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

1. Introduction to Biochemistry

Carbohydrates

Biochemistry

1. Introduction to Biochemistry

Carbohydrates

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Multiple Choice

Which two types of glycosidic bonds are found in both glycogen and amylopectin?

$\alpha(1\rightarrow4)$ and $\alpha(1\rightarrow6)$

$\beta(1\rightarrow4)$ and $\alpha(1\rightarrow6)$

$\beta(1\rightarrow4)$ and $\beta(1\rightarrow6)$

$\alpha(1\rightarrow4)$ and $\beta(1\rightarrow6)$

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Verified step by step guidance

Step 1: Understand the structure of glycogen and amylopectin. Both are polysaccharides composed of glucose units and serve as energy storage molecules in organisms. Glycogen is found in animals, while amylopectin is a component of starch in plants.

Step 2: Recall the types of glycosidic bonds. Glycosidic bonds are covalent bonds formed between carbohydrate molecules. The two main types of glycosidic bonds in polysaccharides are: (1) α(1→4), which connects glucose units in a linear chain, and (2) α(1→6), which forms branch points in the structure.

Step 3: Analyze the branching structure. Both glycogen and amylopectin are branched polysaccharides. The linear chains are connected by α(1→4) glycosidic bonds, while the branch points are formed by α(1→6) glycosidic bonds.

Step 4: Eliminate incorrect options. Glycogen and amylopectin do not contain β(1→4) or β(1→6) glycosidic bonds, as these are typically found in other polysaccharides like cellulose. Additionally, there are no β(1→6) bonds in their structure.

Step 5: Conclude that the correct answer is α(1→4) and α(1→6) glycosidic bonds, as these are the two types of bonds found in both glycogen and amylopectin.