Instantaneous source of energy is

Options

A. Proteose
B. fructose
C. sucrose
D. glucose

Answer

To solve the question "Instantaneous source of energy is," we need to analyze the options provided: A) proteases, B) fructose, C) sucrose, and D) glucose.

### Step-by-Step Solution:

1. **Understanding the Question**: We need to identify which of the given options acts as an instantaneous source of energy. Instantaneous energy refers to energy that can be quickly utilized by the body without the need for extensive digestion.

2. **Analyzing Each Option**:
- **A) Proteases**: These are enzymes that break down proteins into amino acids. They do not provide energy directly and are not a source of energy themselves.
- **B) Fructose**: This is a simple sugar (monosaccharide) found in many plants. While it can provide energy, it is not as rapidly utilized as glucose.
- **C) Sucrose**: This is a disaccharide composed of glucose and fructose. It needs to be broken down into its monosaccharide components before it can be used for energy, making it less instantaneous.
- **D) Glucose**: This is a monosaccharide and the simplest form of carbohydrate. It is readily absorbed into the bloodstream and can be used immediately for energy by the body's cells.

3. **Conclusion**: Among the options, glucose is the only one that can be absorbed directly and used quickly for energy. Therefore, it is the correct answer.

### Final Answer:
The instantaneous source of energy is **D) glucose**.

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