Question

1. how do we get energy to fuel our cells?
2. what organic molecule is broken down into chemical energy to fuel our cells?
3. compare/contrast structure of atp & adp.
4. which structure, atp or adp, contains more stored energy? where is the energy?
5. which energy is high and which is low energy?
6. some organisms, such as ___, absorb energy from sunlight.
7. which carbon - based molecule stores the most energy and provides the most atp when broken down?
8. where is chemical energy stored in foods?
9. explain the atp/adp cycle using a diagram.

Explanation:

1. We obtain energy to fuel our cells through cellular respiration, which breaks down organic molecules like glucose to produce ATP.
2. Organic molecules are broken down into chemical energy by metabolic processes in the cells.
3. ATP (adenosine - triphosphate) has a high - energy phosphate bond structure compared to ADP (adenosine - diphosphate). When a phosphate group is added to ADP, ATP is formed, storing energy; when the phosphate bond in ATP is broken, energy is released.
4. Energy is stored in chemical bonds, especially in high - energy molecules like ATP.
5. High - energy molecules like ATP store more energy in their phosphate bonds compared to lower - energy molecules.
6. Organic molecules such as carbohydrates, fats, and proteins contain high energy in their chemical bonds.
7. Photosynthetic organisms absorb energy from sunlight and convert it into chemical energy in the form of glucose and other organic molecules.
8. Carbohydrates (such as glucose), fats, and proteins are carbon - based molecules that store energy. When these molecules are broken down during metabolism, the energy stored in their chemical bonds is released to form ATP.
9. Chemical energy in foods is stored in the chemical bonds of molecules such as carbohydrates, fats, and proteins.
10. The ATP/ADP cycle involves the conversion of ADP to ATP by adding a phosphate group (endergonic reaction, storing energy) and the conversion of ATP to ADP by removing a phosphate group (exergonic reaction, releasing energy). This cycle is central to energy transfer in cells.

Answer:

1. Through cellular respiration.
2. By metabolic processes breaking down organic molecules.
3. ATP has a high - energy phosphate bond structure compared to ADP.
4. In chemical bonds.
5. High - energy molecules like ATP.
6. Carbohydrates, fats, proteins.
7. Photosynthetic organisms.
8. Carbohydrates, fats, proteins.
9. In the chemical bonds of molecules like carbohydrates, fats, proteins.
10. ADP is converted to ATP by adding a phosphate group to store energy, and ATP is converted to ADP by removing a phosphate group to release energy.