3a - Prokaryotic Cells

What is it to be alive?

1) growth

What is it to be alive?

1) growth

2) capable of reproduction

What is it to be alive?

1) growth

2) capable of reproduction

3) responsiveness/irritability

What is it to be alive?

1) growth

2) capable of reproduction

3) responsiveness/irritability

4) perform metabolism

What is it to be alive?

1) growth

2) capable of reproduction

3) responsiveness/irritability

4) perform metabolism

5) made of cells

What is it to be alive?

1) growth

2) capable of reproduction

3) responsiveness/irritability

4) perform metabolism

5) made of cells

6) involved in evolution

Prokaryotes vs. Eukaryotes

size

organelles (including nucleus)

DNA

ribosomes

Sizes

Thiomargarita namibiensis

Very large bacteria

Common prokaryotic cell shapes

Fig. 11.1

Bacterial flagellum/a

Flagellar Arrangements

monotrichous

amphitrichous

lophotrichous

peritrichous

or swim & twiddle

Bacterial movement by flagella

axial filaments made of endoflagella

sheath stalk

prostheca

peptidoglycan

Wall

Cytoplasmic/ plasma/cell membrane

Why organisms make cells walls

Cytoplasmic/plasma/cell membrane

hopanoids

Nitrosomonas: folded membrane for respiration

Rhodospirillum: folded membrane for photosynthesis

Passive

aquaporin

tonicity

Active Transport

Group Translocation

cytoskeleton

Other prokaryotic internal structures (inclusions)

lipid

carboxysomes

sulfur

magnetite

“Bt” toxin

aka. gas vacuoles

Endospore: sporulation