Question

diagram and explain structure of chloroplast​

Answer 1

Answer:

The chloroplast is a structure which is surrounded by two unit membranes separated from one another by a space called periplastideal space. The heterogeneous nature of chloroplast is due to the presence of disc-like structures i.e., grana, in a colourless matrix called stroma. Grana are the sites for the light reaction and stroma is the site for the dark reaction of photosynthesis. Each granum is made up of a stock of closed compartment called thylakoids. Each thylakoid consists of two parallel membranes joined at their margins. The membranes of thylakoids contain the layer of particles called chlorophyll. In stroma, there are many membranes running parallel to each other throughout the length of chloroplast which is called lamellae. The stacks of thylakoids sacs are connected by stroma lamellae. Each chloroplast contains nearly 40-60 grana embedded in the stroma.

Answer 2

The chloroplast is a structure enclosed by two unit membranes separated by periplastideal space.

• The presence of disc-like structures, known as grana, amid a colourless matrix known as stroma gives chloroplast its heterogeneous aspect.
• The light reaction takes place at grana, whereas the dark reaction takes place at stroma.
• Each granum is made up of thylakoids, which are small closed compartments.
• Two parallel membranes are connected at their edges to form a thylakoid.
• The layer of particles termed chlorophyll is found in the membranes of thylakoids.
• The stroma has numerous membranes called lamellae that run parallel to one other throughout the length of the chloroplast.
• The thylakoids sac stacks are linked together by a network of thylakoids sacs.