Viral Structures and life cycles

Question 1

Viruses infect every type of cells including

Answer 1

Bacteria,
algae,
fungi,
protozoa,
plants,
animals

Question 2

Seawater can contain how many viruses per milliliter?

Answer 2

100 million viruses

Question 3

For many years, the cause of viral infections was unknown: Who was the person who postulated that a “living thing” smaller than bacteria causes viral infections and who also proposed the termed virus, which is Latin for “poison.”

Answer 3

Louis Pasteur

Question 4

What is Louis Pasteur known for?

Answer 4

Postulated that a “living thing” smaller than bacteria causes viral infections and who also proposed the termed virus, which is Latin for “poison.”

Question 5

The two people who showed that a disease in tobacco was caused by a virus.

Answer 5

Ivanovski and Beijerinck

Question 6

Loeffler and Frosch are famous for

Answer 6

Discovering an infectious particle smaller than bacteria (animal virus) causes foot-and-mouth disease in cattle

Question 7

What does the term virus name mean in Latin?

Answer 7

Poison

Question 8

What is a filterable virus?

Answer 8

Organisms smaller than bacteria that were passing special filters

Question 9

These early researchers found that when fluids from host organisms passed through porcelain filters designed to trap bacteria, the filtrate remained infectious.
This proved that a cell-free fluid could contain agents that could cause infection.

Answer 9

Filterable virus

Question 10

Are viruses organisms: Are they living or dead?

Answer 10

They are described as active(inside a host) or inactive rather than alive or dead.