LS microorganisms. (incomplete)

4 Classifications of micro organisms

Viruses

Bacteria

Fungi

Protists

What micro organism doesn’t have a kingdom

Viruses

Describe a virus

• Non-living

• Contain nucleus acid

• Different shapes and sizes

• Are parasitic (many are pathogens)

In which Kingdom is bacteria?

Monera

In which kingdom is fungi?

Fungi

Describe bacteria

• Occur in soil, air, water

• Single-celled

• No true nucleus

• Some are pathogens

Define Fungi

Saprophytic or parasitic Moulds and yeast

In what kingdom do protists belong?

Protoctista

Describe protists

• Unicellular or multi-cellular

• Mainly aquatic

  Some plant-like (photosynthesize)

• Some animal-like

• Some fungi-like

Difference between protist and protoctista

• Protist has been used to describe the single celled organisms of the kingdom.

• Protoctista has been used to include the multi-cellular organisms.

Types of nuclei acid

DNA (Deoxyribonucleic acid)

RNA (Ribonucleic acid)

Difference between DNA and RNA

What are the smallest micro organisms

Viruses

Define Capsid

Protein coat surrounding nuclei acid

Which 2 phases do viruses exist in?

Active: In contact with host cell, inserts genetic material into host cell taking over cell’s functions. DNA interferes with host cell’s metabolism to replicate.

Inactive: Outside host, has no metabolic activities.

Diagram of a bacteriophage

Describe Tobacco Mosaic Virus

• Affects agricultural crops by damaging leaves, flowers and fruit.

Stunts growth, distorts fruit and patches leaves.

• Reduces ability to photosynthesis, quality and quantity of crops

Describe rabies

• Caused by Rhabdovirus

• Contains RNA

• Transferred by bite, lick or scratch

• Unusual behaviour

• Vaccine

Effects of rabies

• Virus replication on site and in muscles enters nerve cells and travels to brain causing headeache