Question:
Chlorophyll is present in
Chlorophyll is present in
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Light reactions and chlorophyll pigments occur in Grana (thylakoids); Dark reactions (Calvin cycle) occur in Stroma.
Updated On: Sep 15, 2026
- The grana of chloroplast
- The surface of chloroplast
- The dispersed form throughout the chloroplast
- The stroma of chloroplast
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The Correct Option is A
Solution and Explanation
Step 1: Understanding the Concept:
The photosynthetic apparatus is compartmentalized within chloroplast sub-organellar ultrastructures.
Step 2: Detailed Explanation:
Chlorophyll $a$, chlorophyll $b$, and accessory carotenoid pigments are embedded within the lipid bilayer of thylakoid membranes, which stack together to form grana (granum thylakoids).
The stroma is the fluid matrix containing soluble Calvin cycle enzymes (e.g., RuBisCO) and circular DNA, but lacks chlorophyll pigments.
Step 3: Final Answer:
Therefore, chlorophyll is present in the grana of the chloroplast.
The photosynthetic apparatus is compartmentalized within chloroplast sub-organellar ultrastructures.
Step 2: Detailed Explanation:
Chlorophyll $a$, chlorophyll $b$, and accessory carotenoid pigments are embedded within the lipid bilayer of thylakoid membranes, which stack together to form grana (granum thylakoids).
The stroma is the fluid matrix containing soluble Calvin cycle enzymes (e.g., RuBisCO) and circular DNA, but lacks chlorophyll pigments.
Step 3: Final Answer:
Therefore, chlorophyll is present in the grana of the chloroplast.
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