Which of the following statements about NAD+ is false?

A). NAD+ is reduced to NADH during both glycolysis and Krebs cycle
B). NAD+ had more chemical energy then NADH
C). NAD+is reduced by the action of dehydrogenases
D). NAD+ can receive electrons for use in oxidative phosphorylation
E). In the absence of NAD+, glycolysis cannot function

I thought it was B, but other ppl were telling my it was D, so know i am really confused

D is true. See

http://science.nhmccd.edu/biol/etc/respirat.html

Oh, the confusion! Well, let's clear things up with a bit of humor, shall we?

First of all, let's eliminate any statement that could be true. So, choices A, C, and E sound like they could be possibilities. Now that we've narrowed it down, let's address the confusing duo: B and D.

Statement B says that NAD+ has more chemical energy than NADH. Well, NADH is basically NAD+ with an extra helping of electrons. And who doesn't love a good extra helping? So, yeah, NADH is packed with more chemical energy, making statement B false.

Now, onto statement D, which claims that NAD+ can receive electrons for use in oxidative phosphorylation. Well, guess what? It's true! NAD+ is a fantastic electron acceptor, ready to receive those precious electrons and contribute to oxidative phosphorylation.

So, with our comedy magnifying glass, we can see that the false statement is indeed B. NADH is the energetic buddy in this equation, not NAD+.

The false statement about NAD+ is B) NAD+ had more chemical energy than NADH. In reality, NADH carries more chemical energy than NAD+. NAD+ is the oxidized form, while NADH is the reduced form after receiving electrons. So, statement B is incorrect. The correct statement is that NAD+ is reduced to NADH during both glycolysis and the Krebs cycle (A). NAD+ is reduced by the action of dehydrogenases (C) and can receive electrons for use in oxidative phosphorylation (D). In the absence of NAD+, glycolysis cannot function (E).

To determine which statement about NAD+ is false, let's break down each statement and analyze them one by one:

A). NAD+ is reduced to NADH during both glycolysis and the Krebs cycle.
This statement is true. NAD+ acts as an electron carrier and is reduced to NADH during both glycolysis and the Krebs cycle.

B). NAD+ has more chemical energy than NADH.
This statement is false. NADH contains more chemical energy than NAD+. During cellular respiration, NADH is a product of the oxidation of glucose and contains high-energy electrons that are used to generate ATP.

C). NAD+ is reduced by the action of dehydrogenases.
This statement is true. NAD+ is reduced to NADH by enzymes called dehydrogenases, which transfer high-energy electrons from substrates to NAD+.

D). NAD+ can receive electrons for use in oxidative phosphorylation.
This statement is true. NADH, not NAD+, is involved in oxidative phosphorylation. NADH donates its high-energy electrons to the electron transport chain, which ultimately leads to ATP synthesis.

E). In the absence of NAD+, glycolysis cannot function.
This statement is true. NAD+ is a coenzyme that plays a crucial role in glycolysis. It accepts electrons during the oxidation of glucose and is required for the conversion of glyceraldehyde-3-phosphate to 1,3-bisphosphoglycerate. Without NAD+, this step cannot occur, and glycolysis is disrupted.

Based on the explanation above, the false statement is B). NAD+ has more chemical energy than NADH. The correct statement should be that NADH has more chemical energy than NAD+.