Which of the following is a distinction between cellular respirat...

Question

Which of the following is a distinction between cellular respiration and fermentation?
a. the transfer of from intermediate substrates to ADP
b. the movement of H+ across a membrane down its concentration gradient
c. the splitting of glucose into two molecules of pyruvate
d. electrons moving through the electron transport chain

Accepted Answer

Welcome back. Here's our next question. It says anaerobic respiration differs from aerobic respiration in all ways. Except this wording is a little tricky for keeping straight as we look through our answer choices. Three of them will be ways. Truthful statements about ways in which anaerobic respiration differs from aerobic respiration. One of them this except means that one will not be a true statement about the way anaerobic respiration is different. So it's a little tricky to keep track of circled the accept. So we can kind of keep that in the forefront of our minds. Well, let's recall from our content videos that aerobic respiration users oxygen as the final electronic sector of the electron transport chain. Anaerobic respiration takes place and the absence of oxygen. You still have an electron transport chain taking place, generating A T. P. As it still pumps protons that can go through a tv kindness and generate a teepee. But without oxygen it has to use different molecules as the final electronic sector, example molecules include a few moderate nitrate, sulfate and sulfur. And a consequence of this is that all of these different molecules that it uses in the absence of oxygen have a smaller reduction potential in oxygen and therefore less energy is released per molecule. So with that in mind, let's start looking at our answer choices here choice A says it produces less a tp than aerobic respiration. This is a true statement about the way anaerobic respiration differs. So it cannot be our answer. It does produce less 80p than aerobic respiration. Aerobic respiration has the uh Krebs cycle that's generating tons of um that will generate 32 more molecules of a tp than anaerobic respiration. So It produces quite a bit less 80 p than the aerobic respiration. So that's not our answer. Choice. Choice B says it takes place in absence of oxygen. That is a true statement. Um Again, as we can tell by our name in the absence of oxygen, anaerobic respiration takes place while aerobic respiration needs oxygen. So that's a true statement about a difference and not our answer. Therefore, Choice C says it is a more primitive form of respiration. Well, this is also true. The early Earth's atmosphere had no oxygen. So you couldn't have aerobic respiration in those times, you had to use other electronic sectors and therefore anaerobic respiration is a more primitive form of respiration. So see cannot be your answer. And finally, we're onto choice D. Which says it results in a complete breakdown of glucose. Well, this is not a correct statement. It's a false statement. Aerobic respiration does involve the complete breakdown of glucose generating C. 0. 2 and that's because of that great oxidation potential of oxygen. Anaerobic, however, does not completely break down the glucose. It generates an alcohol Plus C. 02. So you still have a multiple carbon molecule in your alcohol here. So, those that is not a true statement about the difference between anaerobic a way in which anaerobic respiration differs from aerobic respiration. So, choice D. It results in a complete breakdown of glucose is our answer choice. Let's highlight that. Since it is not a correct statement about away anaerobic respiration differs from aerobic respiration. See you in the next video.

Key Concepts

Cellular Respiration

Fermentation

Electron Transport Chain

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