Microbial Infection

Question 1

5 main infectious agents

Answer 1

Virus (not cells/living)
Bacteria (prokaryotes)
Protozoa (single cellular eukaryotes)
Fungi (single cellular eukaryotes)
Helminths (multi cellular eukaryotes)

Question 2

Viruses divide by ….

Answer 2

Budding
Cytolytsis

Question 3

Viral genetic material

Answer 3

RNA or DNA

Question 4

HIV genetic material is

Answer 4

RNA - reverse transcriptase used - make DNA - make RNA - make protein

Question 5

What bacteria have membrane bound organelles but are still prokaryotic

Answer 5

Photosynthetic bacteria

Question 6

Are prokaryotes haploid or diploid

Answer 6

Haploid - single copy of chromosome

Question 7

How do prokaryotes divide

Answer 7

Binary fission

Question 8

Prokaryote cell walls contain

Answer 8

Peptidoglycan

Question 9

How is Shigella transmitted

Answer 9

Faecal-Oral

Question 10

Bacterial infection examples

Answer 10

Shigella
Tb
Meningitis
E. Coli

Question 11

Generation time of bacteria

Answer 11

Short
20mins - 2 days

Question 12

Human mutation rate

Answer 12

10^-8

Question 13

Viral mutation rate

Answer 13

10^-4

Question 14

Bacterial mutation rate

Answer 14

10^-8

Question 15

How do fungi replicate

Answer 15

Yeasts bud or divide
Filaments have cross walls or septa

Question 16

Protozoa replicate by

Answer 16

Binary fission
Formation of trophozoites

Question 17

Protozoa examples

Answer 17

Malaria (plasmodium species)
Leishmaniasis (Leishmania species)

Question 18

Brief outline of malaria life cycle

Answer 18

Infection aquired via mosquito vector
Blood and tissue parasites
Formation of trophozoites

Question 19

Leishmaniasis vector

Answer 19

Sandfly

Question 20

Helminth examples

Answer 20

Roundworms
Flatworms
Tapeworms

Question 21

Helminth size

Answer 21

Visible to the naked eye