Photosynthesis and Cellular Respiration

What materials do plants use to make food?

• soil and water

• water and oxygen

• carbon dioxide and water

• carbonic acid and nitrogen

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What is the source of energy for plant and animal cells

• soil

• oxygen

• consumers

• carbon-based molecules

Answer explanation

Remember that all living things use glucose as energy. Glucose = C6H12O6, making it a carbon-based molecule.

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What are the products of photosynthesis?

• glucose and oxygen

• carbon dioxide and water

• chlorophyll, protein, and DNA

• plant stems, leaves, and root systems

Answer explanation

Remember that the purpose of photosynthesis is to create glucose, a sugar that provides energy. Oxygen is produced as a by-product.

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NGSS.MS-LS1-6

Animals breathe in oxygen and breathe out carbon dioxide. Where does the carbon dioxide come from?

• it is produced during photosynthesis

• it is a product of cellular respiration

• it is needed to create energy for cells

• it is created when plants are consumed

Answer explanation

Remember that we, as humans, release carbon dioxide when we exhale. This is through cellular respiration which is when we our bodies process the glucose and oxygen, producing carbon dioxide and water.

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NGSS.MS-LS2-3

What happens to glucose inside a cell during cellular respiration?

• The cell uses carbonic acid to break down glucose.

• The cell uses water to break down glucose.

• The cell uses oxygen to break down glucose.

• The cell uses nitrogen to break down glucose.

Answer explanation

Think of the reactants of cellular respiration: glucose and oxygen.

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There is a connection between photosynthesis and cellular respiration. The products from one provide the raw materials for the other. What products of photosynthesis are starting materials for cellular respiration?

• energy and carbon

• glucose and oxygen

• carbon dioxide and water

• chlorophyll and chloroplasts

Answer explanation

Think about the products of photosynthesis

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Why are animals important to the process of photosynthesis?

• Animals eat plants, which makes space for more plants to grow.

• Animals digest food, which provides the starting materials for photosynthesis.

• Animals release carbon dioxide, which provides the starting materials for photosynthesis.

• Animals produce energy in the form of heat, which is necessary for photosynthesis to occur.

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NGSS.MS-LS1-6

Two important processes that cells use are photosynthesis and cellular respiration. Describe these two processes.

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NGSS.MS-LS1-6

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Fossil fuels come from decomposed plants and animals that were buried in the ground millions of years ago.

Explain why burning fossil fuels releases carbon dioxide.

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The picture shows the process of photosynthesis. One of the products of photosynthesis is not shown in the diagram. What is the missing product? Describe the role of this substance in plant cells (2pts)

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NGSS.MS-LS1-6

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