Chapter 19 - Viruses

Question 0

Why aren’t viruses considered alive?

Answer 0

Because they are composed of cells and needs to infect a living cell in order to reproduce.

Question 1

What is a virus?

Answer 1

No organelles of their own; not a real cell

Question 2

What does it mean when a virus has gone inactive?

Answer 2

Allowing the virus to go dormant

Question 3

What does a virus do to a cell?

Answer 3

Attaches itself to the cell and infects it by making copies from it

Question 4

Retrovirus =?

Answer 4

RNA that infects cells & does not have a capsid; can just make an organism sick or even kill it

Question 5

What is a prion?

Answer 5

A protein infectious particle that alters natural brain proteins making them resemble prions

Question 6

How do prions differ from viruses & cells?

Answer 6

Utilized in cell’s protein

Question 7

How do prions reproduce?

Answer 7

Cannot reproduce independently of the cell’s proteins

Question 8

Are prions alive?

Answer 8

No, they are essentially protein that can kill the brain or parts of it

Question 9

What is the difference between a cell, virus, virusoid, & prions?

Answer 9

Cell = can reproduce on its own, can utilize energy

Virus = can reproduce when inside of a cell & utilizes cell’s energy/resources to do so

Virusoid = like a virus but with no capsid

Prions = utilizes only in cell’s protein