List the characteristics of the following groups and identify examples for each: Archaea, Bacteria, and
Eukarya. What will be an ideal response?
Many of these characteristics are compared in Table 25-2 on textbook p. 526. The following are the
main points. In contrast to Bacteria, Archaea do not have peptidoglycan in their cell walls. The plasma
membrane of both Bacteria and Eukarya have straight chain fatty acids linked to glycerol molecules by
ester linkages. Archaea are more like Eukarya because they do not have simple RNA polymerase .
Like Eukarya, Archaea translation begins with methionine. Both Archaea and Bacteria lack the
membrane organelles of Eukarya.
Archaea example is Methanospirillum hungata.
Bacteria example is Escheriachia coli.
Eukarya example is Plasmodium falciparum
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Which statement regarding exotoxins and endotoxins is true?
A. Endotoxins and exotoxins are highly immunogenic, allowing for the development of protective antibodies and vaccines. B. Endotoxin has targeted activity, whereas exotoxins have systemic effects when released. C. Endotoxin is released from the cell wall of dead bacteria, whereas exotoxin is released from live bacteria. D. Endotoxins and exotoxins bind to specific receptors on a bacterial cell, leading to the pathological events associated with the toxins.
Organelles are:
A) organisms. B) like tiny organs within cells. C) a group of cells that serve a common function. D) cells. E) proteins.
Most of the oxygen in human blood is:
A) carried in the plasma membrane of red blood cells. B) dissolved in the plasma. C) carried in hemoglobin. D) carried on albumin.
A gametophyte is _________.
a. haploid and makes gametes b. diploid and makes gametes c. haploid and makes spores d. diploid and makes spores