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- 1. Multiple Choice
Which of the statements below are true? Select all that apply.
The tree uses photosynthesis to get energy from food molecules; the elephant uses cellular respiration to get energy from food molecules.
The tree and the elephant both use cellular respiration to get energy from food molecules.
Sunlight is the ultimate source of energy for both the tree and the elephant.
The tree and the elephant both use photosynthesis to make food molecules.
- 2. Multiple Choice
Which of the statements are true about the two chemical reactions? Select all that apply.
Equation A summarizes photosynthesis, and Equation B summarizes cellular respiration.
Equation A summarizes cellular respiration, and Equation B summarizes photosynthesis.
Both chemical reactions produce oxygen and energy.
The products of Equation A are the reactants for Equation B.
- 3. Multiple Choice
Animals that eat only meat, such as dolphins, do not get much sugar (carbohydrate) from their diets. Select the statement below that best explains how a dolphin gets the energy it needs from its food.
The dolphin does not use cellular respiration to get energy from food.
The dolphin is not very active so it does not need a lot of energy to function.
The dolphin’s body is able to break down other carbon-based molecules, such as proteins and fats, to use as an energy source for cellular respiration.
The dolphin gets the energy it needs directly from sunlight.
- 4. Multiple Choice
Which of the following are true statements about a chemical equation? Select all that apply.
A chemical equation models a chemical reaction.
Numbers are used in a chemical equation to show which side of the equation has more molecules.
A chemical equation uses symbols to show the relationship between parts of a chemical reaction.
The arrow in a chemical equation shows that one side of the equation has more atoms than the other.
- 5. Multiple Choice
Which of the following are involved in the release of energy during cellular respiration? Select all that apply.
sugar molecules are broken down in the cytoplasm
sugar molecules and carbon dioxide are produced in chloroplasts
molecular bonds are broken in the mitochondria by oxygen
oxygen is released along with sugar molecules
- 6. Multiple Choice
A process in which atoms are rearranged to produce new substances.
chemical reaction
reactants
products
chemical equation
- 7. Multiple Choice
The starting substances in a chemical reaction
chemical reaction
reactants
products
chemical equation
- 8. Multiple Choice
The substances formed in a chemical reaction
chemical reaction
reactants
products
chemical equation
- 9. Multiple Choice
Uses symbols to show the relationship between the starting materials and the materials produced in a chemical reaction.
chemical reaction
reactants
products
chemical equation
- 10. Multiple Choice
building blocks of living things
carbon based molecules
mitochondria
chloroplasts
- 11. Multiple Choice
a series of chemical reactions in which the cells of producers—including plants, algae, and some bacteria—use energy from the sun to make carbon-based food molecules, called sugars.
Photosynthesis
Cellular Respiration
chloroplasts
mitochondria
- 12. Multiple Choice
Cell structures that capture light energy from the sun.
chloroplasts
mitochondria
photosynthesis
cellular respiration
- 13. Multiple Choice
a process that uses oxygen to release the energy stored in food molecules.
chloroplasts
mitochondria
photosynthesis
cellular respiration
- 14. Multiple Choice
A membrane-bound organelles in plant and animal cells, where cellular respiration takes place
chloroplasts
mitochondria
photosynthesis
cellular respiration
- 15. Multiple Choice
Which statements identify possible advantages of algal biofuel? Select all that apply.
Algae grow quickly and are a renewable source of energy.
Algae can be grown in water sources that cannot be used for drinking or agriculture.
Algal biofuel is not established on a large scale, so farming and fuel production methods cannot meet current global needs for energy.
Algae can be supplied with the carbon dioxide they need to grow using emissions from power plants and other industrial sources.
- 16. Multiple Choice
Fuels that are produced from plant or animal matter.
biofuels
chemical reaction
reactants
products
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