Biology Unit 4 Quiz #1 Practice

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Autotroph

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An organism that makes its own food, like plants, through photosynthesis or chemosynthesis.

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Photosynthesis

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Process where Carbon is taken from the air by green plants, algae, and some bacteria. It makes glucose from sunlight, water, and carbon dioxide.

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Heterotroph

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An organism that gets energy by consuming other organisms for its energy and nutrition.

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Light Reactions

Back

First part of photosynthesis where light energy becomes chemical energy. This occurs in the thylakoid membranes of chloroplasts.

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Chloroplast

Back

Organelle in plant cells and some algae where photosynthesis takes place.

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Thylakoid

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A sac inside chloroplasts where light reactions occur.

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Granum

Back

A stack of thylakoid membranes in a chloroplast.

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Stroma

Back

Fluid in chloroplasts around the grana (thylakoid stacks), where the Calvin Cycle (light-independent reactions) happens.

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Pigment

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A molecule that absorbs light, giving color to plants.

Front

Chlorophyll

Back

Green pigment found in chloroplasts.