Viruses

Front

Which of these statements is true?

• A virus is unicellular, it has only one cell.
• A virus may sometimes be multicellular, have many cells.
• A virus has no cells.

Back

A virus has no cells.

Front

Which statement is true about viruses?
- A virus has a nucleus, but no other organelles.
- A virus has a nucleus and ribosomes.
- A virus has no organelles, because it has no cells, and it is non-living.

Back

A virus has no organelles, because it has no cells, and it is non-living.

Front

A virus is so small that 250,000 viruses could fit inside what? Options: a grain of sand, an apple, a basketball.

Back

a grain of sand

Front

Cell membranes of living organisms are made of a bilayer (2 layers) of

Back

lipids

Front

Which sentence is true?
1. All viruses, although they are not living, have a lipid layer that surrounds them.
2. Many viruses, although they are not living, have a lipid layer that surrounds them. This includes the corona viruses.

Back

Many viruses, although they are not living, have a lipid layer that surrounds them. This includes the corona viruses.

Front

The little sticks poking out of the sides of these viruses are called

Back

spike proteins

Front

Which sentence is true about this picture?

Back

It shows a virus entering the cell of a human or animal.

Front

Why do humans have receptor sites for viruses on our cells?

Back

Humans have receptor sites for viruses on our cells because those receptor sites were made for a different purpose, but viruses evolved to be able to use them.

Front

Why can the lipid layer of our cell and the lipid layer around a virus merge once the virus is attached to our cell?

Back

Lipids attract lipids

Front

Which sentence is true?

• Soap destroys viruses because it dissolves the DNA or RNA
• Soap destroys viruses because it bends the spike proteins
• Soap destroys viruses because it breaks up the lipid layer and allows it to be washed away.
• Soap destroys viruses because it is acidic.

Back

Soap destroys viruses because it breaks up the lipid layer and allows it to be washed away.