Chapter 3 Cell Processes and Energy

During a science class, Benjamin and Avery were discussing the process of photosynthesis. What are the products of photosynthesis?

• carbon dioxide and water

• oxygen and water

• carbon dioxide and sugars

• oxygen and sugars

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Nora and James are learning about how plants help other living things. How does photosynthesis benefit heterotrophs?

• It adds carbon dioxide to the air.

• It creates food they can eat.

• It eliminates harmful sugars.

• It creates clean water.

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During a biology class, Aria learned that the stage of respiration releasing most of the energy in glucose occurs in the

• nucleus

• chloroplast

• cytoplasm

• mitochondria

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During a science class, Luna and Olivia learned that together, respiration and photosynthesis keep the levels of carbon dioxide and oxygen in the atmosphere

• fairly constant

• constantly changing

• constantly increasing

• constantly decreasing

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During a school sports day, under which of the following conditions is lactic-acid fermentation most likely to occur?

• a very fast run

• a long walk

• sleeping

• playing video games

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Elijah is baking bread at home. In which of these does alcoholic fermentation occur?

• carbon dioxide

• lactic acid

• muscle cells

• yeast

Ava is conducting an experiment in her biology class. She wants to understand why water is important for a cell. What is the reason?

• Water is the main ingredient in DNA.

• All proteins are made of water.

• Most chemical reactions require water.

• Water is an essential organic compound for the body.

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Benjamin noticed that when he placed a raisin in a cup of water, it swelled up over time. Which term refers to the diffusion of water molecules through a selectively permeable membrane that caused this change?

• osmosis

• engulfing

• active transport

• concentration

James is baking a cake and notices that the batter rises quickly. This is because enzymes are important as they

• contain water

• speed up chemical reactions

• contain genetic material

• help the cell maintain its shape

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When Benjamin and Grace mix baking soda and vinegar in a science experiment, they form a (an)

• lipid

• atom

• element

• compound

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