Question

Main function of amyloplast is: -
(a) Water absorption.
(b) Light absorption.
(c) Fat accumulation.
(d) Starch accumulation

Answer 1

Hint: An Amyloplast is an organelle present in animal cells.These amyloplast are commonly found in vegiative plants tissues such as tubers,buds etc.

Complete answer
Plastids are large double-membrane cytoplast mic organelles found in the cell of plants and algae. Plastids are the site of manufacture and storage of important chemical compounds used by cell. Amyloplast is a type of plastid, specifically a type of leucoplast, are found in roots and storage tissues and store and synthesize starch for the plant through the polymerization of glucose. Starch synthesis relies on the transportation of carbon from cytosol.
Plastids Develop from colourless precursors called proplastids. Plastid has three parts: green-chloroplast, non-green chromoplast and leucoplast. One type of leucoplasts is amyloplasts that store starch.
>Amyloplasts are the plastids that store and produce the starch within the internal compartment membranes.
>Its primary functions are the degradation and the synthesis of starch. It converts glucose into starch and stores it in the stroma.
>The note of starch synthesis in cereal grains is one of the factors affecting both grain size and field.
>Amyloplasts are thought to play a vital role in gravitation statoliths, a specialized starch accumulating >amyloplast are denser than cytoplasm and are able to settle to the bottom of the gravity sensing cells, triggering the asymmetrical distribution of auxin that causes the culture and growth of stems against the gravity vector.

Note:
> Starch synthesis and storage also takes place in chloroplasts involved in photosynthesis.
>Plastids have their own- DNA and Ribosomes.
>Red algae contain Chloroplasts.
>Chromoplast stored and synthesized pigments in the plants