Thylakoids are tiny compartments found inside of chloroplasts. Their role is to help absorb sunlight in order for photosynthesis to occur. They contain all of the chlorophyll that the plant has which, in turn, allows for the absorption of sunlight. This is why the thylakoid is the site of the light dependent portion of photosynthesis, which is the portion that requires sunlight.

Thylakoids are membrane-bound compartments inside chloroplasts and cyanobacteria. They are the site of the light-dependent reactions of photosynthesis. Thylakoids consist of a thylakoid membrane surrounding a thylakoid lumen. Chloroplast thylakoids frequently form stacks of disks referred to as grana.

Lamellae of chloroplast are known as thylakoids.

Thylakoids are the structural components of chloroplasts, the organelles responsible for photosynthesis in plants and some algae. These flattened, membranous sacs are arranged in stacks called grana and are connected by the stroma lamellae, which are also known as lamellae of chloroplasts.

Structure of Thylakoids:
Thylakoids are composed of a phospholipid bilayer embedded with various pigments, proteins, and enzymes essential for photosynthesis. They are stacked on top of one another to form grana, which are interconnected by stroma lamellae. The thylakoid membrane contains numerous proteins and pigment molecules, such as chlorophyll, that capture light energy and convert it into chemical energy.

Function of Thylakoids:
Thylakoids play a crucial role in the light-dependent reactions of photosynthesis. These reactions occur on the thylakoid membrane and involve the absorption of light energy by chlorophyll and other pigments. The energy is then used to generate ATP (adenosine triphosphate) and NADPH (nicotinamide adenine dinucleotide phosphate), which are molecules that provide the necessary energy and reducing power for the subsequent dark reactions of photosynthesis.

The thylakoid membrane also houses the photosystems, which are protein complexes responsible for capturing and converting light energy into chemical energy. Photosystem II (PSII) and photosystem I (PSI) work together to transfer electrons and generate ATP and NADPH.

Arrangement of Thylakoids:
Thylakoids are arranged in a highly organized manner within the chloroplast. They form stacks called grana, which are connected by stroma lamellae. This arrangement allows for efficient light capture and energy transfer during photosynthesis. The grana provide a large surface area for the absorption of light, while the stroma lamellae ensure that the products of the light-dependent reactions are efficiently transported to the dark reactions, which occur in the stroma of the chloroplast.

Conclusion:
In conclusion, the lamellae of chloroplasts are known as thylakoids. Thylakoids are the structural components of chloroplasts that contain the pigments and proteins necessary for capturing light energy and carrying out the light-dependent reactions of photosynthesis. The arrangement of thylakoids in grana and stroma lamellae allows for efficient light capture and energy transfer within the chloroplast.