Microorganisms Worksheet Quiz

What are microorganisms also known as?

• Microbes

• Plants

• Animals

• Insects

Which group of microorganisms can only reproduce inside the cells of a host organism?

• Bacteria

• Fungi

• Viruses

• Algae

Why are some microorganisms called microbes?

• Because they are large and visible

• Because they can be seen with the naked eye

• Because they are so small that they cannot be seen without a microscope

• Because they are only found in water

Explain why viruses are considered different from other microorganisms. Use evidence from the text to support your answer.

• Viruses are larger than other microorganisms.

• Viruses can reproduce on their own outside a host.

• Viruses reproduce only inside the cells of a host organism.

• Viruses are visible to the naked eye.

Which organism shown is classified as algae?

• Bread mould

• Chlamydomonas

• Aspergillus

• Amoeba

Why are bacteria and yeast important in the preparation of certain Indian foods like idlis and dosa batter?

• They add color to the food

• They help in fermentation

• They make the food spicy

• They increase the shelf life

What is the process called when sugar is converted into alcohol by yeast?

• Photosynthesis

• Fermentation

• Respiration

• Digestion

Who discovered fermentation in 1857?

• Alexander Fleming

• Louis Pasteur

• Isaac Newton

• Albert Einstein

Why are antibiotics not effective against cold and flu?

• Because cold and flu are caused by bacteria.

• Because antibiotics are too strong for these diseases.

• Because cold and flu are caused by viruses.

• Because antibiotics are only for animals.

Who discovered the vaccine for smallpox and in which year?

• Louis Pasteur in 1885

• Alexander Fleming in 1928

• Edward Jenner in 1798

• Robert Koch in 1876