Adenosine triphosphate (ATP) is present in

Options

A. Animal cells
B. Plant cells
C. Microorganism
D. All of these

Answer

### Step-by-Step Solution:

1. **Understanding ATP**: Adenosine triphosphate (ATP) is a crucial molecule in biology. It is often referred to as the "energy currency" of the cell because it stores and provides energy for various cellular processes.

2. **Presence in Living Organisms**: ATP is found in all living cells, which includes animal cells, plant cells, and microorganisms. This is because all living organisms require energy to perform essential functions.

3. **Function of ATP**: ATP captures chemical energy derived from the breakdown of food molecules. This energy is then released to fuel various cellular processes, such as muscle contraction, nerve impulse propagation, and biosynthesis.

4. **Structure of ATP**: ATP is a nucleotide composed of three phosphate groups, a ribose sugar, and an adenine base. The bonds between the phosphate groups are high-energy bonds, which, when broken, release energy.

5. **Conclusion**: Since ATP is essential for the energy needs of all living cells, it is present in animal cells, plant cells, and microorganisms. Therefore, the correct answer to the question is "all of these."

### Final Answer:
Adenosine triphosphate (ATP) is present in animal cells, plant cells, and microorganisms.

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