CM-UY 1004 Lecture Notes - Lecture 9: Glycogen, Citric Acid Cycle, Membrane Transport Protein

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2 Sep 2016

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The high energy electrons produced in the krebs cycle are passed to the electron transport chain a. ii. The electron transport chain uses the high-energy electrons from krebs. High energy electrons from nadh and fadh2 are passed along the electron transport chain a. iv. In eukaryotes, the electron transport chain is composed of a series of carrier proteins that is located in the inner membrane of the mitochondrion a. v. In prokaryotes, the same chain is in the cell membrane a. vi. High energy electrons are passed from one carrier protein to tge next a. vii. At the end of the electron transport chain is an enzyme that combines electrons from the electron chain with hydrogen ions and oxygen to form water a. viii. Oxygen serves as the final electron acceptor of the electron transport chain a. ix. Oxygen is essential for getting rid of low- energy electrons and hydrogen ions, the wastes of cellular respiration a. x.

Related Questions

The reduced coenzymes generated by the citric acid cycle donateelectrons in a series of reactions called the electron transportchain. The energy from the electron transport chain is used foroxidative phosphorylation.

a)Which compounds donate electrons to the electron transportchain?
b)Which of the following is the final electron acceptor?
c) Which of the following are the final products of the electrontransport chain and oxidative phosphorylation?

Answer choices for a), b), and c) (maybe used more than once)
1. H20
2. NADH
3. NAD+
4. ATP
5. ADP
6. O2
7. FADH2
8. FAD

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5. Almost all of the oxygen (O2) one consumes in breathing is converted to: a. acetyl-CoA. b. carbon dioxide (CO2). c. carbon monoxide and then to carbon dioxide. d. none of the above. e. water.

6. A new compound isolated from mitochondria is claimed to represent a previously unrecognized carrier in the electron transfer chain. It is given the name coenzyme Z. Which line of evidence do you feel is the least conclusive in assigning this compound a position in the electron transfer chain? a. Alternate oxidation and reduction of the mitochondrion-bound coenzyme Z can be readily demonstrated. b. Removal of coenzyme Z from the mitochondria results in a decreased rate of oxygen consumption. c. The rate of oxidation and reduction of mitochondrion-bound coenzyme is of the same order of magnitude as the overall rate of electron transfer in mitochondria as measured by oxygen consumption. d. The reduction potential of Z is between that of two compounds known to participate in the electron transport chain e. When added to a mitochondrial suspension, coenzyme Z is taken up very rapidly and specifically by the mitochondria.

7. Which of the following is not true of the citric acid cycle? a. All enzymes of the cycle are located in the cytoplasm, except succinate dehydrogenase, which is bound to the inner mitochondrial membrane. b. In the presence of malonate, one would expect succinate to accumulate. c. Oxaloacetate is used as a substrate but is not consumed in the cycle. d. Succinate dehydrogenase channels electrons directly into the electron transfer chain. e. The condensing enzyme is subject to allosteric regulation by ATP and NADH.

8. Conversion of 1 mol of acetyl-CoA to 2 mol of CO2 and CoA via the citric acid cycle results in the net production of: a. 1 mol of citrate. b. 1 mol of FADH2. c. 1 mol of NADH. d. 1 mol of oxaloacetate. e. 7 mol of ATP.

1-9 Match the following statements with the parameters A to I below.

1- Metabolite with different origins and several metabolic fates

2) Metabolite which is not consumed in the central metabolic pathway

3) Metabolite which is consumed in a metabolic pathway

4) Metabolic pathway with the same initial and final metabolite

5) Set of metabolic reactions which replenish the central metabolic pathway

6 Set of reactions through which the hydrogen ions and electrons are transferred from reduced cofactors to oxygen, obtaining water and releasing energy

7- Set of reaction which permit the interconversion of several metabolites, the end of the catabolism and the beginning of anabolism

8- Pathway which has both a catabolic and an anabolic role

9) The biosynthesis of ATP using the energy released in the electron transport chain

a) Central and amphibolic pathway

b) Feeding metabolite

c) Anaplerotic pathway

d) Electron transport chain

e) Anaplerotic metabolite

f) Crossroad metabolite

g) Oxidative phosphorylation

h) Amphibolic pathway

i) Metabolic cycle

CM-UY 1004 Lecture Notes - Lecture 9: Glycogen, Citric Acid Cycle, Membrane Transport Protein

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