Two prokaryotes are shown in the figure that have additional cellular membranes within the plasma membrane.What functions could the respiratory membranes and the thylakoid membranes provide? A)These are both autotrophic evolutionary adaptations to allow organic molecule production. B)The respiratory membrane allows a functional electron transport chain and oxidative phosphorylation of ATP. C)The thylakoid membrane allows the fixation of CO₂during the Calvin Cycle. D)The respiratory membrane provides a location to conduct the citric acid cycle.

Question

Quizplus · Accepted Answer

The respiratory membrane, also known as the inner mitochondrial membrane, contains the electron transport chain and ATP synthase, allowing for oxidative phosphorylation to occur and therefore energy production. The thylakoid membrane, found in photosynthetic prokaryotes, contains chlorophyll and other pigments necessary for photosynthesis, and allows for the formation of a proton gradient which drives ATP synthesis through chemiosmosis. Option A is incorrect as autotrophic adaptations refer to the ability to produce organic molecules from inorganic sources, not a specific membrane function. Option C refers to the fixation of carbon dioxide, which occurs in the stroma of the chloroplast, not the thylakoid membrane. Option D is incorrect as the citric acid cycle occurs in the mitochondrial matrix, not the respiratory membrane.

Two Prokaryotes Are Shown in the Figure That Have Additional