Which carbohydrate has highest abundance in human blood

Options

A. D-fructose
B. D-glucose
C. Sucrose
D. Lactose

Answer

To determine which carbohydrate has the highest abundance in human blood, we can analyze the options provided: D-fructose, D-glucose, sucrose, and lactose.

**Step 1: Understand the role of carbohydrates in human blood.**
Carbohydrates are essential biomolecules that serve as a primary source of energy for the body. In the bloodstream, they exist in various forms, but glucose is the most significant.

**Step 2: Identify the main carbohydrate in human blood.**
Among the carbohydrates listed, D-glucose (often referred to simply as glucose) is the primary sugar found in human blood. It is commonly known as blood sugar and is crucial for providing energy to cells.

**Step 3: Consider the other options.**
- D-fructose is another sugar but is not as abundant in the blood as glucose.
- Sucrose is a disaccharide composed of glucose and fructose, but it is not directly present in high concentrations in the blood.
- Lactose is a disaccharide found in milk, and while it can be present in the blood, it is not as abundant as glucose.

**Step 4: Conclude the answer.**
Based on the information, D-glucose is the carbohydrate that has the highest abundance in human blood.

**Final Answer: D-glucose.**

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