C12- Communicable disease

Question 1

Communicable disease

define

Answer 1

a disease that can be passed from one organism to another

Question 2

Pathogen

Define

Answer 2

A microorganism that causes disease

Question 3

Bacteria

General

Answer 3

prokaryotes

no membrane bound organelles

produce toxins

Question 4

Bacteria

Gram staining technique

Answer 4

due to two types of bacterial cell walls

gram positive- purple blue

gram negative- red

Question 5

Virus

general

Answer 5

Non living

invade living cells, use viral DNA to tell cell to reproduce virus, then burst cell

can lie dormant

not cells- no nucleus and cannot reproduce on its own

Question 6

Fungi

general

Answer 6

eukaryotic cells

digest food extracellularly

send threads (hyphae) into organisms

reproduce sexually or asexually

Question 7

General strategy of a pathogen

Answer 7

damage tissues of host organism directly

produce toxins which damage tissues

Question 8

Ways that pathogens damage tissue directly

Answer 8

Virsues take over cell metabolism and genetic material of a cell

break cells open as new generation of pathogen emerge

fungi digest and destroy living cells

Question 9

effect of pathogens produce toxins

Answer 9

fungi produce toxins that effect the host cell and cause disease

bacteria produce toxins that damage host cells

Question 10

Plant disease

TMV

Answer 10

virus that infects a range of over 150 plant types

damages leave sand flowers

stunts growth

resistant crop strains available

Question 11

Plant disease

potato blight

Answer 11

Fungus

hyphae penetrate host cells

resistant strains and careful management

Question 12

Plant disease

black sigatoka

Answer 12

banana fungus

attacks and destroys leaves

hyphae penetrate leaf cells and turn them black

use resistant strains and fungicides

Question 13

Plant disease

Ring rot

Answer 13

bacterial disease (gram positive)

damages leaves and tubers

field cannot be used for 2 years after infection