Below is an image of the Krebs cycle: acetyl-CoA oxaloacetate COASH H20 NADH NAD* H20 malate citrate fumarate isocitrate FADH2 NAD* CO2 FAD АТР NADH 4 ADP succinate GTP NAD a-ketoglutarate H20 GDP NADH CO2 succinyl CoA - COASH COASH Consider the conversion of succinate to fumarate, which is coupled with the production the electron carrier FADH2. If this reaction was NOT coupled with the production of FADH2 (and only catalyzed the conversion of succinate to fumarate), how would this impact ATP production through cell respiration? ATP production would stop because no high energy electron carriers would be produced ATP production would still occur, but there would be a much lower ATP yield because a large number of electron carriers are no longer being made OATP production would stop because without FADH2 we will no longer have electrons moving through the electron transport chain ATP production would still occur, but there would be a slightly lower ATP yield because a small number of electron carriers are no longer being produced

In the presence of O₂ and low energy status of the cell, acetyl CoA is oxidized to oxygen lactate carbon dioxide ethanol O NADH

Match the following B vitamins with the roles of their coenzymes: riboflavin [ Choose ] niacin [ Choose ] pantothenic acid [ Choose ] vitamin B6 [ Choose ]

Which cytochrome P450-catalyzed reaction is shown below? R-CH2NH2 [R-CH=NH] Oxidation of aromatic amines Oxidative deamination Oxidative O-dealkylation Oxidative N-dealkylation para-hydroxylation R-CHO + NH3

Choose the correct identity:

In the beta oxidation of linoleic acid, converting the 3, 5, 8 trienoyl CoA intermediate back to an expected intermediate for a beta oxidation substrate costs the equivalent of how many ATPs? (hint: look at the 'right side' of the figure for addressing problem 3 with linoleic acid)

Below are some statements about the TCA Cycle. Which statement is true based on what we have learned in the class?   Question 16 options:   Oxaloacetate can be replenished from pyruvate carboxylation catalyzed by pyruvate carboxylase.   The catabolism of proteins can only feed into the TCA cycle at one point, which is Acetyl-CoA.   Acetyl-CoA has transporter proteins and can be transported directly from matrix to cytoplasm (for fatty acid synthesis).   In TCA cycle, both Acetyl-CoA and Succinyl-CoA hydrolysis reactions are coupled with ATP/GTP synthesis.

A liver cell undergoing gluconeogenesis is incubated in the presence of 14C labelled carbonic acid (H14CO3H). Soon after the incubation begins, the gluconeogenic products and intermediates from these cells are isolated. Where would you expect the radiolabelled carbon to be found? O C1 of lactate O C1 of glucose O Carbon dioxide O C3 of phosphoenol pyruvate O C1 of phosphoenolpyruvate

Which enzyme is used for both the synthesis and breakdown of acetoacetate? thiolase O HMG-CoA synthase OB-hydroxybutyrate dehydrogenase O B-Ketoacyl-CoA transferase

Refer to the diagram of the Krebs cycle Which substance could be considered as the most “heavily used” metabolic intermediate?* Succinyl CoA Acetoacetyl CoA Acetyl CoA Pyruvic Acid