Archaea and Bacteria

Traditional classification schemes separated organisms into two main groups

• pathogenic bacteria and probiotic bacteria

• prokaryotes and eukaryotes

• halophiles and methanogens

Both Bacteria and Archaea are prokaryotes, single-celled microorganisms with no nuclei.

• True

• False

Eukaryote does not include

• Humans

• Plants

• Animals

• Archaea

• Archaea cell membranes consists of a ______ bipolar layer of phospholipids bonded to glycerol by ether bonds (stronger and not subject to hydrolysis).

• Stronger cell membrane allows them to ​ ​ (a)   in a ​ (b)   range of habitats with ​ (c)   conditions

• survive
• large
• extreme

Halophiles are archaea that live in which conditions:

• Extremely hot

• Extremely cold

• Extremely salty

• Extreme methane levels

• Archaea are pathogenic

• • True

• False

Bacteria have the following structures: (choose 2)

• Mitochondria

• Cell membrane

• Nucleus

• Ribosomes

• Gram positive bacteria

  • (choose 2)

• • Lack lipids

• Contain lipids

• Appear red

• • Appear purple

Name the specialized surface chemicals that allow individual cells to fasten themselves to other cell

• Cilia

• Pilli

• Flagella

• Villius