Multiple Choice
Molecular oxygen (O2) , which is required for the production of ATP by mitochondria, must pass through at least three membranes to get to the enzymes where it is used. O2 is also produced in chloroplasts and must pass through at least four membranes to be released from the plant. How does O2 move across biological membranes?
A) There are numerous protein transporters that allow O2 to travel across membranes.
B) O2 is nonpolar and very small, so it can move by simple diffusion across the membrane.
C) O2 undergoes a chemical reaction that binds it to other substances that are transported across the membranes.
D) O2 is hydrophilic and travels with water across the membranes.
Correct Answer:
Verified
Correct Answer:
Verified
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