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Photosynthesis & Plant Nutrition: Chloroplast Pigment Excitation & Light Reaction

school Instructor: Dr. Ananya Sharma (Botanical AI Specialist · Savitribai Phule Pune Univ.)

Lesson Progress 46% Completed

08m

LIVE AI LAB STREAM MSBSHSE Science · VII

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Chloroplast Thylakoid Electron Excitation

H₂O → 2H⁺ + 2e⁻ + ½O₂ | 680nm Photon Peak

light_mode Photon Strike Zone: Photosystem II

Chlorophyll-a pigments absorb photons at 680nm wavelength, ejecting electrons into the thylakoid chain.

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08:42 / 18:40

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AI Speech Sync (08:42) · 99.4% confidence

"...या थॅयलाकॉइड पटलिकांमध्ये असलेले क्लोरोफिल-ए (Chlorophyll-a) रेणू सूर्यप्रकाशातील निळा आणि लाल प्रकाश शोषून घेऊन उत्तेजित होतात..."

"...Within these thylakoid membranes, Chlorophyll-a molecules absorb blue and red photons, becoming electronically excited..."

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Chloroplast Internal Morphology (NEP 2020 Aligned)

Reference Fig. 4.3

Granum (ग्रेनम) Stack of thylakoid discs where light reactions synthesize ATP & NADPH.

Stroma (स्ट्रोमा) Colorless matrix where dark reaction (Calvin cycle) synthesizes glucose.

Chlorophyll pigments do not absorb green light; they reflect it, which is why leaves appear green. Photosynthesis is most intense under Blue (430 nm) and Red (660 nm) radiation.

Chapter 4 Syllabus 5 Lectures · 1 Assessment

+85 XP

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1. Intro to Autotrophic Nutrition

15 mins · Score: 100%

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PLAYING 46%

2. Chloroplast Pigment Excitation

18 mins · 08:42 timestamp

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3. Dark Reaction & Calvin Cycle

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4. Factors Affecting Rate (Temp & CO₂)

20 mins

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Chapter 4 AI Assessment

20 Questions · +40 XP

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Class 7 Mathematics: Linear Equations

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Cement Lecture 2 concepts (Chlorophyll spectrum & granum).

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Handouts & Formulas

MSBSHSE Ch4 Formula Sheet

1-Click bilingual Marathi + English PDF reference.

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