Question

Which of the cell organelle contains chlorophyll?
A. Cell Wall
B. Cytoplasm
C. Chloroplast
D. Vacuoles

Answer 1

Hint: Chlorophylls are the green coloured pigments which are responsible for the green colour in plants. They are the magnesium porphyrin compounds. Porphyrin ring consists of four pyrrole rings. These compounds also take place in the preparation of food by the plants.

Complete answer:
Generally $5 - 10\% $ chlorophyll is present in chloroplasts. The two major types of chlorophyll are Chlorophyll – a and chlorophyll – b. Chlorophyll molecules have an Mg-porphyrin head and phytol tail. The head of the compound is known to be hydrophilic and the phytol tail is lipophilic or hydrophobic. Chl-a is a universal pigment that is present in ${O_2}$ releasing photosynthetic organisms. Chlorophyll-a is present in bright or blue-green colour while chlorophyll b is found in yellow-green or grass green color. During photosynthesis by plants, the absorption of photons or light is done by the chlorophyll molecule. This pigmented molecule uses light energy for the synthesis of carbohydrates by using $C{O_2}$ and water molecules. Chlorophyll works as an effective photoreceptor in the process of photosynthesis. There carry many alternative signals along with double bonds. Without chlorophyll, the plants would fail to absorb the sunlight and hence, there would be no photosynthesis. In the electromagnetic spectrum, it is observed that the absorption of light is more intensely done at the blue portion and the red portion.

Therefore the correct option is (C) Chloroplast.

Note:
The chloroplasts also contain fat-soluble carotenoid pigments such as carotene and Xanthophyll along with chlorophyll where carotene and chlorophyll are responsible for trapping light energy. The majority of chloroplasts of green plants are found in the mesophyll cells of the leaves.