Communicable disease

Question 1

What is a vector?

Answer 1

carry pathogens from one organism to another, but do not have the disease themselves

Question 2

What type of cell is bacteria?

Answer 2

prokaryotes

Question 3

What is the average diameter of viruses?

Answer 3

0.02-0.3 nanometers

Question 4

What are viruses that attack bacteria are known as?

Answer 4

bacteriophages

Question 5

Protoctista affect what types of organisms?

Answer 5

plants and animals

Question 6

What are the four types of communicable disease?

Answer 6

virus
fungi
bacteria
protista

Question 7

What is ring rot and what is the effect on plants?

Answer 7

bacterial disease that affects the fields, and damages leaves

Question 8

What is TMV and what is the effect on plants?

Answer 8

tobacco mosaic virus, causes loss in cholorphyll, which stunts growth of plants

Question 9

What is tuberculosis?

Answer 9

a bacterial disease in mammals which destroys lung tissue and suppresses the immune system

Question 10

What is Bacterial Meningitis and how does it work?

Answer 10

a bacterial infection, of the brain which can spread to the rest of the body

Question 11

What is HIV and how does it work?

Answer 11

human immunodeficiency virus
targets T helper cells
- contains RNA as its genetic material
- Contains the enzyme reverse transcriptase
- which produces a single strand of DNA in the host cell

Question 12

What are the three types of direct transmission?

Answer 12

• direct contact
• inoculation (through the skin)
• ingestion

Question 13

What are the three different types of indirect transmission?

Answer 13

• fomites (inanimate objects)
• droplet infection (inhilation)
• vectors