Question

Grass looks green and papaya appear yellow. Which is the cell organelle responding for this? Write the struural feature of this organelles?

Answer 1

Grass looks green as due to the presence of a plastid called chloroplast and papaya appears yellow because due to the presence of the plastid chromoplast. The cell organelle responding to this is plastids . the structural feature is that ;
-It contains of numerous membrane layers, embeded (present) in the material called stoma.
-It has 2 membrane layers same as mitochondria.
-It has its own DNA and Rhibosomes.
-There are 3 types of plastids :
   CHLOROPLAST- gives green colour , contains chlorophyll and helps in photosynthesis.
   LEUCOPLAST- colourless plastid and stores material like starch, oil and protiens .
   CHROMOPLAST- coloured plastids and provide colour to different parts.

Answer 2

Answer:

The green color of grass is due to the pigment called Chlorophyll found in Chromoplast. The presence of carotenoid pigments present in the Chromoplast plays a significant role in determining the color of papaya fruit flesh.

Explanation:

• The porphyrin ring, a nitrogen-containing structure that surrounds the core magnesium atom in the chlorophyll molecule, is joined to the ring by a lengthy carbon-hydrogen side chain known as the phytol chain. Variations result from slight changes to a few side groups.
• Typically, the 40-carbon backbone of carotenoids is made up of eight isoprene molecules.
• By modifying the isoprenoid backbone by cyclization of end groups and oxidation, carotenoids are differentiated and create various pigments.

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