8Ca

1       Two different sorts of microbes are:

A       plants and fungi.

B       crustaceans and viruses.

C       viruses and bacteria.

D       viruses and pollen grains.

2       Which of these lists the organisms in the correct size order, smallest first?

A       viruses, bacteria, fungi, rose bushes, elephants

B       elephants, rose bushes, fungi, bacteria, viruses

C       bacteria, viruses, fungi, rose bushes, elephants

D       fungi, bacteria, viruses, rose bushes, elephants

3       Why do some people think that viruses are not living things?

A       They cannot carry out all seven of the life processes.

B       They can give people diseases.

C       They do not have lungs and so cannot breathe.

D       They are too small to see.

4       Look at the two pictures. What do they show?

A       X is a fungus and Y is a bacterium.

B       X is a pollen grain and Y is a virus.

C       X is a crustacean and Y is a plant.

D       X is a virus and Y is a bacterium.

8Cb

1       Which microbe is used to make bread rise?

A       bacteria                          B       yeast

C       plants                             D      sodium bicarbonate

2       What gas is needed for aerobic respiration?

A       carbon dioxide

B       water

C       oxygen

D       carbon monoxide

3       Which of these shows the correct word equation for fermentation?

A       oxygen + glucose ® carbon dioxide +

          water (+ energy)

B       carbon dioxide + water ® oxygen +

          glucose

C       glucose ® carbon dioxide + ethanol

          (+ energy)

D       xenon + krypton ® argon + neon +

          moron

4       The graph shows the growth of a population of yeast.

         At point ‘P’ the population stops getting bigger. One reason for this might be that:

A       the yeast cells can only grow to a certain size.

B       the food for the yeast has started to run out.

C       is has got dark and there is not enough light for them to grow.

D       the carbon dioxide for the yeast has started to run out.

8Cc

1       When a microbe gives you a disease you are said to be:

A       indebted to the microbe.

B       ingested by the microbe.

C       injected by the microbe.

D       infected by the microbe.

2       Colds, flu, chickenpox and AIDS are all caused by:

A       viruses.                           B       fungi.

C       polluted air.                    D      animals.

3       Dimitri has a cold. He may have caught this by:

A       standing in a cold place for too long.

B       not eating enough fruits and vegetables.

C       breathing in air containing a microbe.

D       staying up too late and getting very tired.

4       A theory is:

A       the results of an experiment.

B       the observations made during an experiment.

C       a scientific idea that can be tested.

D       a scientific idea that no one believes.

8Cd

1       Bacon goes off least quickly if it is kept in a:

A       fridge.                             B       fruit bowl.

C       bread box.                      D      freezer.

2       One part of your body that tries to keep microbes out is your:

A       hair.                                B       nails.           C         arm.     D         skin.

4       Antibodies are made by:

A       red blood cells.               B       white blood cells.

C       bacteria.                         D      platelets.

8Ce

1       An antibiotic is a medicine that:

A       kills bacteria and viruses.

B       kills only viruses.

C       kills only bacteria.

D       is dangerous and so is no longer used.

2       Vaccines make your body:

A       produce antibodies against a disease.

B       stop working to allow an operation to be done.

C       cool down when you get a temperature.

D       produce extra cells to mend broken bones.

3       If a person is immune to a disease, they:

A       keep on getting it over and over again.

B       can never get the disease.

C       need to be taken special care of because the disease might kill them.

D       can only get the disease two or three times during their lives.

4       A microbe that is not affected by an antibiotic is said to be:

A       susceptible to the antibiotic.

B       resistant to the antibiotic.

C       killed by the antibiotic.

D       denatured by the antibiotic.