The final electron acceptor of the electron transport chain that functions in
chemiosmotic phosphorylation during respiration is
a. oxygen
b. water
c. NAD+
d. Pyruvate
e. ADP
Which of the following is a major donor of energized electrons for the electron
transport chain of cellular respiration?
a. H2
O
b. ATP
c. NADH
d. ATP synthase
e. coenzyme A
Electron transport converts energy in NADH first to
a. a proton gradient in the mitochondria
b. FADH2
c. glucose, which then enters the mitochondria
d. heat, which is used to pump water into the cell
Thank you very much!
chemiosmotic phosphorylation during respiration is
a. oxygen
b. water
c. NAD+
d. Pyruvate
e. ADP
Which of the following is a major donor of energized electrons for the electron
transport chain of cellular respiration?
a. H2
O
b. ATP
c. NADH
d. ATP synthase
e. coenzyme A
Electron transport converts energy in NADH first to
a. a proton gradient in the mitochondria
b. FADH2
c. glucose, which then enters the mitochondria
d. heat, which is used to pump water into the cell
Thank you very much!
-
1.) A - Oxygen is always the final electron acceptor in aerobic organisms
2.) A - NADH is produced out in the cytoplasm during glycolysis & donates it's electrons to molecules that can pass the plasma membrane of the mitochondria which the H+ are picked back up by either NAD+ or FAD+ prior to the ETC & these ions moving down the ETC by an oxidation / reduction process through different cytochromes, ubiquiones, & coenzymes.
3.) I'd go with A - It's basically restating # 2 this is the process that actually creates ATP during aerobic respiration which more specifically is known as chemiosmosis which is due to a proton motive force as H+ ions go along the ETC they'll eventually pass an ATP-synthase molecule to produce ATP(kinda like how you can jump-start a battery by rolling a car downhill) & as O2 is picked up at the final ETC cytochrome oxidase it'll grab hold of those H+ ions and produce H2o as a byproduct & the cycle continues.
Hope this helps some!
2.) A - NADH is produced out in the cytoplasm during glycolysis & donates it's electrons to molecules that can pass the plasma membrane of the mitochondria which the H+ are picked back up by either NAD+ or FAD+ prior to the ETC & these ions moving down the ETC by an oxidation / reduction process through different cytochromes, ubiquiones, & coenzymes.
3.) I'd go with A - It's basically restating # 2 this is the process that actually creates ATP during aerobic respiration which more specifically is known as chemiosmosis which is due to a proton motive force as H+ ions go along the ETC they'll eventually pass an ATP-synthase molecule to produce ATP(kinda like how you can jump-start a battery by rolling a car downhill) & as O2 is picked up at the final ETC cytochrome oxidase it'll grab hold of those H+ ions and produce H2o as a byproduct & the cycle continues.
Hope this helps some!
-
The molecules in the ETC are reduced (gain electrons) as the electrons move down the chain. The reason each succesive reaction is spontaneous is b/c the reduction potentials (the ease of which the molecule is reduced) of the next molecule is higher. So the next molecule in the ETC will be more easily reduced than the one before it and so on all the way down the chain. It is simply the oxidation/reduction reactions that carry the electrons down the chain.
SO, to sum it up - b/c the successive molecules of the ETC have increasing reduction potentials.
SO, to sum it up - b/c the successive molecules of the ETC have increasing reduction potentials.