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

9. Carbohydrates

Disaccharides

Biochemistry

9. Carbohydrates

Disaccharides

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Multiple Choice

What is the common name of the disaccharide formed by the combination of glucose and galactose?

Maltose

Cellobiose

Sucrose

Lactose

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Verified step by step guidance

Understand the question: The problem asks for the common name of the disaccharide formed by the combination of glucose and galactose. This requires knowledge of carbohydrate biochemistry and the structure of disaccharides.

Recall the definition of a disaccharide: A disaccharide is formed when two monosaccharides are joined by a glycosidic bond during a condensation reaction, releasing a molecule of water.

Identify the monosaccharides involved: Glucose and galactose are the two monosaccharides mentioned in the problem. These are both hexoses (six-carbon sugars) and are commonly found in biological systems.

Learn the specific disaccharide formed: When glucose and galactose combine, they form lactose, which is commonly known as milk sugar. Lactose is a disaccharide composed of β-D-galactose and β-D-glucose linked by a β-1,4-glycosidic bond.

Compare with the other options: Maltose is formed from two glucose molecules, cellobiose is derived from two glucose molecules in a β-1,4 linkage, and sucrose is formed from glucose and fructose. None of these match the combination of glucose and galactose, confirming that the correct answer is lactose.