gene
D) a nucleus with two separate threads of DNA

A food chain shows how organisms depend on each other for their sources of energy, but all energy comes ultimately from one source.
What is this energy source?
A leaves of plants
B meat
C sunlight
D water

The diagram shows a food web.


What type of organism is X?
A a carnivore
B a decomposer
C a herbivore
D a producer

The diagram shows the carbon cycle.



Which three letters represent respiration?

A P, Q and R
B P, Q and S
C T, S and V
D T, U and V

In which natural cycles do photosynthesis and respiration both play a part?
[Table_1]

What is the correct sequence for the stages in a sigmoid population growth curve?

A. lag → log → stationary
B. log → lag → stationary
C. stationary → lag → log
D. stationary → log → lag

The chart shows which species of different animals are present in rivers of different pH.
Which conclusion can be drawn from this information?
A. Both frogs and mayflies can live in more acidic river water than trout.
B. Clams and snails are most affected by acidic river water.
C. Most species can live in river water below pH 5.5.
D. Not all species are affected by acidic river water.

The graph shows the quantities of pesticides that accumulate in four populations, each at different trophic levels in a food chain.
Which population is most likely to be herbivores?