BIOL 111 Chapter 27 - Prokaryotes: Bacteria and Archaea

Yay or Nay: Bacteria and Archaea are part of the Domain Eukarya

All Prokaryotes

• Are Unicellular

• Have a plasma membrane and a cell wall

• Lack a nucleus and typical membrane-bound organelles

• All are true of Prokaryotes

Prokaryotes are flagellated for

Yay or Nay: Prokaryotes can have more than on flagella

What are the three primary shapes of Prokaryotes?

Prokaryotes can be divided into two Domains, what are they?

What substance is responsible for trapping the crystal violet solution when staining bacteria?

• Plasma Membrane

• Lipopolysaccharides

• Peptidoglycan

• Membrane-Bound Proteins

Gram-Positive Bacteria are classified by having a thick layer of this substance

Gram-Negative Bacteria do contain peptidoglycan layer, but their layer is very thin compared to Gram-Positive. So, what defining feature classifies Gram-Negative Bacteria?

Why do Gram-Negative Bacteria stain red?

• Because their peptidoglycan layer is too thin and the violet dye rinses away

• Because their peptidoglycan layer is too thick and the violet dye rinses away

• Because their peptidoglycan layer is too thin and the violet dye is trapped

• Because their peptidoglycan layer is too thick and the violet die is trapped