Table of contents

1. Introduction to Biochemistry4h 34m
2. Water3h 23m
3. Amino Acids8h 10m
4. Protein Structure10h 4m
5. Protein Techniques14h 5m
6. Enzymes and Enzyme Kinetics13h 38m
7. Enzyme Inhibition and Regulation 8h 42m
8. Protein Function 9h 41m
9. Carbohydrates7h 49m
10. Lipids5h 49m
11. Biological Membranes and Transport 6h 37m
12. Biosignaling9h 45m
Review 1: Nucleic Acids, Lipids, & Membranes2h 47m
Review 2: Biosignaling, Glycolysis, Gluconeogenesis, & PP-Pathway3h 12m
Review 3: Pyruvate & Fatty Acid Oxidation, Citric Acid Cycle, & Glycogen Metabolism2h 26m
Review 4: Amino Acid Oxidation, Oxidative Phosphorylation, & Photophosphorylation1h 48m

6. Enzymes and Enzyme Kinetics

Enzymes

Biochemistry

6. Enzymes and Enzyme Kinetics

Enzymes

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Multiple Choice

Which reaction is catalyzed by the enzyme glucose-6-phosphate isomerase in glycolysis?

Conversion of fructose-1,6-bisphosphate to glyceraldehyde-3-phosphate

Conversion of glucose to glucose-6-phosphate

Conversion of phosphoenolpyruvate to pyruvate

Conversion of glucose-6-phosphate to fructose-6-phosphate

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Verified step by step guidance

Step 1: Understand the role of glucose-6-phosphate isomerase in glycolysis. This enzyme catalyzes the isomerization of glucose-6-phosphate to fructose-6-phosphate, which is an essential step in the glycolytic pathway.

Step 2: Recall that glycolysis is the metabolic pathway where glucose is broken down to produce energy. Glucose-6-phosphate isomerase facilitates the rearrangement of the six-carbon sugar molecule from an aldose (glucose-6-phosphate) to a ketose (fructose-6-phosphate).

Step 3: Write the chemical equation for the reaction catalyzed by glucose-6-phosphate isomerase:

{Glucose}_{6} - {phosphate}_{6} \to {Fructose}_{6} - {phosphate}_{6}

Step 4: Recognize that this reaction is reversible and occurs early in glycolysis, after glucose is phosphorylated to glucose-6-phosphate by hexokinase or glucokinase.

Step 5: Eliminate the incorrect options by comparing the enzyme's specific function. Glucose-6-phosphate isomerase does not catalyze the conversion of fructose-1,6-bisphosphate to glyceraldehyde-3-phosphate, glucose to glucose-6-phosphate, or phosphoenolpyruvate to pyruvate. Its specific role is the conversion of glucose-6-phosphate to fructose-6-phosphate.