ATP and NADPH_2, are called

Options

A. Assimilatory power
B. Energy currency
C. Regular
D. Transporter molecule

Answer

**Step-by-Step Solution:**

1. **Understanding ATP and NADPH2**: ATP (Adenosine Triphosphate) and NADPH2 (Nicotinamide Adenine Dinucleotide Phosphate) are important molecules produced during the light reactions of photosynthesis. They serve as energy carriers and reducing agents, respectively.

2. **Formation During Photosynthesis**: Both ATP and NADPH2 are generated during the light-dependent reactions of photosynthesis. These reactions occur in the thylakoid membranes of chloroplasts when light energy is absorbed.

3. **Role in Dark Reactions**: In the subsequent phase of photosynthesis known as the dark reactions (or Calvin cycle), ATP and NADPH2 are utilized to convert carbon dioxide (CO2) into glucose (a carbohydrate). This process is known as carbon fixation.

4. **Assimilator Power**: Since ATP and NADPH2 are essential for the assimilation of CO2 into carbohydrates, they are referred to as "assimilator power." This term emphasizes their role in driving the synthesis of organic compounds from inorganic carbon sources.

5. **Conclusion**: Therefore, ATP and NADPH2 are called "assimilator power" because they provide the necessary energy and reducing power for the assimilation of CO2 during the dark reactions of photosynthesis.

**Final Answer**: ATP and NADPH2 are called "assimilator power."

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