Photosynthesis and Cellular Respiration Quiz

Margie used arrows to represent the gases that enter and leave a plant during the process of photosynthesis, as shown below. Which gases do arrows 1 and 2 represent?

• Arrow 1 is oxygen and arrow 2 is nitrogen.

• Arrow 1 is nitrogen and arrow 2 is oxygen.

• Arrow 1 is oxygen and arrow 2 is carbon dioxide.

• Arrow 1 is carbon dioxide and arrow 2 is oxygen.

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Tony sets up an experiment inside his classroom. He spaces 5 plants at equal distances along a straight line, with the first plant directly in front of a window and the last plant 10 meters (m) away from the window. He gives them equal access to air and water and then monitors the amount of gas each plant releases. Which gas is Tony monitoring and what trend is he most likely to see in the data he collects?

• He is monitoring oxygen. The amount of gas released should be highest for the plant in the middle and lowest for the plants at the ends.

• He is monitoring carbon dioxide. The amount of gas released should be highest for the plant in the middle and lowest for the plants at the ends.

• He is monitoring oxygen. The amount of gas released should be highest for the plant closest to the window and lowest for the plant farthest away from the window.

• He is monitoring carbon dioxide. The amount of gas released should be highest for the plant closest to the window and lowest for the plant farthest away from the window.

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After food is consumed, chemical nutrients are absorbed into the blood. The blood then carries these nutrients to the body's cells where the nutrients enter mitochondria. Which reaction must occur next for the cell to carry on other activities?

• Glucose and water combine to produce high-energy molecules.

• Glucose and oxygen combine to produce high-energy molecules.

• Oxygen, light, and glucose combine to produce high-energy molecules.

• Oxygen, carbon dioxide, and glucose combine to produce high-energy molecules.

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Cellular respiration occurs in the body 24 hours per day. During exercise, the rate of cellular respiration increases. Why does increased cellular respiration cause people to breathe faster?

• More oxygen is needed to produce energy, and more carbon dioxide waste must be removed from the body.

• More nutrients are needed to produce more energy, and more oxygen must be removed from the body.

• More heat is generated by the body, and breathing cools the body quickly.

• More water is lost from the body, and breathing hydrates the body.

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Which statement about cellular respiration in plants and animals is true?

• Both plants and animals need water to start cellular respiration.

• Both plants and animals release energy from glucose in cellular respiration.

• Both plants and animals take in carbon dioxide to break down glucose in cellular respiration.

• Both plants and animals need chlorophyll to make glucose before using it in cellular respiration.

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Many athletes use altitude training to improve their performance. They travel to areas of high altitude where there is less oxygen in the air. The body adapts to the stress of less oxygen by becoming more efficient at transporting and using oxygen. What are athletes who train in high altitudes most likely trying to enhance?

• energy production in the mitochondria

• enhancement of the nervous system

• pH balance of red blood cells

• building of muscle tissue

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Sierra is asked to demonstrate how carbon travels from the atmosphere to living organisms, then back to the atmosphere. She draws a diagram showing carbon dioxide from the atmosphere being taken in by a plant. An animal then consumes the carbon dioxide in the plant, uses it as a source of energy, then exhales, returning the carbon dioxide to the atmosphere. Which of the following statements indicates a correction that needs to be made on Sierra's diagram?

• Animals do not release carbon dioxide; only plants do.

• Animals do not use carbon dioxide as an energy source; they use sugars or starches.

• Plants do not absorb carbon dioxide from the atmosphere; they only absorb it from the ground.

• Plants do not transfer carbon dioxide to animals; animals absorb it directly from the atmosphere.

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Parker has a toy car he has made out of plastic building blocks. He breaks it apart so he can build something different with the same blocks. When he breaks the blocks apart, which stage of the carbon cycle is he best demonstrating?

• carbon atoms dissolving in the oceans

• producers removing carbon from the atmosphere

• organisms decay and carbon atoms return to the soil

• consumers use carbon atoms to build body structures

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Isabel needs an image to represent the carbon cycle for a presentation in her science class. Based on the information represented in the concept models above, which statement is true?

• Model A would be the best model for the carbon cycle because carbon depletes over time as it is used by different organisms.

• Model B would be the best model for the carbon cycle because carbon will follow the same path when it is transferred from one place to another.

• Model C would be the best model for the carbon cycle because the carbon cycle has a definite beginning and end where carbon eventually cannot be reused.

• Model D would be the best model for the carbon cycle because the carbon cycle is a flow of matter which can take different paths bringing carbon back to the same place

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A student is drawing a model of the carbon cycle. Which caption should he include to explain how herbivores contribute to the carbon cycle from the food they eat?

• Herbivores eat plants, which produces carbon dioxide during cellular respiration that is released into the atmosphere

• Herbivores eat plants, which produces carbon dioxide during photosynthesis that is released into the atmosphere.

• Herbivores use carbon dioxide from the atmosphere to produce oxygen during cellular respiration.

• Herbivores use oxygen from the atmosphere to produce carbon dioxide during photosynthesis.

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