A Fish That Has Been Salt-Cured Subsequently Develops a Reddish

question 42

Multiple Choice

A fish that has been salt-cured subsequently develops a reddish color. You suspect that the fish has been contaminated by the extreme halophile Halobacterium. Which of these features of cells removed from the surface of the fish, if confirmed, would support your suspicion?
1) the presence of the same photosynthetic pigments found in cyanobacteria
2) cell walls that lack peptidoglycan
3) cells that are isotonic to conditions on the surface of the fish
4) cells unable to survive salt concentrations lower than 9%
5) the presence of very large numbers of ion pumps in the plasma membrane

• A) 2 and 5
• B) 3 and 4
• C) 1, 4, and 5
• D) 3, 4, and 5
• E) 2, 3, 4, and 5

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Definitions:

International Cartel

A consortium of independent organizations formed to limit competition and control prices in international markets.

OPEC

The Organization of Petroleum Exporting Countries, a consortium of countries that coordinates and unifies the petroleum policies of its member countries to secure fair and stable prices for petroleum producers.

OPEC

The Organization of the Petroleum Exporting Countries is an intergovernmental organization of 13 oil-producing countries that coordinates and unifies petroleum policies among member countries.

Free-Trade Zone

A designated geographic area where goods may be landed, handled, manufactured, or reconfigured and re-exported without the intervention of customs authorities.