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Chloroplast

Written by the Fiveable Content Team • Last updated August 2025
Written by the Fiveable Content Team • Last updated August 2025

Definition

Chloroplasts are organelles found in plant cells and algae responsible for photosynthesis. They convert light energy into chemical energy stored in glucose molecules.

AP course connection

Topic 8.3: 8.3 Using Light Energy to Make Organic Molecules

Unit 8

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Review this concept in 8.3 Using Light Energy to Make Organic MoleculesGeneral Biology I course hub

chloroplast cheat sheet for homework

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5 Must Know Facts For Your Next Test

  1. Chloroplasts contain the pigment chlorophyll, which absorbs light energy.
  2. The thylakoid membrane within chloroplasts is where the light-dependent reactions occur.
  3. Chloroplasts have their own DNA, indicating a symbiotic origin.
  4. The stroma is the fluid-filled space where the Calvin cycle (light-independent reactions) takes place.
  5. ATP and NADPH produced in the chloroplasts are essential for synthesizing glucose.

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