The most immediate source of energy for living cells is generally in
the form of

Options

A. Lipids
B. Proteins
C. Vitamins
D. Carbohydrates

Answer

To solve the question regarding the most immediate source of energy for living cells, we can follow these steps:

### Step 1: Understand the Options
We are given four options: lipids, proteins, vitamins, and carbohydrates. We need to determine which of these serves as the most immediate source of energy for living cells.

### Step 2: Analyze Each Option
- **Lipids**: While lipids are a source of energy, they are metabolized more slowly than carbohydrates. They provide energy but are not the immediate source.

- **Proteins**: Proteins can also be used for energy, but they are primarily used for growth and repair of tissues. They are not the first choice for energy.

- **Vitamins**: Vitamins are essential for various biochemical functions but do not provide energy directly.

- **Carbohydrates**: Carbohydrates are broken down quickly into glucose, which is then used to produce ATP (adenosine triphosphate), the energy currency of the cell.

### Step 3: Identify the Most Immediate Source
From the analysis, carbohydrates are the most immediate source of energy for living cells. They are readily available and can be quickly converted into usable energy.

### Conclusion
The most immediate source of energy for living cells is generally in the form of **carbohydrates**.

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