Photosynthesis | Light Reaction | Lec #2 | Biology Chapter 8 | 9th Class | New Book 2025

🌱 Photosynthesis | Light Reaction | Lecture #2 | Biology Chapter 8 | 9th Class | New Book 2025 Welcome to @MehransScience – the hub of simple and clear Biology lectures. In this lecture, we will explore the Light Reaction of Photosynthesis, the first phase where sunlight is converted into chemical energy. 📘 Based on 9th Class Biology – New Book 2025 (Chapter 8: Bioenergetics). ✨ In this lecture you will learn: Definition and importance of Photosynthesis Steps of the Light Reaction Role of chlorophyll and sunlight Formation of ATP & NADPH Production of Oxygen as a byproduct 📝 Most Important MCQs & Short Questions MCQs: Light reaction occurs in: a) Stroma b) Thylakoid membrane ✅ c) Cytoplasm d) Mitochondria Which pigment absorbs maximum light? a) Xanthophyll b) Carotene c) Chlorophyll-a ✅ d) Chlorophyll-b Which byproduct is released during the light reaction? a) CO₂ b) Oxygen ✅ c) Glucose d) ATP Short Questions: Define photosynthesis. Where does the light reaction take place? What are the products of the light reaction? Why is oxygen released during the light reaction? Differentiate between light and dark reactions. 📢 Stay Connected with Mehran’s Science: 📧 [email protected] 📱 Instagram: instagram.com/mehran.mukhtar 📘 Facebook: facebook.com/share/1J5tpZjBoS 💬 WhatsApp: wa.me/923067920503 #MehransScience #Biology #Class9 #Photosynthesis #LightReaction #Bioenergetics #newbook2025