Photosynthesis: A Closer Look BSCS Ch 8

What can plants, algae, and some eubacteria do that humans and other animals cannot?

• Live without oxygen

• Fly

• Breathe underwater

• Synthesize food from sunlight and air

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Where do the reactions of photosynthesis take place?

• In the mitochondria

• In the ribosomes

• In the nucleus

• In the chloroplasts

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What is the role of chlorophyll in photosynthesis?

• It releases oxygen

• It absorbs carbon dioxide

• It absorbs light energy

• It synthesizes ATP

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What is a by-product of photosynthesis?

• Sulfur dioxide

• Nitrogen

• Oxygen gas

• Carbon dioxide

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What is the first phase of photosynthesis responsible for producing?

• Lipids

• Oxygen gas, ATP, and loaded electron shuttles

• Proteins

• Carbohydrates

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What process converts the energy in ATP and electron shuttles into long-term energy storage?

• Cellular respiration

• The second phase of photosynthesis

• Osmosis

• Fermentation

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How is carbon dioxide used in photosynthesis?

• It is fixed into carbohydrates

• It is converted into oxygen

• It is expelled as a waste product

• It is stored in the chloroplasts

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What is the fate of the 3-carbon sugars produced during carbon fixation?

• They are used to produce chlorophyll

• They are converted directly into ATP

• They are expelled as waste

• They are rearranged into a variety of other sugars

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Why are plants considered producers?

• They consume more carbon dioxide than they produce

• They produce oxygen only

• They produce their own food and food for other organisms

• They produce ATP through cellular respiration only

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What is the significance of sucrose in plants?

• It is a waste product of photosynthesis

• It is toxic to plant cells

• It is transported to provide fuel to distant tissues

• It is only used as a structural component

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