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Q-7041
1 Mark
MSBSHSE Class 7
In green plants, the light reactions of photosynthesis take place in which part of the chloroplast?
हरितलवकातील कोणत्या भागात प्रकाश रासायनिक अभिक्रिया घडून येते?
✓ A. Granum (ग्रेनम)
B. Stroma (स्ट्रोमा)
C. Outer Membrane
D. Cytoplasm
Pedagogical Solution: Light reactions require chlorophyll pigments located within the thylakoid membranes of the granum to absorb photons and photolyze water.
Q-7042
2 Marks
MSBSHSE Class 7
Which pigment is primarily responsible for absorbing blue and red spectrum photons during photosynthesis?
सूर्यप्रकाशातील निळा आणि लाल रंग शोषून घेण्यासाठी प्रामुख्याने कोणते रंगद्रव्य जबाबदार असते?
A. Carotenoid
✓ B. Chlorophyll-a
C. Anthocyanin
D. Xanthophyll
Pedagogical Solution: Chlorophyll-a absorbs light at 430nm (blue) and 680nm (red) wavelengths, driving photosystem II electron excitation.