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

question 75

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 containing 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

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Definitions:

Epididymis

A tube that connects a testicle to the vas deferens in the male reproductive system, where sperm is stored and matures.

Ejaculatory Duct

A tube through which semen enters the urethra in males, formed by the fusion of the vas deferens and the seminal vesicle duct.

Ductus Deferens

A muscular tube that transports sperm from the epididymis to the ejaculatory ducts in preparation for ejaculation.

Rete Testis

A system of channels within the testes that serves to semi-mature sperm and convey it to the epididymis.