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WorksheetsYear 8: Microbes
Total questions: 50
Worksheet time: 4hrs 10mins
Which of these are types of microbe?
Bacteria
Fungi
Mosquito
Virus
Microbes are called microbes because...
you can hear them
through a microscope.
they are very small.
they can only be seen
using a microscope.
Which microbe is the image most likely to be?
Bacteria
Fungus
Virus
None of the above
Look at the two pictures.
What do they show?
X is a fungus and Y is a bacterium
X is a pollen grain and Y is a virus
X is a crustacean and Y is a plant
X is a virus and Y is a bacterium
Which best compares a virus to a bacterium?
A virus is a large, living particle, and a bacterium is a large, living cell.
A virus is a tiny, nonliving particle, and a bacterium is a large, living cell.
Microorganisms that cause diseases are called __________ .
parasite
pathogens
host
preservatives
Which microbe would be considered the smallest and can cause a cold or the flu?
Tick
Bacterium
Virus
Germ
Which type of microbe lives and grows like plants and can cause athlete’s foot?
Protozoa
Virus
Fungi
Bacteria
Which of the following is
true for bacteria?
It has a cell wall.
It is destroyed by antibiotics
It has a protein coat.
It produces toxins.
Which pathogen invades healthy cells
and use organelles to make
copies of itself?
Virus
Bacteria
Fungi
Parasite
Why do some people think that viruses
are not living things?
They cannot carry out all seven
of the life processes.
They can give people diseases.
They do not have lungs and so cannot breathe.
They are too small to see.
When a microbe gives you a disease you are said to be:
injected with a microbe
indebted with a microbe
infected with a microbe
ingested with a microbe
What does the word
“transmitted” mean?
spoken
thrown
spread
read
Bacteria and viruses can reproduce quickly inside the body and make people feel ill. Bacteria and viruses make us feel ill because they produce _______________ .
antitoxins
toxins
antibodies
Which of these are ways in
which microbes can be spread?
Water and Food
Air
Direct Contact
Body Fluids
Animals/Insects
In which way does cold spread?
Drinking contaminated water
Animals that draw blood
Droplets in the air when people cough or sneeze
Eating food that is contaminated
Breathing air polluted with carbon dioxide
Colds, flu, chickenpox and AIDS are all caused by
virus
fungi
polluted air
animals
What are TWO examples of
how microbes can help us.
Make bread dough rise
and make yogurt
Cramp your stomach
and give you gas
Make your hair shiny
and clear up acne
None of these
Which of these shows the correct word
equation for fermentation?
oxygen + glucose → carbon dioxide + water
carbon dioxide + water → oxygen + glucose
glucose → carbon dioxide + ethanol
xenon + krypton → argon + neon + moron
Which of the products in fermentation
is used to make beer?
Glucose
Oxygen
Carbon dioxide
Ethanol
Which of the products in fermentation
is used to make bread rise?
Glucose
Oxygen
Carbon dioxide
Ethanol
Which microbe is used
to make bread rise?
Bacteria
Yeast
Plants
Sodium Bicarbonate
Virus
Look at the diagram.
The organ shown in the diagram
can kill microbes because:
it is very hot.
it squashes them
there is no air in it
it contains hydrochloric acid
Which hair-like structures in the airways
prevent the entrance of pathogens to the lungs?
Cilia
Mitochondria
Flagella
Plasmids
The spread of disease can be prevented by
simple hygiene measure
destroying vectors
isolation of infected individuals
vaccination
Which of the following is the
body's defense against infectious organisms and other invaders?
Respiratory system
Endocrine system
Immune system
Circulatory system
White blood cells help to defend the body against pathogens.
How do the white blood cells do this?
(Select THREE answers)
Clone pathogens
Engulf pathogens
Produce antibiotics
Produce antibodies
Produce antitoxins
A substance that is capable of triggering
an immune system response.
Antibodies
Antigens
Phagocytes
Lymphocytes
What is an antigen?
A chemical produced by
the white blood cells
A chemical on the
surface of the pathogen
A microbe that causes a disease
What is in a vaccine?
small amounts of dead pathogens
large amounts of live pathogens
large amounts of dead pathogens
Vaccines make your body:
produce antibodies against a disease.
stop working to allow an operation to be done.
cool down when you get a temperature.
produce extra cells to mend broken bones
Antibodies are made by
red blood cells
white blood cells
bacteria
platelets
The vaccine stimulates the white blood cells to produce ___________________ which destroy the virus.
antibiotics
antibodies
drugs
What is true of white blood cells in a second exposure to infection?
They are produced more rapidly
and in greater numbers
They are produced more slowly
but in greater numbers
They are produced more rapidly
but in lower numbers
Polio is a disease caused by a virus.
In the UK, children are given polio vaccine to protect them against the disease.
The vaccine contains an ______________
form of the polio virus.
active
infective
inactive
If more people were vaccinated the number of children getting chickenpox would decrease.
What are TWO possible reasons for this decrease?
Drugs to treat chickenpox are no longer effective
Children are less likely to come into contact with someone with the disease
More people will have the correct antibodies
People may catch the disease from the vaccination
People may have a weakened immune system
An antibiotic is a medicine that:
kills bacteria and viruses
kills only bacteria
kills only viruses
is dangerous and is no longer used
What is the name of the gelatinous substance
on which microbes can be grown in the laboratory?
Gum
Nutrients
Plastic jelly
Agar
True or False.
Antibiotics can kill viruses.
True
False
Why it is difficult to develop
drugs that kill viruses?
because drugs that kill viruses
also damage the body’s tissues.
because viruses mutate quickly
because viruses are small
because viruses cannot
reproduce by themselves
Overuse of antibiotics might speed up the development of _________________ strains of ____________________ .
resistant; bacteria
resistant; antibody
immune; antibody
immune; viruses
New strains of pathogens have developed
which are resistant to antibiotics.
New strains are produced when pathogens _______________ .
are short of food
mutate
invade body cells
Which is the most likely reason for a decline in antibiotic use?
Antibiotics have severe
health side effects.
Companies find antibiotics
too expensive to produce.
Most health insurance does not cover
treatment with antibiotics.
Bacterial infections have become
resistant to present antibiotic treatment.
Why is it bad to stop taking your antibiotic before the doctor recommends?
not all of the bacteria is killed, possibly leading to resistance
you will weaken your immune system
you'll get MRSA
you'll gain weight
What is a painkiller?
A drug that kills bacteria
A drug that causes hallucinations
a drug or a medicine for relieving pain.
A drug only prescribed for adults
Which pathogen can be prevented by the use of vaccines?
Virus
Bacteria
Fungi
Parasite
A microbe that is not affected by an antibiotic is said to be:
susceptible to the antibiotic
resistant to the antibiotic
killed by the antibiotic
denatured by the antibiotic
