__________ is the most important monosaccharide for humans as red blood cells & nervous tissues rely on it for energy. When 2 of these molecules bond together they form __________, which is found in honey, sweet potatoes, beer, & grain-based foods.

• A. Glucose; maltose.
• B. Sucrose; maltose.
• C. Glucose; sucrose.
• D. Fructose; sucrose.

Answer: (A)

Verified step by step guidance

1. Step 1: Understand the question. The problem is asking about the most important monosaccharide for humans and the disaccharide formed when two of these monosaccharides bond together. It also provides examples of foods where the disaccharide is found.
2. Step 2: Recall the definition of a monosaccharide. Monosaccharides are the simplest form of carbohydrates and include glucose, fructose, and galactose. Glucose is the primary energy source for the body, especially for red blood cells and nervous tissues.
3. Step 3: Recall the definition of a disaccharide. Disaccharides are carbohydrates formed when two monosaccharides bond together through a glycosidic bond. Examples include maltose (glucose + glucose), sucrose (glucose + fructose), and lactose (glucose + galactose).
4. Step 4: Analyze the food examples provided in the question. Honey, sweet potatoes, beer, and grain-based foods are rich in maltose, which is formed by the bonding of two glucose molecules.
5. Step 5: Match the correct pair of answers. Based on the information, glucose is the most important monosaccharide, and maltose is the disaccharide formed when two glucose molecules bond together. Therefore, the correct answer is 'Glucose; maltose.'