3.3 Review

How does the Law of the Conservation of Energy apply to the process of cellular respiration?

• The energy that goes into the process of cellular respiration is lost to create new substances.

• The total amount of energy needed to complete the process of cellular respiration remains the same.

• The total amount of energy needed to complete the process of cellular respiration decreases over time.

• The energy that goes into the process of cellular respiration is used up to create new energy that is stored in the new substances.

Answer explanation

Energy is never created or destroyed, it just changes type.

The image below shows the carbon cycle.

Which statement below describes what is occurring at point 4?

• carbon is transformed by plants to make food

• carbon is being absorbed by the water from the atmosphere

• carbon entering the atmosphere due to the combustion of fossil fuels

• carbon being manufactured by removing fossil fuels from the environment

Which option below best explains how animal cells are able to use cellular respiration to carry out cellular functions?

• Water molecules found in cells are broken down to release energy and oxygen which is used for other cellular functions.

• Food provides energy and water provides oxygen, which is used to break down carbon dioxide for other cellular functions.

• Cellular respiration breaks down stored carbon dioxide found in the body to release oxygen which is then used for cellular functions.

• Breathing provides oxygen and food provides glucose, this combination allows cells to break down glucose releasing energy for the cell to carry out other functions.

Which of the following options best explains how a decrease in chlorophyll would affect the process of photosynthesis in plants?

• It will trigger plants to increase the rate of photosynthesis in order to increase the production of food.

• It will limit the amount of water the plants are able to take in, resulting in a slower rate of photosynthesis.

• It would increase the production of oxygen because the plant would need to work harder to feed themselves.

• It would limit the amount of light absorbed by the plant and decrease the amount of food the plant is able to produce for itself.

The Law of Conservation of Mass is best supported by which statement about the carbon cycle?

• The total amount of carbon decreases, as it moves through the carbon cycle.

• The total amount of carbon does not change as it moves through the carbon cycle.

• The total amount of carbon gradually increases, as it moves through the carbon cycle.

• The total amount of carbon changes depending on where it's located in the carbon cycle.

Evidence for the Law of Conservation of Mass is accurately described by which statement on how materials are used during photosynthesis?

• During photosynthesis the total mass of CO2 consumed is equal to the total mass of O2 created.

• At the end of photosynthesis, the amount of carbon dioxide used is equal to the total mass of glucose created.

• The total amount of carbon dioxide and water used to produce energy and oxygen in photosynthesis will equal the total mass.

• The total amount of glucose and oxygen produced in photosynthesis equals the total amount of water and carbon dioxide initially used.

The general process of cellular respiration is best explained by which statement?

• Food in the form of sugar is produced by living organisms by using energy from the sun and water.

• Food for organisms in the form of sugar and energy is produced when living organisms take in oxygen and water.

• Usable energy is created for an organism when an organism breaks down sugar from food combined with oxygen.

• Energy is provided to an organism when it releases carbon dioxide by consuming oxygen.

Many buddhist monks perform “meditation" which consist of slowing down their actions, and breathing deeply, after eating a snack. How does this help their bodies stay healthy?

• Breathing deeply they release more carbon dioxide which leads to more energy for cellular respiration to begin.

• In meditation they are able to take in oxygen and sugar which allows their cells to produce energy through cellular respiration.

• In meditation they are able to take in carbon dioxide and water which allows their cells to produce energy through cellular respiration.

• When eating a snack, they take in energy which converts to sugar needed by the body to produce oxygen for the monks muscles to begin cellular respiration.

Using your knowledge of the Law of Conservation of Mass, answer the following.  10 grams of material was used by an organism to perform cellular respiration.  How many grams of material would be produced?

• 0 grams

• 10 grams

• 20 grams

• 30 grams

Oxygen gas was removed for one week from a sealed container with a plant. What happened to the plant?

• The rate of Photosynthesis increased.

• The rate of Photosynthesis decreased.

• The rate of Cellular Respiration increased.

• The rate of Cellular Respiration decreased.