Read the following passage and answer the questions given below. Plastids are cell organelles present only in plant cells. These are of two types-colourless plastids and coloured plastids. Leucoplasts are colorless plastids. Chromoplasts provide colour to various flowers and fruits. Chloroplasts are special type of coloured plastids. They contain a green pigment
Answers
Answer:
Plastid is a membrane-bound organelle found in the cell of plants, algae and few eukaryotic cells.
It the site of production and storage of important chemical compounds which are used by the cells of autotrophic organisms.
They contain pigments which are used in photosynthesis and the types of pigments determine the cell's colour.
The types of plastids are-
1) Chloroplasts:- are the green plastids which contain chlorophyll pigments for photosynthesis.
2) Chromoplasts:- are the coloured plastids for pigment synthesis and storage.
The pigment present in them is carotene which gives a different colour to fruits and flowers.
3) Gerontoplasts:- are the chloroplasts that are going through the ageing process.
These are present in the leaves in which no more photosynthesis occurs (such as in the fall months).
4) Leucoplasts: are the colourless plastids for monoterpene synthesis found in non- photosynthetic parts of the plants.
They are of three types:-
a) Amyloplasts- stores starch.
b) Proteinoplasts- stores proteins.
c) Elaioplasts- stores fats and oils
Explanation: