Download Pathogens and spread of disease - Questions Q1. Cholera is a

Pathogens and spread of disease - Questions
Q1. Cholera is a disease caused by a pathogen.
(i) State the type of pathogen that causes cholera.
(1)
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(ii) Complete the sentence by putting a cross (
The cholera pathogen is spread
) in the box next to your answer.
(1)
A
B
C
D
in air
by houseflies
by mosquitoes
in water
Q2.
The female mosquito can carry the Plasmodium protoctist.
This protoctist causes malaria in humans.
When the female mosquito breaks the skin of a person the Plasmodium is transferred into the blood of that
person.
(i) State the name of this type of disease transmission.
(1)
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(ii) The survival of the Plasmodium is dependent on living in the blood of another species.
This relationship is an example of
(1)
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(iii) Plasmodium causes an infectious disease.
What is the name given to any disease causing organism?
Put a cross ( ) in the box next to your answer.
(1)
A
B
C
D
bacterium
lysozyme
pathogen
virus
Q3.
The housefly can also carry disease causing organisms.
Describe how the housefly spreads disease.
(2)
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Q4.
* Describe how different pathogens are spread within human populations.
(6)
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Q5.
Pathogens are microorganisms that cause disease.
Draw one straight line from each disease to the type of pathogen that causes the disease.
(2)
Pathogens and spread of disease – Questions
Mark Scheme
Q1.
Answer
(i)
(ii)
Acceptable
answers
Mark
(1)
(1)
bacteria
D in water
Q2.
Question
Number
(i)
Answer
Acceptable answers
Mark
(animal) vector
Question
Number
(ii)
Question
Number
(iii)
Answer
vector borne vector
transmission
Acceptable answers
(1)
Mark
parasitism / parasitic
Answer
parasite(s)
Acceptable answers
(1)
Mark
Question
Number
Answer
Acceptable answers
A description
including two of the
following points
• housefly picks up
organisms from
contaminated source
/ dysentery
organisms / disease
(1) • the housefly
lands on food /
vomits on the food /
contaminates
surface /skin(1)
• which people then
eat /touch (1)
fly lands on faeces
eq defaecate eq on
food / surface
(1)
C
Q3.
Mark
(2)
Q4.
Question
Number
QWC
Indicative Content
*
Level
1
0
1-2
2
3-4
3
5-6
Mark
A description of how pathogens are
spread and how they enter the human
body in a logical order • cholera bacteria
ingested through the drinking of ‘dirty’
water • Salmonella bacteria ingested
through contaminated food products /
spread by direct contact • influenza virus
spread through droplet
inhalation/airborne process • athlete’s
foot fungus spread by contact with fungal
spores • HIV spread by exchange of
contaminated body fluids • dysentery
infection / bacteria spread through
housefly vector • malaria protozoa
(6)
spread by the Anopheles mosquito
No rewardable content
• few examples of pathogens are given and/or wrongly linked to
their sources of infection or method of transmission • the
answer communicates ideas using simple language and uses
limited scientific terminology • spelling, punctuation and
grammar are used with limited accuracy
• there are several examples of pathogens mentioned linked to
their source of infection • there is a link to the method of
transmission for each of the pathogen • the answer
communicates ideas showing some evidence of clarity and
organisation and uses scientific terminology appropriately
• spelling, punctuation and grammar are used with some
accuracy
• the majority of the pathogens are mentioned and linked to their
source of infection • the method of transmission is described
accurately for each of the pathogens • the answer
communicates ideas clearly and coherently uses a range of
scientific terminology accurately • spelling, punctuation and
grammar are used with few errors
Q5.
Question
Number
Answer
Mark
both lines needed for 2
marks
(2)