Download Revision 1 Q1. Which of the following statements is true? A. A cell is

Revision 1
Q1. Which of the following statements is true?
A. A cell is the basic unit for animals only.
B. A multicellular organism has more than one cell in its body.
C. Plant cells and animal cells only differ in terms of cell wall.
D. A unicellular organism does not need a nucleus to function.
Plants and animals are examples of multicellular organisms. They contain
millions of cells in their body.
Q2. Which of the following characteristics is true for cell walls?
A. They restrict the movement of substances across the cell.
B. They support the cellular structure in animal cells from bursting when water enters
the cell excessively.
C. They are made up of cellulose that cannot be digested by animals easily.
D. They are found in some animal cells.
Extra: They are the fibres in our diets to help our bowel movement.
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Q3. What is the name of the system that consists of brain and spinal cord in human
beings?
A. The reproductive system
B. The digestive system
C. The circulatory system
D. The nervous system
Nervous system
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Q4. Which of the following organs are parts of the respiratory system?
A. heart and blood vessels
B. sperm duct and penis
C. trachea and bronchi
D. mouth and oesophagus
Q5. Which of the following organelles are collectively called protoplasm?
A. Chloroplast, nucleus, cell wall
B. Cell wall, cell membrane, nucleus
C. Nucleus, cell membrane, cytoplasm
D. Cell wall, cell membrane,
Protoplasm is the living contents of a cell that is surrounded by a plasma
membrane. Cell wall is not part of the protoplasm. Animal has protoplasm but
no cell wall.
Q6. Which of the following organelles in a cell allows energy transformation from
chemical energy to heat energy to take place?
A. Nucleus
B. Cytoplasm
C. Chloroplast
D. Cell membrane
Cytoplasm is the site where chemical processes in the cell take place.
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Q7. Which of the following terms correctly describes a group of organ systems that
performs similar tasks in a systematic and coordinated manner?
A. Organs
B. Organ systems
C. Organism
D. Cells
Structure
Characteristics
Tissue
A large number of similar
cells performing a particular
function
Organ
System
Examples
Plants: Epidermal tissue, photosynthetic
tissue, supporting tissue
Animals: Epithelial tissue, muscle tissue,
nerve tissue
Two or more tissues grouped Heart (muscle, blood and connective
together, carrying out the
tissues)
same function.
Brain (nerve and connective tissues)
Two or more organs working Digestive, circulatory, nervous,
together in the same function respiratory, excretory, reproductive
system
Q8. Which of the following animals cannot control over their own body temperature?
A. Chimpanzees
B. Chameleons
C. Hummingbirds
D. Rodents
Cold-blooded animals cannot control their body temperature. Chameleons are
reptiles.
Fish
 They are cold blooded
Amphibians
Reptiles
 They are cold blooded.
 They are cold blooded.
 Their bodies are
 They have moist skin
 They have leathery skin
covered with slimy scales.
which is not covered by
which is covered with dry
scales or hair.
scales.
 They have gills for
 They live on both land
 They always lay their
breathing.
and water but always lay
eggs on land.
and live in water.
their eggs in water.
 They have fins for
 They have four legs.
swimming.
 Their eggs have soft
shells
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Birds
Mammals
 They are warm blooded.
 They are warm blooded.
 Their bodies are covered with feathers.  Their bodies are covered with hair or
fur.
 They have beaks (no teeth) for
 Mothers produce milk for their babies
feeding.
(suckle their young).
 They lay eggs with hard shells
Q9. The descriptions of a plant kingdom are as follows:
I. Non-flowering
II. Reproduce by seed
Ill. Growth on land
What could be this plant kingdom?
A. Ferns
B. Conifers
C. Mosses
Conifers reproduce by seeds.
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D. Hibiscus
Mosses
Conifers
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Ferns
Q10. Which of the following characteristics can be observed in hibiscus and rose?
A. Both reproduce by spores.
B. Both do not have true roots.
C. Both have stems and leaves.
D. Both have spores in the capsules.
Both are flowering plants. They have true roots, stems and leaves.
Q11. Which of the following is one of the characteristics for conifers?
A. They have needle-like leaves.
B. They have spores under their leaves.
C. They are flowering-plants.
D. They do not have true roots.
They also reproduce by seeds.
Conifers leaves
Q12. Which of the following organisms does not have true roots but makes its own
food?
A. Mushroom
B. Moss
C. Fungi
D. Conifer
They can carry out photosynthesis.
Q13. Which of the following groups of animals are all vertebrates?
A. Tiger, starfish, rabbit
B. Monkey, rat, roundworm
C. Zebra, dolphin, rat
D. Ant, crab, starfish
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Q14. Which of the following characteristics cannot be used to describe millipedes?
A. Have no backbones
B. Have more than three pairs of legs
C. Have jointed legs
D. Have soft and moist exoskeleton
Millipedes have hard and dry exoskeleton
Q15. An organism has the following characteristics.
I. Breathe through lung
II. Have hair
III. Give birth to young
Which of the following organisms fits the above characteristics?
A. Crocodiles
B. Salamanders
C. Stingrays
Salamanders
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D. Giraffe
Stingrays
Q16. The diagram below shows an apparatus used to investigate osmosis.
After a few hours, which changes in levels will occur and which substances will move
across the membrane?
Level M
Level N
Substance
A.
Fall
Rise
Starch
B.
Fall
Rise
Water
C.
Rise
Fall
Starch
D.
Rise
Fall
Water
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Starch solution has a lower concentration of water, water will move across the
Visking tubing into the starch solution.
Q17. Which statement best explains why gases move across the stomata of green
leaves during warm and sunny day?
A. The gases gain energy which cause them to move more randomly and vigorously.
B. The gases expand. As a result, they move out from the stomata to occupy more
spaces.
C. The gases are warmed. As a result, their densities decrease and they rise up
D. The gases have different concentrations inside and outside of the leaves.
Questions 18 and 19 refer to the diagram below. It shows a typical plant cell after
being placed in a beaker of salt solution for 10 minutes.
Q18. What could be the concentration of the salt solution in the beaker?
A. 5% salt solution
B. 15% salt solution
C. 20% salt solution
D. 25% salt solution
The concentration of salt solution must be higher in the beaker than in the cell,
so that water molecules move out from the cell. The diagram shows a
plasmolysed plant cell.
Q19. Which process is involved to cause this observation of the cell?
A. Osmosis
B. Diffusion
C. Expansion
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D. Active transport
Osmosis is the movement of water molecules from the region of higher water
concentration to a region of lower water concentration through a partially
permeable membrane.
Diffusion is the spreading out of one substance through another due to the
random motion of particles.
Q20. Which of the following is one of the functions of blood capillaries?
A. Allow osmosis of oxygen
B. Allow diffusion of glucose
C Transport oxygen gas
D. Transport plasma
Blood capillaries allow exchange of substances between bloodstream and the living
cells.
Oxygen and useful nutrients move out from the bloodstream into the living cells.
Waste products such carbon dioxide leave the living cells and enter the bloodstream.
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Q21. Which statement best explains why red blood cells have biconcave shape?
A. To transport more carbon dioxide
B. To contain more cytoplasm
C. To decrease its density
D. To increase the rate of oxygen exchange
Red blood cell has a biconcave disc shape to increase surface area to volume
ratio for efficient transportation of oxygen.
Q22. The diagram below shows part of a root hair cell.
Which of the following will take place?
A. Salt will move into the root hair cell from the soil through active transport.
B. Osmosis of water will not take place.
C. Cytoplasm of the cell will change in its volume.
D. No passive movement of substances will take place between the soil and the root
hair cell.
Cytoplasm will decrease in its volume because water molecules move out from
the cell into the surrounding by osmosis.
Q23. Which of the following substances is not transported by plasma?
A. Carbon dioxide
B. Glucose
C. Heat
Oxygen is transported by red hood cells.
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D. Oxygen
Q24. The diagram below shows a simplified diagram of blood circulation in a
mammal.
Which blood vessels transports blood with the highest oxygen content?
A. 1 and 2
B. 2 and 4
C. 1 and 3
D. 3 and 4
Q25. Which statement about the movement of substances across the living cells is
not correct?
A. The direction of the movement of one substance depends on the concentration of
the other substance.
B. No energy is required when a substance moves down its concentration gradient
C. Active transport will take place when mineral salts become scarce in soil.
D. Osmosis can only take place if cell membrane is present in the living cells
The movement of one substance from one region to another depends on its
own concentration gradient iii different regions.
Q26. The diagram below shows a typical root hair cell.
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Which substance does not moves across the cell membrane by simple diffusion
during respiration?
A. Oxygen
B. Carbon dioxide
C. Glucose
D. Excess water
This movement of water across the cell membrane is known as osmosis.
Q27. An onion layer loses its mass after placing in a beaker of solution for a period
of time. Which of the following is not possible to be the solution in the beaker?
A. Pure distilled water
B. Pure starch solution
C. Pure glucose solution
D. Pure mineral salt solution
Pure distilled water has the highest concentration of water molecules,
therefore, there will he net movement of water molecules into the onion cells
to cause them to gain mass.
Q28. The diagram below shows an experiment to investigate the movement of
substances.
Which of the following most likely will not happen to the respective regions 1, 2 and 3
at the end of the experiment?
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A. Region 1 increases in volume.
B. There are same numbers of glucose molecules in these three regions.
C. Regions 2 and 3 have equal volume.
D. Blue-black observed in region 3 when two drops of iodine is added to it.
Starch cannot move across the partially permeable membrane.
Q29. Which statement best explains why the muscular walls of veins is thinner than
that of arteries?
A. They carry deoxygenated blood.
B. They carry smaller volume of blood.
C. They carry less substance in blood.
D. They carry blood that flows slower in the vessels.
Blood flows with a lesser pressure in the veins, so the speed of the blood is
slower. Therefore, it does not require a thicker wall to withstand the low
pressure.
Q30. The diagram below shows the effect of solution Y on a red blood cell after half
an hour.
Which statement is not correct from this observation?
A. Solution Y contains a higher concentration of solute than in the red blood cell
B. The cell membrane of this red blood cell eventually will break apart.
C. The red blood cell is said to be dehydrated.
D. The red blood decreases in its volume and becomes soft.
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The red blood cell shrinks. The appearance of thin red blood cell indicates that
it loses water by osmosis. Therefore, the cell membrane will not burst.
Hypotonic solution means dilute solution or less concentrated solution
Hypertonic solution means concentrated solution or solution with little water.
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Q31. Which of the following is not one of the differences between a red blood cell
and a white blood cell?
A. Presence of haemoglobin
B. Presence of nucleus
C. Presence of cytoplasm
D. Presence of chromosomes
White blood cells and red blood cells both have cytoplasm.
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Q32. The diagram below shows the structure found in a typical human cheek cell.
Which statement about this structure is correct?
A. They restrict the movement of any substances across it by their masses.
B. Water is the only substance that its direction of movement depends on the
presence of this structure.
C. It only allows the substances to move from its region of higher concentration to its
region of lower concentration.
D. It is present in a typical plant cell but is made of cellulose
Osmosis takes place. A partially permeable membrane does not prevent active
transport of a substance.
Q33. Which of the following movements of substances is not an example of diffusion
in plants?
A. Oxygen is given out to the surroundings through the stomata after photosynthesis.
B. Mineral salts are taken in by root hair cells when they have a lower concentration
in soil.
C. Water vapour is lost from the leaves through stomata during a warm and sunny
day.
D. Food is transferred from the leaves to the various parts of the plant after
photosynthesis.
Active transport is a process when a substance moves from its region of low
concentration to its region of high concentration against a concentration
gradient. Energy is involved.
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Q34. Which of the following components transport substances in the circulatory
system?
I. Plasma
A. I only
II. White blood cells
B. Ill only
Ill. Red blood cells
C. I, II and Ill
D. I and Ill
White blood cells do not transport substances. They only fight against
infections.
Q35. Which of the following is not one of the differences between an artery and a
vein?
A. Compositions of blood
B. The size of lumen
C. Thickness of muscular wall
D. Blood flow pressure
Blood flow in both vessels contains the same compositions, i.e. plasma, red
blood cells, white blood cells and platelets.
Q36. The diagram below shows a section from the plant root after taken out from a
red dye solution. Which structure most likely transports substance made in the green
leaves?
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D. This diagram shows the section from the root. The structure which is
stained red is a xylem vessel because xylem vessels transport water
containing the red dyes. Option D is phloem.
Q37. The diagram below shows part of the human circulatory system.
Which substance occurs at a higher concentration in the blood flow 1 than in the
blood flow 2?
A. Oxygen
B. Carbon dioxide
C. Nitrogen
D. Glucose
Blood floss from the lungs to the heart has the highest oxygen concentration
after picking up fresh oxygen front the atmosphere.
Q38. Which of the following blood vessels most likely contains the highest
concentration of dissolved oxygen in the blood vessels?
A. Pulmonary artery
B. Pulmonary vein
C. Aorta
Pulmonary vein receives fresh oxygen from the lungs.
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D. Renal artery
Q39. The diagrams show three types of blood vessels, 1, 2 and 3.
Which of the following describes the characteristics for each type of vessel?
Blood flow under
Location of exchange
Blood flow
high pressure
of substances
controlled by valves
A.
1
2
3
B.
3
1
2
C.
2
3
1
D.
1
3
2
Arteries
Veins
Capillaries
Function carry blood away from carry blood towards the allow exchange of
the heart
heart
substances between
blood and the body
cells
Structure Thick,
elastic
and Thin, less elastic and One-cell thick to allow
muscular wall
less muscular wall
substances
can
diffuse to and from the
cells
Valves
Absent
Present
Absent
Blood
Very fast as blood is Slow as under low Slow as under low
flow
under high pressure
pressure
pressure
In spurts
Smooth flow
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Size of
lumen
Small
Large
Very narrow
Q40. Which of the following is the correct pathway for blood circulation in human?
A. Right atrium  left atrium  left ventricle lungs  right ventricle
B. Lungs  left atrium  left ventricle  right ventricle  right atrium
C. Left ventricle  right atrium  right ventricle  lungs  left atrium
D. Lungs  left ventricle  left atrium  right ventricle  right atrium
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Q41. A plant was placed in jar as shown below. The condition was suitable for the
plant to make food, as there was sunlight and the soil was moist. The air inside the
jar contained carbon dioxide gas which is made up of radioactive carbon element.
The carbon from the gas was incorporated into food during photosynthesis.
After two hours, the plant was removed from the jar. The stem was cut crosssectional. It was then placed on photographic film which became black when
exposed to radioactivity. Which diagram shows the correct positions of the black
spots found on the film?
A. The black spots should only be observed in phloem tissues as they transport food
substances.
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Q42. The diagram below shows a human heart and
its attached vessels.
Which of the following correctly describes the
conditions of the blood in the different vessels?
P
Q
R
A
Oxygenated,
Deoxygenated,
Deoxygenated,
high pressure
low pressure
high pressure
B
Deoxygenated,
Deoxygenated,
Oxygenated,
high pressure
low pressure
high pressure
C
Deoxygenated,
Deoxygenated,
Oxygenated,
low pressure
low pressure
high pressure
D
Oxygenated,
Deoxygenated,
Deoxygenated,
high pressure
high pressure
low pressure
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S
Oxygenated,
high pressure
Oxygenated,
high pressure
Oxygenated,
high pressure
Deoxygenated,
low pressure
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Q43. The diagram below shows part of the human alimentary canal
What is the function of X?
A. To remove solid waste from the body
B. To absorb water into body
C. To take in mineral salts into the body
D. To store solid waste temporarily
It is a rectum.
Q44. Which of the following is not one of the end products of digestion in the small
intestine?
A. Fatty acids
B. Short protein chains
C. Glycerol
D. Glucose
Proteins are broken down into short protein chains in the stomach. In the
small intestine, they are further digested into amino acids.
Q45. Which of the substances is taken into the bloodstream when it reaches the
large intestine?
A. Vitamins
B. Glucose
C. Amino acids
D. Fatty acids and glycerol
Large intestine absorbs mineral salts, vitamins and water. Note that no
chemical digestion takes place in large intestine.
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Q46. The diagram below shows part of the human alimentary canal.
What would happen when part P is removed?
A. Digestion of fats becomes slower
B. No production of bile in the digestive system
C. No secretion of lipase
D. No secretion of hydrochloric acid
Bile breaks up fats into droplets to increase its total surface area so that lipase
can digest them at a faster rate. Bile is produced by the liver. Structure P is
bile duct. The bile secreted by the liver passes through a Y-shaped duct, as
shown in Figure. The bile travels down one branch of the Y shaped duct and
then up the other branch to the gallbladder, a saclike organ that stores and
concentrates bile.
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Q47. Which chemical digestion takes places in the beginning of the human
alimentary canal?
A. Complex protein molecules are broken down into smaller protein molecules.
B. Large and complex food is broken into smaller pieces by the action of chewing.
C. Food is pushed down into the stomach by a long muscular tube.
D. Large and complex starch in food is broken down into maltose.
Starch is digested first in the mouth by salivary amylase. Salivary amylase is
released by the salivary glands.
Q48. Which of the following statements about starch and glucose is correct?
A. They both contain the constituent elements of carbon, hydrogen and oxygen only.
B. Starch can provide twice the amount of energy than glucose in a same amount of
mass.
C. Starch gives blue--black colour with iodine after mixed with salivary amylase.
D. Glucose is the first carbohydrate that is broken down in the mouth of the human
alimentary canal.
Glucose and starch are carbohydrates. Fats are also made up of elements
carbon, hydrogen and oxygen only.
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Q49. The diagram below shows the movement of substances in a muscular tube.
Which of the following regions in the human alimentary canal can this movement be
found?
I. Oesophagus
A. I only
II. Mouth
B. II only
C. I and Ill
As you can see in Figure, alternating contractions
of these muscle layers push the bolus through
the esophagus and into the stomach. This series
of rhythmic muscular contractions and
relaxations is called peristalsis.
Peristalsis is so efficient at moving materials
down the esophagus that you can drink while
standing on your head.
The smooth muscles move the water “up” the
esophagus, against the force of gravity.
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III. Large intestine
D. II and Ill
Q50. Which of the following does not secrete enzymes in the human alimentary
canal?
A. The liver
B. The small intestine
C. The pancreas
D. The stomach
Liver secretes bile.
Q51. The diagram below shows part of the human alimentary canal.
Which statement about structure P is not correct?
A. It is part of the human alimentary canal which carries out chemical digestion of
food
B. Digestion of fatty food substances can only be carried out from the secretion of P.
C. Protease from structure P digests the smaller protein molecules into amino acids.
D. Maltase secreted by structure P completes the digestion of starch into glucose.
P is pancreas. It is an organ associated to alimentary canal but it is not part of
it. It does not carry out chemical digestion. Chemical digestion is carried out in
the small intestine.
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Q52. The diagram below shows part of the human alimentary canal.
Which of the following actions does not take place in structure M?
A. Killing bacteria in food
B. Breaking down proteins chemically
C. Absorption of amino acids
D. Churning action on the digested food
Absorption of simpler food molecules only takes place in the small intestine.
Q53. Which statement best explains why fibres are not taken into the bloodstream in
the small intestine?
A. Fibres are too heavy to move through the wall of the small intestine.
B. Fibres do not have any useful functions in our body, so they are not being
absorbed.
C. Fibres are not able to move across the partially permeable membrane present in
the wall of the small intestine.
D. Fibres cannot move against its concentration gradient from the lumen of the small
intestine into the bloodstream.
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Q54. The diagram below shows the human alimentary canal.
Which regions show the enzyme activities?
A. 1 and 4
B. 1, 3 and 5
C. 2, 3 and 5
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D. 1, 2 and 4
The Human Digestive System. Food breaks down as it moves through the
chambers of the digestive tract. Accessory organs aid in digestion.
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