Answer:
(c) Chloroplasts are present in green algae and
higher plants. They have a green pigment called chlorophyll and they are
involved in the photosynthesis of food. Therefore they are also known as the
'kitchens of the cells'. Each chloroplast is bounded by two unit membranes like
the mitochondria. It shows two distinct regions
(i) Grana are the main functional units of chloroplast.
They are stacks of membrane bounded, flattened discoid sacs (called thylakoids)
containing the molecules of chlorophyll.
(ii) Strorna is the homogeneous matrix in which grana are
embedded, it contains a large variety of photosynthetic enzymes, starch grains
DNA and ribosomes.
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