MEGA
Energy in Biology
Cellular respiration is a chemical process in which the bonds between atoms of food molecules and oxygen molecul…
Item EB039002: The reaction between glucose + oxygen to form carbon dioxide + water transfers energy to the reaction between ADP + Pi to form ATP + H2O and the reaction between ATP + H2O to form ADP + Pi transfers energy to allow a person to move.
An energy transfer model shows the direction of energy transfer between two systems. Each box in the model represents a system and the thick arrow between the boxes represents the direction of energy transfer. Each box represents a chemical reaction or process that either gives off or takes in energy. Processes that give off energy are represented with a curved arrow pointing down and processes that take in energy are represented by a curved arrow pointing up.
Which of the following transfer diagrams illustrates how a person gets the energy needed to run?
- Distribution of Responses
- Points Earned
| Group | Correct | Total | Percent |
|---|---|---|---|
| Overall | 94 | 325 | 29% |
| Grades | |||
| 6–8 | N/A | N/A | N/A |
| 9–12 | 90 | 288 | 31% |
| Gender | |||
| Male | 53 | 164 | 32% |
| Female | 37 | 126 | 29% |
| Primary Language | |||
| English | 83 | 271 | 31% |
| Other | 6 | 14 | 43% |
- Distribution of Responses
- Points Earned
| Group | Correct | Total | Percent |
|---|---|---|---|
| Overall | 184 | 340 | 54% |
| Grades | |||
| 6–8 | N/A | N/A | N/A |
| 9–12 | 174 | 316 | 55% |
| Gender | |||
| Male | 106 | 182 | 58% |
| Female | 65 | 127 | 51% |
| Primary Language | |||
| English | 159 | 288 | 55% |
| Other | 10 | 23 | 43% |
- Disciplinary Core Ideas
- PS3.D Cellular respiration in plants and animals involve chemical reactions with oxygen that release stored energy. In these processes, complex molecules containing carbon react with oxygen to produce carbon dioxide and other materials.
LS1.C As a result of these chemical reactions, energy is transferred from one system of interacting molecules to another. Cellular respiration is a chemical process in which the bonds of food molecules and oxygen molecules are broken and new compounds are formed that can transport energy to muscles. Cellular respiration also releases the energy needed to maintain body temperature despite ongoing energy transfer to the surrounding environment. - Notes
- College Board, S.4.2: Energy Transfer, grades 9-12: • The transfer of chemical energy within living systems involves chemical reactions among ATP, ADP and an inorganic phosphate. The conversion of ATP to ADP and an inorganic phosphate drives other essential reactions in living systems. • During cellular respiration, molecules from food — mainly sugars and fats — are converted in the presence of oxygen into carbon dioxide and water, and the chemical energy of that reaction is used to combine ADP and an inorganic phosphate to make ATP.