Biology U4 (variety of living organisms)

Example of eukaryotic cells

Example of eukaryotic cells

Animal, plant, fungi and protoctists

Examples of prokaryotic cell

Bacteria

Eukaryotic cell structure

• nucleus

• Mitochondria

• Chloroplasts (in plants)

• Cytoplasm

• Cell membrane

• Ribosomes

• DNA (in nucleus)

Prokaryotic cell structure

• cytoplasm

• Cell membrane

• Ribosomes

• DNA (in cytoplasm)

What is 4 + 1 kingdoms of life

• animals, plants, fungi, protoctists

• + bacteria

How many nucleus does fungi have?

Fungi are multinucleated, meaning that they have more than one nucleus in each cell

Fungi feed by…

Saprotrophic nutrition, meaning that they secrete enzymes onto food and absorb digested molecules

What is hyphae?

Is organisation of multicellular fungi

Is protoctists multi or uni cellular?

Uni

Does bacteria has mitochondria?

No

What is cell wall made from in plants?

Cellulose

What is cell wall made from in fungi?

Chitin

Examples of protoctists?

• amoeba

• Chlorella

• Plasmodium

What can plasmodium do?

Cause malaria

What can chlorella do?

Can photosynthesis

Examples of bacteria?

• lactobacillus

• Pneumococcus

What is lactobacillus do?

Makes yogurt

What is pneumococcus do?

Cause pneumonia

What is a pathogen?

A pathogen is a microorganism that can cause a disease

Examples of pathogens (bacteria)

• tuberculosis (caused by M. tuberculosis)

• Food poisoning (caused by E. coli)

Examples of pathogens (Fungi)

Athlete’s foot

Examples of pathogens (Protoctists)

• malaria (caused by plasmodium)

Examples of pathogens (Virus)

• AIDS( caused by HIV)

• Flu ( caused by influenza)

Bacteria cell structure (7)

• tail

• Cytoplasm

• Cell wall

• Cell membrane

• Circular DNA

• Ribosomes

• Plasmoid

Virus cell structure (4)

• envelope (some viruses)

• Genetic material (DNA)

• Protein coat

• Receptors

Are viruses living organisms?

No

What viruses made of?

• DNA

• Protein

Are viruses bigger than bacteria?

Smaller

What viruses need for multiply cells?

Host cells