Placement Test - IGCSE BIOLOGY V01

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1) The photomicrograph shows a plant cell. The length of line XY is 90 mm. The actual length of the cell is 30 µm.
 
no1.png
 
What is the magnification of the photomicrograph?
x300
x3000
x33000
x330000
2) The diagram shows the movement of the glucose molecules across a cell membrane.
no2.png

Which statement describes molecule T?

It is a fat molecule used to transport glucose down a concentration gradient.
It is a fat molecule used to transport glucose against a concentration gradient.
It is a protein molecule used to transport glucose down a concentration gradient.
It is a protein molecule used to transport glucose against a concentration gradient.

3) During inspiration, the processes listed take place.

P volume of the thorax increases

Q air rushes into the lungs

R pressure in the thorax decreases

S external intercostal muscles contract

T diaphragm moves down, ribs move upwards and outwards

What is the correct sequence for these processes?

Q → P → S → R → T
S → T → P → R → Q
Q → P → S → T → R
S → Q → R → P → T
4) Which row shows where glucose will be found in the body of a healthy human after eating a meal?
 
 

renal artery

renal vein

glomerulus

nephron

ureter

A

yes

no

yes

yes

yes

B

yes

yes

no

no

no

C

yes

yes

yes

yes

no

D

no

yes

no

no

yes
 
A
B
C
D
5) A few yeast cells were placed in a container of nutrient solution.
 
The graph shows how their population size changed over time.
no5.png

Which row shows when the reproduction rate was greater than the death rate for the numbered phases on the graph?

  reproduction rate greater than death rate

1

2

3

4

A

/

/

/

x

B

/

/

x

x

C

/

x

x

x

D

x

/

/

/
A
B
C
D

6) The diagram shows a leaf on a plant used in a photosynthesis experiment. At the start of the experiment, there is no starch in the leaf.

A piece of black paper is attached to the upper surface of the leaf. The plant is placed in bright light for 12 hours. Four discs are then cut from the leaf in the positions shown on the diagram. The discs are tested for starch.

Which disc contains starch?

no6.png

 

A
B
C
D
7) Cholera bacteria in the gut cause secretion of chloride ions which leads to diarrhoea.

Which diagram shows the correct movement of chloride ions (Cl-) and water (H2O)?
no7.png
A
B
C
D
8) During the pupil reflex in bright light, what describes the actions of the muscles in the iris?
The circular muscles of the iris contract and the radial muscles relax.
The circular muscles of the iris contract and the radial muscles contract.
The circular muscles of the iris relax and the radial muscles contract.
The circular muscles of the iris relax and the radial muscles relax.
9) Which distribution of auxin will cause the shoot tip to grow towards the light?
no8.png
A
B
C
D
10) The diagram shows a bacterial cell containing a plasmid. 
no10.png
What is inserted into the plasmid if this cell is to be used for the production of insulin?
a length of DNA from a human
a length of DNA from another bacterium
a molecule of insulin
an enzyme
11) The photograph shows an organism.
 
no11.png
 
Which visible feature can be to classify this organism as a bird?
feathers
lays eggs
two legs
wings
12) When the temperature increases, the rate of an enzyme-catalysed reaction increases until the optimum temperature is reached. 

Which statement explains why the rate increases?

The enzyme and substrate have more kinetic energy and collide less frequently.
The enzyme and substrate have less kinetic energy and collide more frequently.
The enzyme and substrate have more kinetic energy and collide more frequently.
The enzyme and substrate have less kinetic energy and collide less frequently.
13) The diagrams show sections through three types of blood vessels. They art not drawn to the same scale. 
no12.png
In which order will red blood cells flow through these vessels in the human body when travelling from the aorta to the right atrium of the heart?
1 → 2 → 3
1 → 3 → 2
2 → 3 → 1
2 → 1 → 2

14) Where are the hormones oestrogen and progesterone produced during pregnancy?

amniotic sac
oviducts
placenta
umbilical cord
15) The diagram shows the sex chromosomes of a woman and of a man. Their genotypes for a recessive sex-linked condition are also shown. 
no14.png
What are the chances that their daughter will show the sex-linked condition?
0%
25%
50%
75%
16) Fig. 5.1 shows the stages involved in protein synthesis. 
no16.png
(a) Matching the parts labelled X, Y and Z with the name.
Z
mRNA
X
nucleus
Y
ribosome
17) A scientist monitored the changes in the pH in muscles before, during and after two minutes of vigorous exercise.

The changes in pH are caused by the production of lactic acid.

no17.png

Fig. 6.1

Complete the sentences to describe and explain the results in Fig. 6.1.

The pH decreases ……(A)…… during vigorous exercise.

The body respires aerobically. The ……(B)…… produced builds up in the muscles causing an oxygen debt.

It takes ……(C)…… minutes for the muscle pH to return to its initial level after exercise.

During this time the ……(D)…… rate remain high.

(A)
0.42
0.47
0.52
6.55
7.02
7.07
(B)
Ethanol
Methanol
Pyruvic acid
Lactic acid
Glucose
Oxygen
(C)
30
32
34
36
38
40
(D)
breathing rate and digesting rate
breathing rate and catalytic rate
breathing rate and heart rate
digesting rate and catalytic rate
digesting rate and heart rate
catalytic rate and heart rate
18) A student placed a plant in a very hot room for 12 hours. There was a bright light in the room and the plant was not given any water during the 12-hour period.

Fig. 1.2 shows a series of sketches that the student made of the stomata during the investigation.

no18.png
(a) Identify the cell labelled D on Fig. 1.2 and state the main function of the stomata.
Guard cell, Transpiration
Guard cell, Structural support
Spongy cell, Transpiration
Spongy cell, Structural support
Epidermal cell, Transpiration
Epidermal cell, Structural support
(b) State the advantage to the plant of the change to the stomata shown in Fig. 1.2.
Transporting nutrient
Releasing heat
Preventing wilting
Producing more food
Cellular respiration
Gas exchange
19) A student recorded the information about an aquatic habitat. 
 
Fig. 4.1 shows the student’s notes.
 
no19.png

(a) Complete Table 4.1 using the information in Fig. 4.1 by matching the names of the trophic level and one organism at each different trophic level to complete the longest food chain.

Tertiary consumer
Stoneflies
Quaternary consumer
Salmon
Primary consumer
Aquatic plants
Secondary consumer
Midges
Producer
Herons
(b) Humans also eat salmon.

Predict the impact on the feeding relationships shown in Fig. 4.1 of overharvesting of salmon.

More mayflies
More midges
Fewer stoneflies
Fewer shrimps
More herons
No change in aquatic plants

20) Fig. 4.1 shows a drawing of a nephron in the human kidney and associated blood vessels. no20.png

(a) Matching the structure labelled in Fig. 4.1 and its function to produce urine.

L
reabsorbs glucose and ions
N
filters waste from the blood
M
carries urine to the bladder
K
receives reabsorbed ions

21) The Rhesus (Rh) factor is a protein that is found on the surface of red blood cells in some people. If the protein is present then the individual is Rh positive.

The allele for the presence of the Rh factor is dominant and is represented by the letter D.

 

The recessive allele is represented by the letter d.

 

If a mother is Rh negative and the fetus is Rh positive there can be problems during pregnancy.

 

A Rh negative mother and a heterozygous Rh positive father have a child.

 

Complete the Punnett square and determine the probability of the child being Rh positive.              

 
probabilty
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