Question

These are colorless plastids
A. Chromoplasts
B. Chloroplasts
C. Elaioplasts
D. Leucoplasts

Answer 1

Hint: Plastids are double-membrane organelles that are found in the cells of algae and plants. They are responsible for the manufacturing and storing of food in plants. Plastids may contain pigments or are colorless. Pigments are used in the process of photosynthesis and there are different types of pigments that can change the color of the cell depending upon the pigment.

Complete answer:
Option A Chromoplasts: The primary function of chromoplasts is to provide distinctive colors to the plant parts. They lack chlorophyll and are non-photosynthetic pigments. They have carotenoids and are usually red, yellow and appear in flowers, fruits or the ageing leaves of plants.
So, option A is not correct.
Option B Chloroplasts: The part of plant and algal cells that carry out photosynthesis is called the Chloroplasts. These are green in color since they possess chlorophyll, which is vital for photosynthesis.
Hence option B is not correct.
Option C Elaioplasts: These are one of the three possible forms of leucoplasts. Synthesis and storage of fatty acids, terpenes, and other lipids are the main functions of Elaioplasts. Elaioplasts are non-pigmented organelles which have the ability to alternate between different forms of plastids.
Since they are non-pigmented, option C is correct.
Option D Leucoplasts: These are non-pigmented plastids whose main function is the storage of starch or oil. They are located in tissues of plants such as roots, bulbs and seeds.
Hence option D is also correct.

Hence both the options, C. Elaioplasts and D. Leucoplasts are correct.

Note:
The main reason for the different colors of chromoplasts is to attract pollinators. One other type of plastid is known as Gerontoplasts. They are basically chloroplasts which go with the ageing process. Leucoplasts are of three types: Amyloplasts, Proteinoplasts and Elaioplasts. The main function of leucoplasts is converting amino acids and fatty acids.