Cambridge IGCSE Biology - 0610 - Supplement Paper 2 2015 Summer Zone 1

The diagram illustrates some of the processes carried out by living organisms.

Which characteristic of living organisms is represented by arrow X?
A. excretion
B. nutrition
C. respiration
D. sensitivity

What is a correct way of naming a species, according to the binomial system?

A. Homo sapiens
B. Homo Sapiens
C. human being
D. sapiens

The diagram shows four arthropods.
[Image_1: Diagram of Pediculus ×20, Anopheles ×10, Dermacentor ×7, Carcinus ×0.5]
How many of these arthropods are insects?
A 1
B 2
C 3
D 4

The key can be used to distinguish between four different chemical substances.
Use the key to identify which substance could be a protein.
1 contains the element carbon ........................... go to 2
does not contain carbon ........................... A
2 contains the element nitrogen ........................... B
does not contain nitrogen ........................... go to 3
3 gives a positive result with Benedict’s test ....................... C
gives a negative result with Benedict’s test ....................... D

The diagram shows two guard cells from a leaf.
Which labelled part would also be found in liver cells?

The diagram shows part of a leaf in cross-section.
Structures X and Y are both part of the same
A. cell.
B. organ.
C. tissue.
D. vessel.

The diagram shows a plant cell.
Which features show that it is a plant cell?
A It has a cell wall and a vacuole.
B It has a nucleus and cytoplasm.
C It has a nucleus but no chloroplasts.
D It has chloroplasts but no vacuole.

In a section through a plant, a student found a group of long, microscopic structures. The structures lacked end walls, cytoplasm and nuclei.
Which identification and reason best matches the student’s observations?
[Table_1]
identification | reason
A | root hair cells | they do not contain a nucleus when mature
B | root hair cells | they do not contain cytoplasm to absorb water
C | xylem vessels | they can support the plant better without cytoplasm
D | xylem vessels | they need to be hollow to carry water efficiently

The diagram shows a specialised cell cut in half.
What does this diagram indicate about the structure of this cell?
A The cell has a cell wall.
B The cell is concave on each side.
C The cell is long and thin.
D The cell is red and carries oxygen.

How do carbon dioxide and oxygen move in and out of a mesophyll cell?
A. active transport
B. diffusion
C. respiration
D. transpiration

During osmosis, which molecules move and through which type of membrane?

[Table_1]

| | molecules moving | type of membrane |
|---|------------------|----------------------|
| A | oxygen | partially permeable |
| B | oxygen | permeable |
| C | water | partially permeable |
| D | water | permeable |

The diagram shows an experiment on the digestion of the protein in egg albumen by protease.
The protease was taken from a human stomach.
In which test-tube will the protein be digested most quickly?
[Image_1: Diagram of test-tubes labeled A, B, C, D, each containing different combinations of egg albumen, protease, and dilute hydrochloric acid in a water bath at 37°C.]

Which effect does a gradual decrease in pH from 13 to 1 have on the action of amylase?
A slows it down only
B slows it down then speeds it up
C speeds it up only
D speeds it up then slows it down

The diagram represents a protein molecule. [Image_1 representing the protein molecule diagram]
What do the small circles represent?
A. amino acids
B. fatty acids
C. glycerol
D. simple sugars

Poor nutrition can lead to a condition called rickets in which bones fail to develop properly.
The table shows some minerals and vitamins present in four foods.
Which food would be best for a child who has rickets?

[Table_1]

| | calcium | iron | vitamin C | vitamin D |
|---|---------|------|-----------|-----------|
| A | ✓ | ✗ | ✓ | ✗ |
| B | ✓ | ✗ | ✗ | ✓ |
| C | ✗ | ✓ | ✓ | ✗ |
| D | ✗ | ✓ | ✗ | ✓ |

key
✓ = substance present
✗ = substance absent

Which components make up most of the dry mass of a balanced diet?
A. calcium compounds, carbohydrates and fats
B. carbohydrates, fats and proteins
C. fats, proteins and vitamins
D. proteins, vitamins and calcium compounds

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


Which change in environmental conditions could cause this change in 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

The diagrams show four different stages in one heart beat.

What is the correct order for the stages after stage P?
A Q → R → S
B R → Q → S
C R → S → Q
D S → R → Q

Why does chewing food speed up digestion?
A Bacteria in the food are killed.
B Food is mixed with protease.
C The surface area of the food is increased.
D The taste of food is improved.

Which process in humans does not use energy released from respiration?
A. cell division
B. diffusion of oxygen
C. muscle contraction
D. protein synthesis

The graph shows the results of an experiment to investigate the rate of respiration of an organism at different temperatures.



What explains the difference between the rate of respiration at 50°C and that at 30°C?
A enzymes working faster at 50°C
B enzymes working more slowly at 50°C
C less oxygen available at 50°C
D more oxygen available at 50°C

The diagram shows an experiment to investigate the respiration of yeast.

Which gas is evolved and which new compound is present after 24 hours?
[Table_1]
gas evolved | new compound
A carbon dioxide | ethanol (alcohol)
B carbon dioxide | lactic acid
C oxygen | ethanol (alcohol)
D oxygen | lactic acid

Which function does not occur in the kidneys?
A. breakdown of alcohol
B. removal of excess salts from the blood
C. removal of excess water from the blood
D. removal of urea from the blood

What is urea formed from?
A. amino acids
B. fatty acids
C. glucose
D. glycerol

What is not an effect of consumption of alcohol?
A. liver damage
B. loss of muscle coordination
C. poor self control
D. stimulation of the nervous system

Which labelled part of the eye contains muscle?

Which method of birth control is based on knowing the stage of a woman's menstrual cycle?
A. condom
B. contraceptive pill
C. diaphragm
D. rhythm method

The diagram shows some changes which take place during a woman’s menstrual cycle.
Assuming ovulation occurs on day 14, what is occurring at the time of ovulation?
A a fall in the levels of oestrogen and progesterone
B a fall in the level of progesterone only
C a rise in the level of oestrogen
D a rise in the level of progesterone and fall in the level of oestrogen

Development is defined as an increase in
A. complexity.
B. dry mass.
C. number of cells.
D. size.

In addition to a suitable temperature, what else is always necessary for seed germination?
A. carbon dioxide and sunlight
B. mineral ions
C. sunlight and water
D. water and oxygen

A genetic cross between two organisms may be shown as Gg \times Gg.
What does g represent?
A. a dominant allele
B. a dominant chromosome
C. a recessive allele
D. a recessive chromosome

Some fruit flies have orange eyes and others have red eyes.
If two orange-eyed fruit flies are crossed, their offspring always have orange eyes.
If two red-eyed fruit flies are crossed, their offspring sometimes include both orange-eyed and red-eyed flies.
What can be concluded from these observations?
A. Crossing an orange-eyed fly with a red-eyed fly will produce a 1:1 ratio in the offspring.
B. The allele for orange eyes is dominant.
C. The allele for red eyes is dominant.
D. We could determine which allele is dominant only by doing a cross that produces a 3:1 ratio.

What can be continuously recycled in ecosystems?

[Table_1]

| | carbon | energy | water |
|-----|--------|--------|-------|
| A | ✓ | ✓ | ✗ |
| B | ✓ | ✗ | ✓ |
| C | ✗ | ✗ | ✓ |
| D | ✗ | ✓ | ✗ |

Which diagram shows a pyramid of biomass for a woodland?
[Image_1 with diagrams labeled A, B, C, and D]

Which of the following is an example of a food chain?
A. carnivore → herbivore → producer
B. flower → fruit → seed
C. grass → antelope → lion
D. starch → maltose → glucose

The diagram shows the movements of water between oceans, land and the air. The figures are based on an annual mean precipitation of 100 units.



What is the total of evaporation from the land and transpiration from plants at X?

A 7    B 13    C 16    D 77

What is shown in the diagram?
A. a food web
B. non-cyclical energy flow
C. the carbon cycle
D. the water cycle

The table shows the birth rates and death rates in four countries.
Which country will double its population most quickly?

[Table_1: birth rate/death rate table]

Which two gases \textbf{both} contribute to global warming?
A. carbon dioxide and methane
B. methane and oxygen
C. oxygen and sulfur dioxide
D. sulfur dioxide and carbon dioxide

Lichens are organisms that do not grow well in air containing sulfur dioxide.

Which graph shows the change in number of lichen species from the centre of an industrial city to the countryside 15 km away?