To determine which equation shows one way that a plant cell stores energy in an energy carrier molecule, we need to understand the role of specific molecules in energy storage within plant cells.
1. ADP and ATP:
- ADP (Adenosine Diphosphate) + [tex]\( P_i \)[/tex] (inorganic phosphate) → ATP (Adenosine Triphosphate) is a common biological method for storing energy.
- ATP stores energy in its high-energy phosphate bonds, and the conversion of ADP to ATP captures energy.
2. NADP[tex]\(^+\)[/tex] and NADPH:
- NADP[tex]\(^+\)[/tex] (Nicotinamide Adenine Dinucleotide Phosphate) + [tex]\( H^+\)[/tex] → NADPH (Nicotinamide Adenine Dinucleotide Phosphate Hydrogen) is another method of storing energy.
- NADPH is an energy carrier involved in photosynthesis, capturing and transporting electrons.
3. Using the options provided:
- Option A: ADP + [tex]\( H^+\)[/tex] → ATP
- Incorrect. [tex]\( H^+\)[/tex] alone is not involved in converting ADP to ATP.
- Option B: NADP[tex]\(^+\)[/tex] + [tex]\( P \)[/tex] → ATP
- Incorrect. NADP[tex]\(^+\)[/tex] and [tex]\( P\)[/tex] are not directly involved in ATP formation. NADP[tex]\(^+\)[/tex] forms NADPH, not ATP.
- Option C: NADP[tex]\(^+\)[/tex] + [tex]\( H^+\)[/tex] → NADPH
- Correct. This is how NADP[tex]\(^+\)[/tex] stores energy to form NADPH during photosynthesis.
- Option D: ATP + NADPH → ADP
- Incorrect. This equation shows utilization of energy, not storage.
Thus, the correct equation that shows one way a plant cell stores energy in an energy carrier molecule is:
Option C: [tex]\( \text{NADP} ^{+} + H ^{+} \rightarrow \text{NADPH} \)[/tex].
