Virus'

Question 1

What does acellular mean?

Answer 1

Not made out of cells.

Question 2

What does non-living mean?

Answer 2

Not alive, cannot carry out specific functions.

Question 3

What does a virus contain?

Answer 3

Attachment proteins, lipid envelope, protein capsid, genetic material, enzymes.

Question 4

What makes HIV different?

Answer 4

RNA instead of DNA, reverse transcriptase enzymes.

Question 5

Why is HIV dangerous?

Answer 5

Targets T-cells of immune system, fewer immune cells to fight infection, opportunistic infections and rare form of cancer form.

Question 6

Why dont antibiotics work on virus’?

Answer 6

Inhibit the formation of cross links in cell wall to break it down but a virus is acellular and does not have a cell wall.

Question 7

Describe the process of viral replication.

Answer 7

attachment proteins bind to complementary receptors, nucleic acid enters cell, DNA inserted into host cells genome (reverse transcriptase convert RNA->DNA first in HIV), DNA transcribed, virus enzymes and capsid made by ribosomes, assembled by golgi and RER, released

Question 8

What are attachment proteins for?

Answer 8

Bind to complementary receptors on host cell.