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 of the following best describes the structures of carbohydrates?

They consist of nucleotides joined by phosphodiester bonds.

They are hydrophobic molecules composed mainly of fatty acids and glycerol.

They are long chains of amino acids linked by peptide bonds.

They are composed of carbon, hydrogen, and oxygen, typically in a ratio of 1:2:1, and can exist as monosaccharides, disaccharides, or polysaccharides.

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Verified step by step guidance

Understand the question: The problem is asking for the best description of the structure of carbohydrates. To solve this, we need to analyze the options and identify the one that accurately describes carbohydrates based on their biochemical properties.

Review the structure of carbohydrates: Carbohydrates are organic molecules composed of carbon (C), hydrogen (H), and oxygen (O), typically in a ratio of 1:2:1. For example, glucose (C₆H₁₂O₆) follows this ratio.

Classify carbohydrates: Carbohydrates can exist in different forms, such as monosaccharides (single sugar units like glucose and fructose), disaccharides (two sugar units like sucrose and lactose), and polysaccharides (long chains of sugar units like starch, glycogen, and cellulose).

Eliminate incorrect options: Analyze the other options provided. For example, nucleotides joined by phosphodiester bonds describe nucleic acids, fatty acids and glycerol describe lipids, and amino acids linked by peptide bonds describe proteins. These do not match the structure of carbohydrates.

Select the correct answer: The correct description of carbohydrates is that they are composed of carbon, hydrogen, and oxygen, typically in a ratio of 1:2:1, and can exist as monosaccharides, disaccharides, or polysaccharides.