MEGA
Energy in Biology
Cellular respiration is a chemical process in which the bonds between atoms of food molecules and oxygen molecul…
Item EB033003: When animals build body structures, the energy-releasing chemical reaction between glucose + oxygen to produce carbon dioxide + water transfers energy to the energy-requiring reaction between amino acids to build proteins + water.
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 models illustrates how an animal gets the energy needed to build body structures?
- Distribution of Responses
- Points Earned
| Group | Correct | Total | Percent |
|---|---|---|---|
| Overall | 19 | 139 | 14% |
| Grades | |||
| 6–8 | N/A | N/A | N/A |
| 9–12 | 19 | 131 | 15% |
| Gender | |||
| Male | 9 | 75 | 12% |
| Female | 10 | 52 | 19% |
| Primary Language | |||
| English | 19 | 123 | 15% |
| Other | 0 | 7 | 0% |
- Distribution of Responses
- Points Earned
| Group | Correct | Total | Percent |
|---|---|---|---|
| Overall | 50 | 160 | 31% |
| Grades | |||
| 6–8 | N/A | N/A | N/A |
| 9–12 | 49 | 150 | 33% |
| Gender | |||
| Male | 31 | 94 | 33% |
| Female | 17 | 49 | 35% |
| Primary Language | |||
| English | 45 | 136 | 33% |
| Other | 3 | 10 | 30% |
- 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 The sugar molecules thus formed contain carbon, hydrogen, and oxygen: their hydrocarbon backbones are used to make amino acids and other carbon-based molecules that can be assembled into larger molecules (such as proteins or DNA), used for example to form new cells.
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.