Bacteriorhodopsin is a light-sensitive pigment found in ____ archaeans used to supply energy for ____ production.
A) halophilic; ATP
B) thermophilic; carbohydrate
C) methanogenic; methane
D) halophilic; carbohydrate
E) thermophilic; ATP

Question

Bacteriorhodopsin is a light-sensitive pigment found in ____ archaeans used to supply energy for ____ production.  
A) halophilic; ATP
B) thermophilic; carbohydrate
C) methanogenic; methane
D) halophilic; carbohydrate
E) thermophilic; ATP

Quizplus · Accepted Answer

Bacteriorhodopsin is found in halophilic (salt-loving) archaea and is used to generate a proton gradient which is then used for ATP production. This process is known as photophosphorylation. Therefore, option A is the correct answer. Option B is incorrect since thermophilic archaea do not use bacteriorhodopsin for carbohydrate synthesis. Option C is also incorrect since methanogenic archaea use different pathways for energy production. Option D is incorrect since halophilic archaea use bacteriorhodopsin to generate ATP and not carbohydrates. Option E is also incorrect since thermophilic archaea do not use bacteriorhodopsin for ATP synthesis.

Bacteriorhodopsin Is a Light-Sensitive Pigment Found in ____ Archaeans Used