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Biology iGCSE Topic 1 - 17

Total questions: 71

Worksheet time: 41mins

Name
Class
Date
1.
a)
A
b)
B
c)
C
d)
D
2.
a)
1, 2, 3 and 4
b)
1 and 3
c)
2 and 3
d)
2 and 4
3.
a)
X = Artery
Y = Vein
Z= Capillary
b)
X = Artery
Y = Capillary
Z= Vein
c)
X = Vein
Y = Artery
Z= Capillary
d)
X = Vein
Y = Capillary
Z= Artery
4.
a)
A
b)
B
c)
C
d)
D
5.
a)
A
b)
B
c)
C
d)
D
6.
a)
A
b)
B
c)
C
d)
D
7.
a)
A
b)
B
c)
C
d)
D
8.
a)
A
b)
B
c)
C
d)
D
9.
a)
A
b)
B
c)
C
d)
D
10.
a)
A
b)
B
c)
C
d)
D
11.
a)
A
b)
B
c)
C
d)
D
12.
a)
A
b)
B
c)
C
d)
D
13.
a)
A
b)
B
c)
C
d)
D
14.
a)
A
b)
B
c)
C
d)
D
15.
a)
cell membrane = X
cell wall = Y
cytoplasm = Z
b)
cell membrane = X
cell wall = Z
cytoplasm = Y
c)
cell membrane = Z
cell wall = Y
cytoplasm = X
d)
cell membrane = Z
cell wall = X
cytoplasm = Y
16.

Enzymes are an example of

a)

Lipids

b)

Carbohydrate

c)

Protein

d)

Nucleic Acid

17.
In the diagram, what is letter A? 
a)
product
b)
substrate
c)
enzyme-substrate complex
d)
active site
18.
An enzyme speeds up a reaction by
a)
lowering the activation energy.
b)
raising the activation energy.
c)
releasing energy.
d)
absorbing energy.
19.

What happens when enzymes are heated to a high temperature?

a)

The enzymes die.

b)

The shape of the enzyme are changed and it denatures

c)

The enzymes' amino acid sequence changes.

d)

The enzymes remain the same

20.
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 .
21.

What deficiency disease can be caused by IRON deficiency?

a)

Anaemia

b)

Scurvy

c)

Osteoporosis

d)

Rickets

22.

Select the TWO organs that make up the CNS (Central Nervous System).

a)

brain

b)

heart

c)

lungs

d)

spinal cord

e)

nose

23.

Select all of the biological molecules that make up our body.

a)

proteins

b)

alkanes

c)

carbohydrates

d)

nucleic acids

e)

lipids

24.

Which of the following nutrients supply the MOST energy ?

a)

glucose

b)

starch

c)

proteins

d)

lipids

25.
What is the main function of the respiratory system?
a)
To break food down
b)
Circulate the blood
c)
Supply the blood with oxygen
26.
What is the name of the tiny air sacs in your lungs?
a)
Bronchioles
b)
Ravioli
c)
Alveoli
d)
Bronchus
27.

Which term describes the physical movements in the thorax which bring fresh air to the alveoli and remove stale air?

a)

gas exchange

b)

respiration

c)

ventilation

d)

circulation

28.

Ventilation maintains a high concentration of oxygen in the alveoli.


Which one of the following maintains a low concentration of oxygen in blood capillaries that are close by?

a)

respiration

b)

perspiration

c)

circulation

d)

evaporation

29.

What is the main reason for placing an oxygen mask on a patient, who has a severe lung disease?

a)

It makes them feel less tired

b)

It increases the concentration gradient for oxygen between the alveoli and blood capillaries

c)

It allows aerobic respiration to occur

d)

It allows oxygen to diffuse faster into the alveoli from blood capillaries

30.

The extracellular matrix (Yellowish liquid) of blood is called

a)

plasma

b)

erythrocytes

c)

buffy coat

d)

lympocytes

31.
These blood cells are the protectors and help fight off disease.
a)
Red blood cells
b)
White blood cells
c)
Plasma
d)
Platelets 
32.
These blood cells deliver oxygen to the parts of the body.
a)
Red
b)
White
c)
Patelets
d)
Plasma
33.
_______ is made mostly of water and makes up about 55% of the blood
a)
Plasma
b)
Platelets 
c)
Red blood cells
d)
White blood cells
34.

Which substance(s) is(are) used up in photosynthesis?

a)

Chlorophyll

b)

Light

c)

Oxygen

d)

Water

35.

Which region in the leaf of a green plant contain(s) phloem?

a)

Palisade mesophyll

b)

Spongy mesophyll

c)

Upper epidermis

d)

Vascular bundles

36.

a)

A

b)

B

c)

C

d)

D

37.

a)

A

b)

B

c)

C

d)

D

38.

a)

A

b)

B

c)

C

d)

D

39.

a)

A

b)

B

c)

C

d)

D

40.

a)

A

b)

B

c)

C

d)

D

41.

a)

A

b)

B

c)

C

d)

D

42.

a)

A

b)

B

c)

C

d)

D

43.

a)

A

b)

B

c)

C

d)

D

44.

Containing two complete sets of chromosomes, one from each parent. (Somatic cells --(body cells) are described as this...

a)

haploid

b)

Gametes

c)

Chromatid

d)

diploid

45.

The long, fiber like part of a neuron which the cell sends information to receiving neurons

a)

axon

b)

dendrite

c)

myelin

d)

Node of Ranvier

46.

The part of the neuron that receives messages from adjacent neurons

a)

axon

b)

axon terminal

c)

dendrite

d)

neuron

47.

Identify #1

a)

axon

b)

cell body

c)

myelin sheath

d)

nucleus

48.

An example of a reflex action includes

a)

Touching a butterfly

b)

Brushing your hand against the side of your body

c)

Touching a hot stove

d)

Your legs moving as you walk

49.

In a reflex arc, the sensory neuron leads to the ___________ and the motor neuron leads to the __________

a)

Spinal cord, CNS

b)

CNS, muscle

c)

relay neuron, muscle

d)

Muscle, CNS

50.
Which number shows the motor neuron?
a)
4
b)
5
c)
2
d)
1
51.

How does neurotransmitter move across a synapse?

a)

diffusion

b)

osmosis

c)

active transport

d)

electrical impulse

52.

Blood returning from the body enters the

a)

right atrium

b)

left atrium

c)

left ventricle

d)

right ventricle

53.

Which type of blood vessel has a thick elastic wall?

a)

Veins

b)

Arteries

c)

Capillaries

54.

What causes the blood to be the distinct red colour?

a)

Haemoglobin

b)

Glucose

c)

Hormones

d)

Oxygen

55.

Into which chamber of the heart does oxygenated blood enter?

a)

left atrium

b)

left ventricle

c)

right atrium

d)

right ventricle

56.

What is the name of the vessels that supply the muscle in the heart walls with blood?

a)

cardiac arteries

b)

cardiac veins

c)

coronary arteries

d)

capillaries

57.

Which structure is common to plant and animal cells?

a)

chloroplast

b)

central vacuole

c)

mitochondrion

d)

cell wall

58.

Which of the following tests for starch?

a)

Iodine

b)

Benedict's

c)

Biuret

d)

Emulsion

59.

Which of the following tests for glucose?

a)

Iodine

b)

Benedicts

c)

Biuret

d)

Emulsion

60.

The building blocks of lipids are

a)

Starches

b)

Fatty acids and Glycerol

c)

Sugars

d)

Amino Acids

61.

Structure 16 is the

a)

pancreas

b)

salivary glands

c)

larynx

d)

oesophagus

62.

Produces bile

a)

Liver

b)

Gall bladder

c)

Stomach

d)

Pancreas

63.

What is the main energy change that happens in photosynthesis?

a)

chemical --> light

b)

light --> kinetic

c)

light --> chemical

d)

kinetic --> light

64.

which components make up most of the dry mass of a balanced diet?

a)

calcium, carbohydrates, fats

b)

carbohydrates, fats, proteins

c)

fats, protein, vitamins

d)

proteins, vitamins, calcium

65.

Tasha is 55 and has been diagnosed with type 2 diabetes which condition is the most likely cause of her diabetes?

a)

anaemia

b)

obesity

c)

type 1 diabetes

d)

vitamin A deficiency

66.

Radial muscles are one set of muscles involved in the iris reflex. Name the other set.

a)

Circular muscles

b)

Suspensory ligaments

c)

Ciliary muscles

d)

Biceps

67.

Which part of the eye provides a link to the brain?

a)

Cornea

b)

Lens

c)

Conjuctiva

d)

Optic nerve

68.
What is this?
a)
Lens
b)
Pupil
c)
Iris
d)
Cornea
69.

Surrounds the plant cell and maintains the cell shape and structure.

a)

Cell wall

b)

Cell membrane

c)

Nucleus

d)

Ribosome

70.

Makes protein for the cell.

a)

Ribosome

b)

Mitochondria

c)

Vacuole

d)

Cytoplasm

71.
a)

A

b)

B

c)

C

d)

D

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