A fish that had 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) its cells contain bacteriorhodopsin
5) the presence of very large numbers of ion pumps in its 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

Question

Quizplus · Accepted Answer

Halobacterium is an extreme halophile that thrives in high-salt environments. It lacks peptidoglycan in its cell walls, is isotonic to salty conditions, contains bacteriorhodopsin for energy, and has numerous ion pumps to manage osmotic pressure.

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