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BIOL 112 Lecture Notes - Lecture 5: Glycolysis, Oxaloacetic Acid, Cellular Respiration

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indigowasp695
26 Nov 2016
School
UBC
Department
Biology
Course
BIOL 112
Professor
Marcia Graves

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BIOL 112 Full Course Notes
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BIOL 112 Full Course Notes
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Document Summary

Glycolysis occurs in almost all living organisms, but does not generate much energy as atp: end product (pyruvate) still contains lots of chemical potential energy in its bonds. In presence of oxygen, pyruvate can be further oxidized to release more energy: first to acetyl-coa and then in series of reactions in citric acid cycle. Pyruvate oxidation as key step that links glycolysis to citric acid cycle. Oxidation of pyruvate connects glycolysis to citric acid cycle. End product of glycolysis, pyruvate, gets transported to mitochondria: double membrane system with distances between the two depending due to folds of inner membrane, membranes define two spaces: Intermembrane space (space b/w inner and outer membrane) Mitochondrial matrix (space enclosed by inner membrane system) Pyruvate is brought to mitochondrial matrix and is converted into acetyl-coa: pyruvate molecule is oxidized and splits off to form carbon dioxide. Most oxidized and least energetic version of carbon.

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Related Questions

Where does each of these processes take place within the cell? Possible answers: cytosol, mitochondrial matrix, lysosome, nucleus, inner mitochondrial membrane, outer mitochondrial membrane, mitochondrial intermembrane space

1. Glycolysis cytosol

2. citric acid cycle Mitochondrial Matrix

3. conversion of pyruvate to activated acetyl groups

4. oxidation of fatty acids to acetyl CoA

5. glycogen breakdown

6. release of fatty acids from triacylglycerols

7. oxidative phosphorylation

1.) Certain complexes of the mitochondrial electron transport chain pump protons. Which of the following BEST describes the movement of protons in this situation?

a.) across the outer mitochondrial membrane, from the cytoplasm to the intermembrane space

b.) across the outer mitochondrial membrane, from the intermembrane space to the cytoplasm

c.) across the inner mitochondrial membrane, from the intermembrane space to the matrix

d.) across the inner mitochondrial membrane, from the matrix to the inter membrane space

2.) Which regulatory mechanism is activated when the overall energy availability of a cell is high?

a.) Citrate inhibits phosphofructokinase-1.

b.) ADP up-regulates phosphofructokinase-1.

c.) ATP inhibits phosphofructokinase-1.

d.) AMP up-regulates phosphofructokinase-1.

3.) Electron carriers are oxidized during which of the following reactions?

a.) glycolysis

b.) citric acid cycle

c.) electron transport chain

d.) the conversion of pyruvate to acetyl coA

e.) all of the above

1. How H+ are pumped across the inner mitchondrial membrane when one FADH2 undergoes oxidation via electron transport? Express your answer as an integer?

2.Using the value of 7.3 kcal/mole fir ATP , how many kcal can be produced from the ATP provided by the reaction of 1 mole of glucose in each of the following?

a. Glycolysis give your ans. using 2 sig fig.

b. Oxidation of pyruvate to acetyl-CoA give ans using 2 sig fig.

c. citric acid cycle give ans. using 2 sig fig.

d. Complete oxidation to CO2 & H2O give ans. to 2 sig fig.

3.How many H+ are pumped across the inner mitchondrial membrane when one NADH undergoes oxidation via electron transport? Express your ans as an integer.