MEGA
Energy in Biology
Cellular respiration is a chemical process in which the bonds between atoms of food molecules and oxygen molecul…
Item EB022002: The process by which organisms obtain energy from food involves a chemical reaction between oxygen and carbon-containing molecules from food. During the reaction, atoms are rearranged to form different molecules, and energy is released as the bonds of these new molecules form.
Which of the following statements is TRUE about the process by which organisms obtain energy from food for life’s processes?
- The process of obtaining energy involves a chemical reaction that breaks down carbon-containing molecules from food and turns the atoms into energy.
- The process of obtaining energy involves a chemical reaction that breaks the bonds between the atoms of the carbon-containing molecules from food. Energy is released when the bonds between atoms break.
- The process of obtaining energy involves a chemical reaction between oxygen and carbon-containing molecules from food. During the reaction, atoms are rearranged to form different molecules, and energy is released as the bonds of these new molecules form.
- The process of obtaining energy does not involve a chemical reaction. Food is energy, so nothing else has to be done to the food to get energy from it.
- Distribution of Responses
- Points Earned
| Group | Correct | Total | Percent |
|---|---|---|---|
| Overall | 48 | 122 | 39% |
| Grades | |||
| 6–8 | N/A | N/A | N/A |
| 9–12 | 45 | 115 | 39% |
| Gender | |||
| Male | 26 | 69 | 38% |
| Female | 18 | 42 | 43% |
| Primary Language | |||
| English | 40 | 108 | 37% |
| Other | 5 | 6 | 83% |
- Distribution of Responses
- Points Earned
| Group | Correct | Total | Percent |
|---|---|---|---|
| Overall | 67 | 144 | 47% |
| Grades | |||
| 6–8 | N/A | N/A | N/A |
| 9–12 | 62 | 136 | 46% |
| Gender | |||
| Male | 31 | 84 | 37% |
| Female | 27 | 44 | 61% |
| Primary Language | |||
| English | 58 | 122 | 48% |
| Other | 3 | 10 | 30% |
- Disciplinary Core Ideas
- PS1.A A stable molecule has less energy than the same set of atoms separated; one must provide at least this energy in order to take the molecule apart.
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.