Which carbon atom(s) of pyruvate is(are) first converted to carbon dioxide by pyruvate dehydrogenase complex?
(a) the carboxylate carbon
(b) the carbonyl carbon
(c) the methyl carbon
(d) both carbons (a) and (c) in equal amounts

(A) The carboxylate carbon

Explanation:

Pyruvate is produced as a product of glycolysis in cytoplasm.

Pyruvate oxidation takes place in mitochondrial matrix. Here, these steps are followed:

Step 1. The carboxyl group of the pyruvate is snipped off and is released as a carbon dioxide.

Step 2. The molecule containing 2 carbons produced from the step 1 is oxidized, and the electrons lost in the oxidation are picked up by

Step 3. The oxidized two-carbon molecule gets attached to Coenzyme A and forms acetyl CoA.

output?

explanation:

1.consider the following balanced equation and answer parts a through. show calculations for each part.  

3 ag(s) + 4 hno3(aq) → 3 agno3(aq) + no(g) + 2 h2o(l)  

a. calculate the number of moles of agno3 produced by the reaction of 3 moles of ag with excess hno3. if the number to the left of the compound represents the number of moles of the compound which are present, then 3 moles of ag react with 4 moles hno3 to produce 3 moles agno3 (aq).

so the answer to a would be 3 moles.

b. calculate the number of moles of agno3 produced by the reaction of 108 grams of ag with excess hno3.  

i'm not sure how to plug in the grams of silver into an equation using moles to find how many moles are produced.

c. calculate the number of grams of agno3 produced by the reaction of 108 grams of ag with excess hno3  

d. calculate the number of moles of no produced as a byproduct of the reaction of 108 grams of ag with excess hno3.  

e. calculate the number of grams of no produced as a byproduct starting with 108 grams of ag and excess hno3.  

explanation: