Through which conversion is energy released?
A. ADP to ATP
B. ATP to ADP
C. NADP${}^{+}$ to NADPH
D. $CO _2$ and $H _2 O$ to $C _6 H _{12} O _6$ and $O _2$
Answer (2)
ADP to ATP stores energy.
ATP to ADP releases energy.
NADP+ to NADPH stores energy.
CO2 and H2O to C6H12O6 and O2 stores energy.
Therefore, the conversion that releases energy is ATP to ADP.
Explanation
Analyzing the options We need to identify the conversion that releases energy. Let's analyze each option.
ADP to ATP ADP to ATP: This is the process of creating ATP, which stores energy. Therefore, energy is required, not released.
ATP to ADP ATP to ADP: This is the process of breaking down ATP, which releases energy. ATP is like a battery, and when it's used (converted to ADP), energy is released.
NADP+ to NADPH NADP+ to NADPH: This is a reduction reaction that stores energy in the form of NADPH. Therefore, energy is required, not released.
CO2 and H2O to C6H12O6 and O2 CO2 and H2O to C6H12O6 and O2: This is photosynthesis, which stores energy from sunlight to create glucose. Therefore, energy is required, not released.
Conclusion The conversion that releases energy is ATP to ADP.
Examples
Think of ATP as the energy currency of the cell. Just like you spend money to do things, cells 'spend' ATP to perform various functions. When ATP is converted to ADP, it's like spending that energy currency, releasing energy to power cellular processes. This energy release is crucial for muscle contraction, nerve impulse transmission, and many other vital functions. Understanding this energy transfer helps us appreciate how living organisms function at a fundamental level.
The conversion that releases energy is ATP to ADP. This process involves breaking down ATP, which is the energy currency of the cell, to provide energy for various cellular functions. Consequently, the correct answer is choice B: ATP to ADP.
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