Light-harvesting complex

Definition

A light-harvesting complex (LHC) is a group of proteins and pigments in photosynthetic organisms that capture and transfer light energy to the reaction center during photosynthesis. It plays a crucial role in maximizing the efficiency of light absorption.

5 Must Know Facts For Your Next Test

1. Light-harvesting complexes are composed mainly of chlorophylls and carotenoids.
2. These complexes are located in the thylakoid membranes of chloroplasts.
3. LHCs increase the range of wavelengths that can be used for photosynthesis by capturing various light spectra.
4. Energy captured by LHCs is transferred to the reaction center where photochemical reactions occur.
5. The primary function of LHCs is to funnel energy towards Photosystem I and Photosystem II.

Review Questions

Related terms

Chlorophyll:

A green pigment found in plants, algae, and cyanobacteria that absorbs light for photosynthesis.

Photosystem I:

A protein complex involved in the light-dependent reactions of photosynthesis, primarily responsible for producing NADPH.

Thylakoid Membrane: The membrane-bound compartment inside chloroplasts where the light-dependent reactions of photosynthesis take place.