Unit 5: photosynthesis, cellular respiration, Carbon cycle

During photosynthesis in plants, what is the source of the carbon in the sugar molecule (C6H12O6)?

• Carbon dioxide in the air.

• Carbon monoxide in the air.

• Carbon particles in the soil.

• Carbon particles in water.

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What happens to most of the light energy during photosynthesis?

• It is transformed into heat energy.

• It is transformed into usable energy.

• It is changed into carbon dioxide.

• It is changed into oxygen

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Which process is an outcome of photosynthesis?

• Complex modules are broken down to form simple molecules.

• Water is absorbed into the root hairs.

• Light energy is converted into chemical energy.

• Water is transported through vascular tissue.

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What happens during cellular respiration?

• Oxygen is released into the air.

• Glucose is broken down, releasing energy.

• Carbohydrates are released into the bloodstream.

• Water and carbon dioxide are converted into energy.

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Which of the following is released during cellular respiration?

• Glucose (sugar)

• Light

• Energy

• Oxygen

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Photosynthesis, respiration, and decomposition are processes that drive the ____.

• Rock cycle

• Nitrogen cycle

• Water cycle

• Carbon cycle

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Humans affect the carbon cycle by ____________.

• Burning fossil fuels, releasing carbon dioxide into the atmosphere.

• Releasing carbon dioxide into the atmosphere through the process of cellular respiration.

• Eating producers in order to obtain carbon-containing molecules such as sugar and starches.

• All of the above

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What is the role of the carbon cycle?

• To create a physical environment for organisms.

• To release oxygen into the air.

• To provide sunlight to plants so they can make food.

• To transfer matter and energy within and between organisms.

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Living organisms conserve matter and energy through the processes of ________.

• Photosynthesis and cellular respiration.

• Cellular respiration and evaporation.

• Photosynthesis and condensation.

• Cellular respiration and precipitation

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Which process is represented by the following chemical reaction?

glucose + oxygen → carbon dioxide + water + energy

• Photosynthesis

• Cellular respiration

• Meiosis

• Mitosis

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