By the reaction catalyzed by the pyruvate dehydrogenase complex:a) NAD+ is oxidized to become NADH that is used later in the ETC to generateATPsOb) NAD+ is reduced to become NADH that is used later in the ETC to generateATPsc) FAD is oxidized to become FADH2 that is used later in the ETC to generateATPsOd) FAD is reduced to become FADH2 that is used later in the ETC to generateATPse) A and Cf) B and D

The glycolytic process results in pyruvate, which is a substantial source of acetyl-CoA for the TCA…

Answered: By the reaction catalyzed by the…

Biochemistry

9th Edition

ISBN:9781319114671

Author:Lubert Stryer, Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr.

Publisher:Lubert Stryer, Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr.

Chapter1: Biochemistry: An Evolving Science

Section: Chapter Questions

Problem 1P

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When proteins are digested for fuel, they are first broken down into their amino acid components. Amino acids can be further oxidized to generate useful energy for the cell. For example, when one molecule of the amino acid tryptophan is oxidized, one pyruvate molecule and one acetyl CoA molecule are generated. One NADH molecule is also generated during the oxidation of tryptophan into one pyruvate molecule and one acetyl CoA molecule. Below is the general reaction described in the prompt: 1 tryptophan --> 1 pyruvate + 1 acetyl CoA + 1 NADH
How come high levels of NADH indicate reduced coenzymes rather than oxidized coenzymes? Isn't pyruvate oxidized by the reduction of NAD+ to NADH? Why is the answer reduced then?
From the complete oxidation of glucose (glucose → 6CO2), how many total NADH electron carriers are produced?
You know that during oxidative phosphorylation, 1 NADH creates 2.5 ATP and 1 FADH2 creates 1.5 ATP. From this information, how many total ATP molecules will be produced from the complete oxidation of pyruvate?
The glycolytic enzymes hexokinase and glucokinase (in human liver cells) catalyze the conversion of: 1,3-bisphosphoglycerate into 3-phosphoglycerate (producing ATP) glyceraldehyde-3-phosphate into 1,3-bisphosphoglycerate (producing NADH) phosphoenolpyruvate into pyruvate (producing ATP) fructose-6-phosphate into fructose-1,6-bisphosphate (consuming ATP) glucose into glucose-6-phosphate (consuming ATP) Which of the following glycolytic enzymes must consume ATP during phosphorylation of its preferred substrate molecule? phosphoglycerate mutase succinate dehydrogenase phosphoglycerate kinase phosphofructokinase pyruvate kinase
Which of the following is higher during high levels of glutathione reductase and NADP? SH A но (GSH) OH NH2 NH2 HO OH ;-CH-CH2-CH2-C-NH-CH–ċ–NH–CH2- CH2 В (GSSG) CH2 -CH-CH;-CH2=C-NH–C NH-CH–Ç-NH-CH2-C HO OH NH2
What is the first cofactor to accept electrons from pyruvate in the Pyruvate dehydrogenase complex? Thymine pyroposphate lipoyllysine FAD NAD⁺
The co-enzyme that helps in the removal of carbon dioxide from pyruvate during the PDH mechanism is Pyruvate oxidative decarboxylase CoA NAD+ Thiamine Pyrophosphate
Figure 17.9 shows the steps in the pyruvate dehydrogenase complex reaction cycle. A key product, acetyl CoA, is released after the fourth step. What is the purpose of the remaining steps?
Which of the following stimulates the conversion of pyruvate to acetyl-CoA? a) Activation of pyruvate dehydrogenase kinase b) A decrease in the ratio of NAD+/NADH c) Bothaandb d) Neither a nor b
What is the primary role of the Kreb's cycle? To destabilize and split apart glucose molecules to make ATP To convert pyruvate to acetyl-CoA, producing CO2 and a high energy electron carrier To use the energy stored in acetyl-CoA to make ATP and high energy electron carriers To fix carbon dioxide to produce G3P, which is used to make glucose
How many molecules of NADH are produced when one glyceraldehyde- 3-phosphate is metabolized through glycolysis and Krebs cycle?

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