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IGCSE Mock Exam Quizziz Biology

Total questions: 104

Worksheet time: 2hrs 50mins

Name
Class
Date
1.

All living things are composed of. . . .(building blocks of living things)

a)

Energy

b)

Cells

c)

Atoms

d)

Bugs

2.
A plant growing towards the light is an example of 
a)
reproduction.
b)
responding to a stimuli.
c)
metabolism.
d)
homeostasis.
3.

What is the function of this organelle?

a)

Sac that stores water, nutrients, and waste products

b)

Regulates what enters and leaves the cell

c)

Structures that transport and ship proteins like UPS

d)

Cite of cellular respiration also known as the powerhouse of the cell

4.

What can only be found in plant cells?

a)

Chloroplast

b)

Vacuole

c)

Nucleus

d)

Cell membrane

5.

What cell part is NOT found in all cells

a)

Cytoplasm

b)

Genetic material

c)

Cell membrane

d)

Cell wall

6.

What is the function of this part of the cell?

a)

Structure

b)

Flexability

c)

Regulates what comes in and out of the cell

d)

Stores genetic information

7.

These cells remove mucus and dust out of the airways of animals.

a)

Red blood cells

b)

Palisade mesophyll cells

c)

Ciliated cells

d)

Root hair cells

8.
To calculate magnification we use......
a)
image size x actual size
b)
image size ÷ actual size
c)
actual size ÷ image size
9.
To calculate image size we use.....
a)
actual size x magnification
b)
magnification ÷ actual size
c)
actual size ÷ magnification
10.
If a scale bar measures 32 mm and it states it's length is 100 µm, what is the magnification?
a)
320 x
b)
3,200 x
c)
0.32 x
d)
32,000 x
11.

Which cell is in an isotonic environment?

a)

A

b)

B

c)

C

d)

None of them are isotonic

12.

Movement of solute, NOT WATER, through the cell membrane from high to low concentration.

a)

diffusion

b)

active transport

c)

facilitated diffusion

d)

osmosis

13.
If you are stranded at sea why is it safer to drink urine than sea water?
a)
One cup of sea water has enough sodium to poison you.
b)
Sea water is hypertonic to your cells and will only further dehydrate you.
c)
Sea water is too isotonic to your cells and you will absorb too much water.
d)
The salt will cause high blood pressure and you will die from a stroke.
14.

What type of molecule contains glycerol?

a)

simple carbohydrate

b)

fat

c)

complex carbohydrate

d)

protein

15.

What type of molecule contains amino acids?

a)

simple carbohydrate

b)

fat

c)

complex carbohydrate

d)

protein

16.

Select all types of molecule which are used as energy store molecules

a)

starch

b)

fat

c)

protein

d)

glucose

17.

Select the TRUE statement below

a)

Glucose and Lactose are complex carbohydrates

b)

Glucose and Glycogen are simple carbohydrates

c)

Glycogen and Lactose are complex carbohydrates

d)

Glucose and Lactose are simple carbohydrates

18.
A large molecule made up of many similar or identical subunits.
a)
lipids
b)
polymer
c)
monomer
d)
monosaccharide
19.
Which of the following tests for protein?
a)
Iodine
b)
Benedicts
c)
Biuret
20.
Which test requires heat?
a)
Benedicts
b)
Biuret
c)
Iodine
21.
Enzymes are considered to be 
a)
Lipids
b)
Carbohydrate
c)
Protein
d)
Nucleic Acid
22.
What is the purpose  of an enzyme?
a)
give permission for the reaction
b)
raise activation energy
c)
speed up reactions
d)
control how many reactions occur
23.
Where do substrates bind on an enzyme?
a)
voltage-gated channels
b)
surface receptor
c)
calcium channels
d)
active site
24.
What is structure A?
a)
Substrate
b)
Active site
c)
Enzyme
d)
Products
25.
What 3 letters do enzymes typically end in?
a)
-ose
b)
-ase
c)
-ese
d)
-tic
26.
What is the name for the mechanism of enzyme activity?
a)
Lock and key
b)
jigsaw puzzle
c)
hammer and nail
d)
two hands pattern
27.
At 40 degrees Celsius, your biological enzymes will...
a)
Functional optimally
b)
Denature
c)
Wait until the temp. increases
d)
Wait until the temp. decreases
28.
Which of the following conclusions can be drawn from this graph?
a)
The optimum pH of the enzyme is 6.6.
b)
The optimum pH of the enzyme is 5.8
c)
The enzyme’s activity increases as pH increases 5.0 to 9.0
d)
The enzyme’s activity is greater around pH of 8.0 .
29.
What are the enzymes called when they are at low temperature? 
a)
denatured
b)
Killed
c)
inactive
d)
normal
30.
Enzymes are considered to be 
a)
Lipids
b)
Carbohydrate
c)
Protein
d)
Nucleic Acid
31.

Carbon dioxide is absorbed through the

a)

Stoma

b)

Cuticle

c)

Vessel

d)

Palisade Cells

32.

In order to make proteins, plants need to absorb

a)

Magnesium Ions

b)

Nitrate Ions

c)

Sucrose

d)

Carbon Dioxide

33.

The orange colored part of the leaf in the diagram refers to the

a)

Vessels

b)

Stoma

c)

Epidermis

d)

Mesophyll Layer

34.

The following are leaf adaptations for photosynthesis EXCEPT

a)

Thin

b)

Contains Chlorophyll

c)

Contains Root Hair

d)

Contains Stoma and Guard Cells

35.

The part of the leaf that enables it to hold water by stopping water from escaping through evaporation

a)

Cuticle

b)

Palisade Cells

c)

Xylem

d)

Epidermis

36.

Part of the leaf which allows the diffusion of gases to occur

a)

Palisade Cells

b)

Spongy Mesophyll Cells

c)

Epidermis

d)

Phloem

37.

The following compounds goes in and out of the stoma EXCEPT

a)

Oxygen

b)

Glucose

c)

Carbon Dioxide

d)

Water

38.

Which of these are limiting factors for photosynthesis? Choose 3 answers.

a)

Light intensity

b)

CO2 concentration

c)

Temperature

d)

Light

e)

CO2 levels

39.

What is limiting the rate of photosynthesis at point A?

a)

CO2 concentration

b)

Nothing

c)

Light intensity

d)

Number of chloroplasts

40.

Which of these is the correct equation for photosynthesis?

a)

6O2 + C6H12O6 --> 6CO2 + 6H2O

b)

6O2 + 6CO2 --> C6H12O6 + 6H2O

c)

6CO2 + 6H2O --> 6O2 + C6H12O6

d)

6CO2 + 6H2O --> O2 + C6H12O6

41.

When testing a leaf for starch why is it necessary to boil it in ethanol first?

a)

To break open the plant cells

b)

To release the starch form the cells

c)

To kill the plant cells

d)

To remove the green chlorophyll from the leaf

42.

Which essential nutrient is primarily responsible for building muscle and repairing the body?

a)

Carbohydrates

b)

Protein

c)

Fats/Oils

d)

Water

43.

Which vitamin below is the water soluble vitamin

a)

C

b)

K

c)

D

d)

E

44.

What element is generally absent in carbohydrates?

a)

Carbon

b)

Hydrogen

c)

Oxygen

d)

Nitrogen

45.

Where is Bile produced?

a)

The liver

b)

The Gallbladder

c)

The Pancreas

d)

The Intestine

46.

Which definition correctly describes a balanced diet?

a)

a diet in which we eat fruits and vegetables

b)

A diet in which we eat equal amounts of protein, carbohydrates and fat

c)

A diet in which contains carbohydrates, proteins, fats, vitamins, minerals, water, fibre in the correct amounts and proportions for us

d)

A diet in which we eat no more than 2000 calories a day

47.

Which nutrients do pepsin and trypsin break?

a)

Minerals

b)

Fats

c)

Proteins

d)

Carbohydrates

48.

An experiment is carried out where bread is mixed with human saliva. Predict what will happen

a)

The fat is broken down to fatty acids and glycerol

b)

The proteins are broken down to amino acids by protease (pepsin)

c)

The starch is broken down by amylase to maltose

d)

all of the above

49.

The diagram shows a villus. Which structure is label A pointing at?

a)

microvilli

b)

Epithelium

c)

Blood capillaries

d)

Lacteal

50.

Which structures along the digestive tract increases the surface area for absorption?

a)

receptors

b)

Bile ducts

c)

Lacteals

d)

Villi

51.

The body absorbs water as it passes through the digestive system. Where is most of the water absorbed?

a)

small intestine

b)

Large intestine

c)

Stomach

d)

Esophagus

52.

How many molars are there in your mouth?

a)

4

b)

8

c)

12

d)

16

53.

What layer of the teeth is labeled?

a)

Dentine

b)

Enamel

c)

pulp

d)

gum

54.

Which chemical is found in toothpaste to strengthen teeth

a)

Chlorine

b)

Calcium

c)

Fluorine

d)

Sodium hydroxide

55.

What does protein do?

a)

It gives you energy

b)

It provides a layer of insulation

c)

It repairs and makes cells

d)

It reduces the chances of diseases

56.
Tube that carries swallowed food to the stomach
a)
esophagus
b)
liver
c)
pancreas
d)
rectum
57.
Peristalsis refers to
a)
one of the digestive organs
b)
the action of the stomach
c)
heart rate increasing
d)
smooth muscles moving food through the digestive system
58.
A lump of food that you swallow is called a __________.
a)
bolus
b)
peristalsis
c)
alimentary canal
d)
spittal
59.
The organ that stores bile.
a)
gall bladder
b)
stomach
c)
liver
d)
appendix
60.

Which of these might be the pH of the stomach?

a)

12.7

b)

2.0

c)

6.4

d)

8.8

61.
Transpiration is
a)
the movement of water through a plant from the roots up the stem
b)
the loss of water from the leaves of a plant by the process of evaporation
c)
the flow of water into plant roots by osmosis from the soil
d)
the process of minerals and sugars moving through plant veins
62.
Why is the evaporation of water from leaves important?
a)
It cools leaves and helps move water up the plant.
b)
It makes the plant wilt
c)
It helps the plant to respire
63.
Xylem vessel elements are strengthened by
a)
lignin
b)
cellulose
c)
melanin
d)
pericycle
64.
Why does temperature have an effect on the rate of photosynthesis?
a)
Higher temperature allows carbon dioxide to diffuse into the leaves faster.
b)
Higher temperature allows water to be transported to the leaves faster.
c)
Higher temperature allows the stomata to open wider.
d)
Higher temperature allows the enzymes to function better.
65.

This part of the transport system in plants is made up of living cells.

a)

Xylem

b)

Shoots

c)

Phloem

d)

Leaves

66.

what is A

a)

xylem

b)

cambium

c)

phloem

d)

cortex

67.

diagram shows cross section of a

a)

leaf

b)

root

c)

stem

68.
______________ are the smallest blood vessels.
a)
Arteries
b)
Veins
c)
Capillaries
69.
The circulatory system works with the ___________ system to provide our body with oxygen.
a)
respiratory
b)
digestive
c)
muscular
d)
skeletal
70.
The main function of the circulatory system is 
a)
To give the body structure and support
b)
Excrete waste
c)
transport blood, nutrients, and gases throughout the body
d)
to transport messages from the body to the brain
71.

The FREQUENCY of heart contractions is...

a)

heart rate

b)

blood pressure

c)

respiratory rate

d)

voluntary muscle contraction

72.
Identify
a)
Left atrium
b)
Right atrium
c)
Left ventricle
d)
Right ventricle
73.
Identify
a)
Pulmonary veins
b)
Pulmonary artery
c)
Aorta
d)
Vena cava
74.
Identify
a)
Left atrium
b)
Right atrium
c)
Left ventricle
d)
Right ventricle
75.
This chamber of the heart RECEIVES blood returning from the body
a)
Right Atrium
b)
Right Ventricle
c)
Left Atrium
d)
Left Ventricle
76.

This chamber of the heart RECEIVES oxygen rich blood back from the lungs

a)

Right Atrium

b)

Left Atrium

c)

Right Ventricle

d)

Left Ventricle

77.

Arteries

a)

carry oxygenated blood to the heart

b)

carry oxygenated blood away from the heart

c)

carry deoxygenated blood to the heart

d)

carry deoxygenated blood away from the heart

78.

Formed in the bone marrow, they are small cells that have important function of clotting of the blood

a)

white blood cells

b)

red blood cells

c)

platelets

d)

leukocytes

79.

White blood cells

a)

are mostly water and transport substances around the body

b)

carry oxygen around the body

c)

protect the body from disease

d)

clot the blood

80.

Type of circulation that refers to blood flow from the heart to the lungs and back to the heart again?

a)

Systemic circulation

b)

Renal circulation

c)

Portal circulation

d)

Pulmonary circulation

81.

Coronary arteries...

a)

supply the heart muscle cells with a supply of blood.

b)

supply the brain cells with a supply of blood.

c)

contain deoxygenated blood.

d)

when clogged, cause a stroke.

82.

Name part M.

a)

Tricuspid valve

b)

Semilunar valve

c)

Bicuspid valve

d)

Mitral valve

83.
The trachea leads to the...
a)
Bronchioles
b)
Bronchi
c)
Esophagus
d)
Pulmonary Vessel
84.

The air sacs that are covered with capillaries where gas exchange takes place is _________?

a)

Bronchi

b)

Trachea

c)

Oxygen

d)

Alveoli

85.
We can test the presence of carbon dioxide in exhaled air by bubbling it into .................... . 
a)
limewater
b)
lime juice
c)
lime
d)
water
86.
Identify the diaphragm.
a)
C
b)
D
c)
E
d)
F
87.

What are the main muscles of inhalation?

a)

The diaphragm and intercostal muscles

b)

The scalenes and the abdominal muscles

c)

The diaphram and abdominal muscles

d)

The diaphragm and latissimus muscles

88.

A contraction of the diaphragm during inhalation causes it to flatten. What else does the contraction result in?

a)

An increase in the volume of the thoracic cavity

b)

Increase in alveolar pressure

c)

A decrease in lung volume

d)

A decrease in the volume of the thoracic cavity

89.

Which addictive component of tobacco smoke causes an increase in blood pressure?

a)

carbon monoxide

b)

carcinogens

c)

nicotine

d)

tar

90.
Tiny, hair-like projections that move together in sweeping motion
a)
ribcage
b)
trachea
c)
pharynx
d)
cilia
91.

What adaptations does the alveoli have for efficient gas exchange?

a)

thick walls

b)

thin walls

c)

small surface area

92.
What cells in the body may undergo lactic acid fermentation during exercise? 
a)
Muscle cells
b)
Fat cells
c)
Liver cells
d)
Skin cells
93.
Cellular respiration is called an aerobic process because it requires
a)
light
b)
exercise
c)
oxygen
d)
glucose
94.
Which of the following is true about anaerobic respiration?
a)
It is a fast process
b)
It allows organisms to live in places with little oxygen
c)
It evolved before aerobic respiration
d)
all of the above
95.

First trophic level of a ecological pyramid includes

a)

producers

b)

primary consumers

c)

secondary consumers

d)

tertiary consumers

96.

what does an energy pyramid show?

a)

Energy flow in a community

b)

Longest lifespans

c)

The stronger animal higher it is on the pyramid

97.

A consumer gets energy by doing what?

a)

Making it themselves

b)

Breaking down biotic wastes and dead organisms and returning raw materials to the ecosystem

c)

Soaking it up from the ground

d)

Feeding on other organisms

98.

In the energy pyramid , how many of the energy in each level gets lost as heat ?

a)

80%

b)

90%

c)

10%

d)

20%

99.

How are primary consumers different from secondary consumers?

a)

Primary consumers eat only plants;secondary consumers eat other consumers.

b)

Primary consumers eat other consumers;secondary consumers eat only plants.

c)

primary consumers eat plants and other consumer;secondary consumers eat plants and decompose matter

d)

Primary consumers eat plants and decompose matter ;secondary consumers consumers eat plants and other consumers.

100.
Which animal is the apex predator?
a)
hawk
b)
lizard
c)
snake
d)
grass
101.
The arrows in a food chain or web represents what?
a)
They point to the organism that is being eaten.
b)
It shows how sunlight flows within an ecosystem.
c)
They show what direction the energy is flowing between organisms. 
d)
They represent how water is transferred within a habitat.
102.

Which of the following is NOT a source of nitrates and phosphates into a river?

a)

Fertilizers

b)

Animal waste

c)

Wastewater

d)

Burning fossil fuels

103.

What can be a source of nitrates for eutrophication in rivers?

a)

fertilisers

b)

plastic bottles

c)

paper

d)

sewage

104.

In eutrophication, what does 'algal bloom' refer to?

a)

The rapid increase in the number of bacteria

b)

The rapid increase in the number of plants

c)

The rapid decrease in the number of fish

d)

The rapid increase in the amount of nitrates in the river

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