Unit 1-Lesson 10

Question 1

What can’t viruses do?

Answer 1

• Viruses cannot
  
  • grow
  • reproduce on their own
  • produce or use energy
  • create waste

Question 2

Is a virus a parasite?

Answer 2

Yes

Question 2

What is a virus?

Answer 2

Virus: infectious agent made up of DNA or RNA wrapped in a protein coat called a capsid

Question 3

What is a parasite?

Answer 3

Parasite: organism that depends on a host; cause organism harm

Question 4

What do viruses not have?

Answer 4

• Viruses do not have
  
  • a typical cellular structure
  • nucleus cytoplasm
  • Organelles
  • Cell membranes

Question 5

Describe the structure of a virus

Answer 5

• Viruses do not have
  
  • a typical cellular structure
  • nucleus cytoplasm
  • Organelles
  • Cell membranes

Question 6

How do Viruses attach to a cell?

Answer 6

• To replicate, a virus must enter a host cell
• To attach, virus interlocks its proteins with receptor site on host cell
• Like two pieces of a jigsaw fitting together
• Viruses are HOST SPECIFIC - can only infect certain type of organisms