Microorganisms Quiz

What is the approximate actual size of an Amoeba in micrometers?

• 500 micrometers

• 300 micrometers

• 200 micrometers

• 100 micrometers

Answer explanation

An amoeba typically measures around 300 micrometers in size. This makes the correct answer 300 micrometers, as it falls within the common size range for these single-celled organisms.

Which group does Paramecia belong to?

• Fungi

• Bacteria

• Protists

• Viruses

Answer explanation

Paramecia are single-celled organisms that belong to the group Protists. They are not fungi, bacteria, or viruses, making Protists the correct classification for these eukaryotic microorganisms.

Which organism is used to make bread rise?

• Amoeba

• Baker's yeast

• Lactobacillus

• Staphylococcus

Answer explanation

Baker's yeast, a type of fungus, ferments sugars in the dough, producing carbon dioxide gas that causes the bread to rise. Other options like amoeba and Staphylococcus do not have this leavening effect.

What is the approximate actual size of Escherichia coli in millimeters?

• 0.5 mm

• 0.3 mm

• 0.002 mm

• 0.01 mm

Answer explanation

Escherichia coli, commonly known as E. coli, is approximately 0.002 mm in size. This makes it a very small bacterium, significantly smaller than the other options listed.

Which virus causes smallpox?

• T4 bacteriophage

• Rabies virus

• Smallpox virus

• Influenza virus

Answer explanation

The virus that causes smallpox is specifically known as the smallpox virus, also called Variola virus. The other options listed do not cause smallpox.

Which group of bacteria is capable of photosynthesis?

• Escherichia coli

• Lactobacillus

• Cyanobacteria

• Staphylococcus

Answer explanation

Cyanobacteria are the only group among the options that can perform photosynthesis, using sunlight to convert carbon dioxide and water into glucose and oxygen, unlike the other bacteria listed.

Tags

NGSS.MS-LS1-6

What is the approximate actual size of the Influenza virus in micrometers?

• 0.1 micrometers

• 0.15 micrometers

• 0.2 micrometers

• 0.3 micrometers

Answer explanation

The Influenza virus is approximately 0.1 micrometers in size, making it one of the smaller viruses. This size allows it to easily infect host cells, which is crucial for its replication and spread.

Which virus is also known as the "flu"?

• Rabies virus

• Influenza virus

• Polio virus

• Rhinovirus

Answer explanation

The virus commonly referred to as the "flu" is the Influenza virus. It is responsible for seasonal flu epidemics, unlike the other viruses listed, which cause different diseases.

What is the approximate actual size of Diatoms in millimeters?

• 0.5 mm

• 0.3 mm

• 0.25 mm

• 0.2 mm

Answer explanation

Diatoms are typically around 0.2 mm in size, making this the correct choice. They are microscopic algae, and their size can vary, but 0.2 mm is a common approximation for many species.

Which organism is slipper-shaped and moves with cilia?

• Amoeba

• Paramecia

• Euglena

• Diatoms

Answer explanation

Paramecia are slipper-shaped organisms that move using cilia, which are tiny hair-like structures. In contrast, Amoeba moves using pseudopodia, Euglena has a flagellum, and Diatoms are primarily known for their silica cell walls.