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

Review 3: Pyruvate & Fatty Acid Oxidation, Citric Acid Cycle, & Glycogen Metabolism

Glycogen Metabolism 1

Biochemistry

Review 3: Pyruvate & Fatty Acid Oxidation, Citric Acid Cycle, & Glycogen Metabolism

Glycogen Metabolism 1

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Multiple Choice

Which of the following enzymes are required for glycogen degradation in humans?

Glycogen phosphorylase and debranching enzyme

Hexokinase and phosphofructokinase-1

Phosphoglucomutase and glucose-6-phosphatase only

Glycogen synthase and branching enzyme

Next problem

Verified step by step guidance

Step 1: Understand the process of glycogen degradation in humans. Glycogen degradation involves breaking down glycogen into glucose-1-phosphate and free glucose molecules to provide energy. This process requires specific enzymes.

Step 2: Identify the key enzymes involved in glycogen degradation. Glycogen phosphorylase is responsible for cleaving α-1,4 glycosidic bonds in glycogen to release glucose-1-phosphate. Debranching enzyme is required to handle α-1,6 glycosidic bonds at branch points in glycogen.

Step 3: Eliminate options that are not relevant to glycogen degradation. For example, hexokinase and phosphofructokinase-1 are involved in glycolysis, not glycogen degradation. Similarly, glycogen synthase and branching enzyme are involved in glycogen synthesis, not degradation.

Step 4: Consider the role of phosphoglucomutase and glucose-6-phosphatase. Phosphoglucomutase converts glucose-1-phosphate to glucose-6-phosphate, which can enter glycolysis or be converted to free glucose by glucose-6-phosphatase in the liver. However, these enzymes are downstream of glycogen degradation and not directly involved in breaking down glycogen.

Step 5: Conclude that the correct enzymes required for glycogen degradation are glycogen phosphorylase and debranching enzyme, as they directly participate in breaking down glycogen into usable forms of glucose.