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What is the function of the thylakoid membrane?


What is the function of the thylakoid membrane?

Introduction. Thylakoids are the internal membranes of chloroplasts and cyanobacteria, and provide the platform for the light reactions of photosynthesis.

What is the thylakoid membrane called?

Different grana are linked by regions of thylakoid membrane called stroma lamellae. The thylakoid membranes separate the thylakoid space from the stroma space.

What do thylakoid membranes contain?

The thylakoid membranes contain chlorophyll and other pigments arranged in antenna arrays to capture light energy for two photosystems called Photosystem I and Photosystem II.

What does the thylakoid membrane do in photosynthesis?

A thylakoid is a sheet-like membrane-bound structure that is the site of the light-dependent photosynthesis reactions in chloroplasts and cyanobacteria. It is the site that contains the chlorophyll used to absorb light and use it for biochemical reactions.

What is thylakoid space?

The space inside the thylakoid membranes is called the thylakoid space. Each stack of thylakoids is called a granum (plural = grana). The fluid enclosed by the inner membrane that surrounds the grana is called the stroma.

Why is the thylakoid membrane folded?

Photosynthetic thylakoid membranes in plants contain highly folded membrane layers enriched in photosystem II, which uses light energy to oxidize water and produce oxygen. The sunlight also causes quantitative phosphorylation of major photosystem II proteins.

Is thylakoid membrane double or single?

The thylakoid membrane encloses a single, continuous aqueous compartment called the thylakoid lumen. These are the sites of light absorption and ATP synthesis, and contain many proteins, including those involved in the electron transport chain.

Why thylakoids are stacked together?

When stacked, each thylakoid is able to increase their total surface area which allows more electron transport chains to be embedded into each thylakoid membrane.

Does thylakoid have double membrane?

Plant chloroplasts are large organelles (5 to 10 μm long) that, like mitochondria, are bounded by a double membrane called the chloroplast envelope (Figure 10.13). The thylakoid membrane forms a network of flattened discs called thylakoids, which are frequently arranged in stacks called grana.

How are chlorophyll molecules attached to thylakoid membranes?

The chlorophyll molecules are grouped into antenna complexes, clusters of several hundred molecules that are anchored onto the thylakoid membrane by special proteins. Within each antenna complex is a specialized set of proteins and chlorophyll molecules that form a reaction…

Is thylakoid a space?

The thylakoid space is the space on the inside of the thylakoid. A thylakoid is membrane-bound disc in the chloroplast of plant cells.

What does a thylakoid look like?

Thylakoids are membrane-bound structures embedded in the chloroplast stroma. A stack of thylakoids is called a granum and resembles a stack of coins.