Viruses

All viruses are different, but what are two parts that a virus must have?

• Genetic Information (DNA or RNA)

• a lipid membrane

• a nucleus

• a protein coat

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

Which statement is true?

• 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.

A virus is so small that 250,000 viruses could fit inside

• a grain of sand

• an apple

• a basketball

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

• lipids

• proteins

• carbohydrates

Which sentence is true

• All viruses, although they are not living, have a lipid layer that surrounds them.

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

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

• sugar sticks

• spike proteins

• covid claws

Which sentence is true about this picture.

• It shows a virus being made.

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

• It shows a virus being destroyed by soap.

At the top left of this picture, you can see the spike protein of a virus fitting perfectly into a receptor site on our cells. Which sentence below is true?

• Humans have receptor sites for viruses on our cells because we want viruses to invade our cells.

• 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.

Tags

NGSS.HS-LS4-2

NGSS.HS-LS4-4

Once the virus is attached to our cell, the lipid layer of our cell and the lipid layer around the virus can merge because

• Lipids attract lipids

• Lipids attract proteins

• The DNA instructs them to do this.