Item 8 refers to the following diagram of an animal cell.
8.
What is the name of the structure labelled Y?
- (A)
Nucleus
- (B)
Cytoplasm
- (C)
Mitochondria
- (D)
Chromosome
Free CXC Integrated Science Paper 1 May/June 2020 past paper from 2020. Includes a worked answer key. Open the PDF, take a timed test, and study with AI on Caribbean AI.
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CSEC Integrated Science Paper 1 May/June 2020 - Free CXC Past Paper with Answers
Free CXC Integrated Science Paper 1 May/June 2020 past paper from 2020. Includes a worked answer key. Open the PDF, take a timed test, and study with AI on Caribbean AI.
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Which of the following word equations represents the process of photosynthesis?
Carbon dioxide + Water Energy Sucrose + Oxygen
Carbon dioxide + Water Energy Glucose + Oxygen
Alcohol + Oxygen → Carbon dioxide + Water + Energy
Oxygen + Glucose → Carbon dioxide + Water + Energy
Antibodies are important in the human body because they
control hormones
protect against diseases
help make red blood cells
regulate blood glucose levels
Which of the following systems is likely to be affected by the presence of dust in the air?
Circulatory
Respiratory
Endocrine
Digestive
Items 4-5 refer to the following parts of a flower.
Which part of the flower forms the seed after fertilization?
Ovule
Ovary
Anther
Filament
Which structure is the site where male gametes are produced?
Ovule
Ovary
Anther
Filament
Which of the following structures BEST completes the path to fertilization in plants?
Petal
Stigma
Stamen
Receptacle
Which of the following methods of birth control is MOST likely to prevent the spread of sexually transmitted infections?
Barrier
Natural
Surgical
Hormonal
Item 8 refers to the following diagram of an animal cell.
What is the name of the structure labelled Y?
Nucleus
Cytoplasm
Mitochondria
Chromosome
A food cupboard should always be kept well ventilated and cool, rather than closed up and warm. The BEST reason for this is that
some bacteria need oxygen to reproduce
bacteria grow more rapidly in the dark than in the light
most bacteria need warm moist places in which to reproduce
warm, humid air is more likely to cause disease than cool, dry air
Item 10 refers to the following diagram of the human digestive tract.
Hydrochloric acid is produced in
I
II
III
IV
Which of the following structures functions as a digestive organ and also produces a hormone?
Liver
Pituitary
Pancreas
Gall bladder
By which of the following processes does water move from the soil into the root hairs of a plant?
Osmosis
Diffusion
Capillarity
Transpiration
Which of the following components of blood protects the body by engulfing bacteria?
Plasma
Platelet
Red blood cell
White blood cell
Item 14 refers to the following diagram of the skeletal system.
The bone labelled X is the
femur
radius
humerus
phalange
Photosynthesis occurs in the
mitochondrion
chloroplast
cell wall
nucleus
Which of the following toxic gases functions by binding to the haemoglobin in the red blood cells?
Chlorine
Ammonia
Sulphur dioxide
Carbon monoxide
The structure responsible for the transfer of characteristics from parents to offspring is the
cell membrane
chromosome
cytoplasm
vacuole
Which of the following statements about respiration is true?
Anaerobic respiration produces more energy than aerobic respiration.
Anaerobic respiration requires oxygen while aerobic respiration does not require oxygen.
Aerobic respiration requires oxygen while anaerobic respiration does not require oxygen.
Aerobic respiration produces oxygen while anaerobic respiration produces carbon dioxide.
Which of the following are significant sources of air pollution? I. Oil spills II. Volcanic eruptions III. Extensive use of cars
I and II only
I and III only
II and III only
I, II and III
The amount of water entering the tissues of the body is controlled by
egestion
excretion
nutrition
osmoregulation
Which of the following processes are associated with excretion by the kidneys? I. Filtration II. Evaporation III. Reabsorption
I and II only
I and III only
II and III only
I, II and III
Item 22 refers to the following diagram of the eye.
Which structure transmits impulses to the brain?
I
II
III
IV
Which electrical component is designed to melt and break a circuit if too much current passes through it?
Fuse
Flex
Plug
Switch
Which of the following symbols represents a switch?
Diagram of a switch
Diagram of a battery
Diagram of a voltmeter
Diagram of a switch
Which of the following organisms is a parasite?
Rat
Fly
Tick
Cockroach
The type of pest control which involves the use of a predator is called
biological control
mechanical control
chemical control
sanitary control
Solar energy is transferred through space by
radiation
convection
conduction
evaporation
Solar energy is transferred through space by (A) radiation (B) convection (C) conduction (D) evaporation
Item 28 refers to the following diagram showing methods of heat transfer.
evaporation
conduction
convection
radiation
Item 29 refers to the following picture of an athlete jumping over a hurdle.
Heat
Sound
Kinetic
Potential
The formula for calculating current passing through fuses is
voltage power
power voltage
power voltage
power power
Which of the following is NOT a conductor of electricity?
Carbon
Copper
Plastic
Iron
The unit of current is the
ohm
volt
watt
ampere
In which TWO circuits are the bulbs wired in parallel?
I and II
I and IV
II and III
III and IV
Which equipment protects a person from toxic fumes?
Ear protector
Goggles
Safety clothing
Respirator
The diagram is an example of
a fixed pulley
a simple lever
an inclined plane
a movable pulley
Which of following formulae is used to calculate the mechanical advantage (MA) of a machine?
MA =
MA =
MA = Effort - Load
MA = Effort × Load
Which of the following are properties of aluminium alloys that make them suitable for the manufacture of aircraft and boats?
I. Light II. Strong III. Expensive
I and II only
I and III only
II and III only
I, II and III
Which of the following characteristics represent MOST non-metals? I. Insulate against both heat and electricity II. Low boiling points III. High melting point
I and II only
I and III only
II and III only
I, II and III
The rusting of iron is an example of
reduction
oxidation
precipitation
neutralization
Windows made from steel will rust quickly by the seaside. This is because the air by the seaside has a high concentration of
oxygen
iodine vapour
carbon dioxide
sodium chloride
Item 41 refers to the following safety symbols, I, II and III, found on three bottles of chemicals in a school laboratory.
I II III
Which chemicals must be handled with EXTREME care and preferably by the teacher?
I and II only
I and III only
II and III only
I, II and III
A substance, X, has a pH of 2. This means that X is
a salt
a base
an acid
an alkali
The following data were obtained in an experiment to investigate the best soil pH for different crops. Which crop grows best in neutral soil?
4.0–6.0
6.0–8.0
8.0–10.0
10.0–12.0
Hard water is referred to as water that
is frozen
contains alcohol
contains a lot of chemicals
does not easily form lather with soap
Items 45-46 refer to the following diagram of the solar system.
Earth is labelled
W
X
Y
Z
Saturn is labelled
W
X
Y
Z
Item 47 refers to the following diagram which shows part of a nitrogen cycle.
During which of the processes labelled I, II, III and IV is excretion occurring?
I
II
III
IV
Decayed organic matter in soil is called
sand
humus
sediment
limestone
Which of the following organisms is NOT eaten by snakes?
Toad
Squirrel
Predaceous insect
Herbivorous insect
A non-moving boundary between two air masses is called
a cold front
a warm front
a stationary front
an occluded front
The eye of a hurricane is the
region with the lowest pressure
path along which the hurricane is moving
region in which the hurricane is located
region where the winds reach maximum speed
Which of the following processes results in water moving from the ocean to the atmosphere?
Respiration
Precipitation
Evaporation
Condensation
Which of the following methods involves the settling of heavy suspended material?
Filtration
Distillation
Chlorination
Sedimentation
Which of the following fishing methods is LEAST efficient for commercial purposes?
Drift nets
Long lines
Hand lines
Trawl nets
The increased pressure encountered by divers at large depths below sea level can affect the
ears
eyes
nose
mouth
Which of the following is NOT a water safety device?
Life raft
Life jacket
Inflatable tube
Inflatable balloon
The type of energy contained in fossil fuels is
solar
kinetic
chemical
electrical
Which of the following is NOT associated with the use of fossil fuels?
Erosion
Acid rain
Pollution
Global warming
Item 59 refers to the following diagram which represents the passage of air through the engine of a jet plane.
The direction in which the plane is moving is
X to Y
Y to X
P to Q
Q to P
Which of the following diagrams represents an object in stable equilibrium?
Ball on a convex surface
Pyramid on its base
Vase of flowers on a flat surface
Ball on a flat surface