Draw a labeled diagram of the chloroplast and explain its structure

CBSE Class 11
1

Draw a labeled diagram of the chloroplast and explain its structure.

2

Chloroplasts are oval, spherical, disc-shaped or ribbon-shaped.
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  • They are 5-10 mm in length and 2-4 mm in width.
  • It is a double-membraned organelle.
  • The space enclosed by the inner membrane is filled with a semi-solid substance called stroma.
  • Flattened, membranous sacks called thylakoids are present in the stroma.
  • The stroma contains several enzymes required for protein and carbohydrate synthesis, DNA, ribosomes and RNA.
  • The thylakoids are arranged like stacks of coins. These stacks are called grana.
  • Flat membranous tubules called stroma lamellae connect the thylakoids.
  • The thylakoids contain space within them called a lumen.