What is the relationship between stroma and grana?
Grana are the stacks of thylakoids where light reaction of photosynthesis takes place. Stroma is the jell-like matrix of the chloroplast, which contains the enzymes for dark reaction of photosynthesis. The main difference between grana and stroma is their structure and function.
How are thylakoids grana and stroma related?
Thylakoids are usually arranged in stacks (grana) and contain the photosynthetic pigment (chlorophyll). The grana are connected to other stacks by simple membranes (lamellae) within the stroma, the fluid proteinaceous portion containing the enzymes essential for the photosynthetic dark reaction, or Calvin cycle.
What is the function of grana and stroma?
The grana of chloroplast consists of pigment system made up of chlorophyll-a, chlorophyll-b, carotine and xanthophyll while the stroma contains relevant enzymes required for photosynthesis as well as DNA, RNA and cytochrome system.
What are the two stages of photosynthesis discuss these two stages and how they are related?
Photosynthesis takes place in two stages: light-dependent reactions and the Calvin cycle. Light-dependent reactions, which take place in the thylakoid membrane, use light energy to make ATP and NADPH. The Calvin cycle, which takes place in the stroma, uses energy derived from these compounds to make GA3P from CO2.
What connects the grana of chloroplast with each other?
function in chloroplasts Grana are connected by stromal lamellae, extensions that run from one granum, through the stroma, into a neighbouring granum.
What is the difference between stroma and grana?
Stroma is the homogenous matrix present within the membrane of chloroplast. Grana is the disc-like plates embedded in the stroma of the chloroplast. Grana are connected to each other by intergranal lamellae.
How are chlorophyll chloroplast grana thylakoids and stroma related to each other?
Lesson Summary The chloroplast contains chlorophyll within its thylakoids, which absorbs light energy and gives chloroplasts its green color. Stacks of thylakoids are known as grana, which exist in the open space of the chloroplast known as the stroma.
What is the function of the stroma thylakoid and granum?
Stromal thylakoids join two grana in their lower part of the thylakoid stacks. Grana are the photosynthetic factories in a plant cell. The thylakoid membrane present in a granum is the site where light reactions of photosynthesis occur.
What is the differences between stroma and grana?
What are the structural peculiarities of grana and stroma?
How do ATP and NADPH connect light-dependent and light-independent reactions in photosynthesis?
The light-dependent reactions convert light energy into chemical energy. The goal of the light-dependent reactions of photosynthesis is to collect energy from the sun and break down water molecules to produce ATP and NADPH. These two energy-storing molecules are then used in the light-independent reactions.
Which parts of photosynthesis occur in the stroma of the chloroplast?
Note that the dark reaction takes place in the stroma (the aqueous fluid surrounding the stacks of thylakoids) and in the cytoplasm. Once the light reactions have occurred, the light-independent or “dark” reactions take place in the chloroplast stroma.
What is the difference between Grana and stroma?
The main difference between grana and stroma is that grana are the disk-like plates embedded in the stroma whereas stroma is the homogeneous, jell-like matrix of the chloroplast. Grana are connected to each other by intergranal lamellae.
What is the function of Stroma lamellae in grana?
Some of the thylakoids of a granum are connected with thylakoids of another granum via a thin membrane called stroma lamellae or fret membrane. Grana provide a large surface for the attachment of Chlorophylls, other photosynthetic pigments, electron carriers and enzymes to perform light dependent reaction of the photosynthesis.
What is the function of Grana and stromal fluid?
The grana are surrounded by the stromal fluid so that products of the light dependent reaction can rapidly pass into the stroma via granal membranes. Stroma is indicated by light green color.
What is the structure of Grana?
Grana: Each granum consists of 5-25 disc-shaped thylakoids stacked one on the other resembling a stack of coins. Stroma: Fluid-filled matrix containing DNA, ribosomes, enzymes, oil droplets and starch grains.