How can chemolithotrophs create a membrane pH gradient if they are not using traditional proton transporters such as complex I or III? a. They do not create pH gradients for use by the ATP synthase. b. Oxidation of extracellular substrates creates 'holes' in the membrane allowing protons to leak. c. Oxidation of extracellular substrates utilizes H2O as the oxygen source. This produces 2Ht. d. Instead of increasing proton concentration in the periplasmic space, these microorganisms neutralize protons in the cytoplasm.
How can chemolithotrophs create a membrane pH gradient if they are not using traditional proton transporters such as complex I or III? a. They do not create pH gradients for use by the ATP synthase. b. Oxidation of extracellular substrates creates 'holes' in the membrane allowing protons to leak. c. Oxidation of extracellular substrates utilizes H2O as the oxygen source. This produces 2Ht. d. Instead of increasing proton concentration in the periplasmic space, these microorganisms neutralize protons in the cytoplasm.
Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:Elaine N. Marieb, Katja N. Hoehn
Chapter1: The Human Body: An Orientation
Section: Chapter Questions
Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...
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Transcribed Image Text:How can chemolithotrophs create a membrane pH gradient if they are
not using traditional proton transporters such as complex I or IlI?
a. They do not create pH gradients for use by the ATP synthase.
b. Oxidation of extracellular substrates creates 'holes' in the membrane
allowing protons to leak.
c. Oxidation of extracellular substrates utilizes H2O as the oxygen
source. This produces 2H+.
d. Instead of increasing proton concentration in the periplasmic space,
these microorganisms neutralize protons in the cytoplasm.
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