Members of the Archaea differ from members of the Bacteria (or eubacteria) in that only the members of the Archaea have

a. different lipids in their membranes.
b. a nuclear membrane.
c. enzymes to carry out respiration in their plasma membranes.
d. a peptidoglycan cell wall.
e. a variety of morphologies, including cocci and vibrios.


A; Archaea have a very different biochemistry from that of bacteria, including the chemistry of the plasma membrane and cell wall. Choices c, d, and e are characteristic of at least some members of the true bacteria, and neither group has an organized nucleus (choice b).

Biology & Microbiology

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The actinomycetes are capable of degrading a wide variety of organic compounds.

Answer the following statement true (T) or false (F)

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Which of the following likely evolved from photosynthetic cyanobacteria?

a. Mitochondria b. Endosymbiotes c. Anaerobic prokaryotes d. Plastids

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Would the cholesterol molecule easily cross/associate with a phospholipid bilayer membrane? (Think about the ability of a steroid to dissolve in water.)

a. yes b. no

Biology & Microbiology

Dogs use panting to dissipate excess heat. What part of their brain detects the need for this response and sends the signal to pant?

A. Amygdala B. Hippocampus C. Prefrontal cortex D. Hypothalamus

Biology & Microbiology