Dark Reaction | Lec #3 | Biology Chapter 8 | 9th Class | New Book 2025

🌱 Dark Reaction | Lecture #3 | Biology Chapter 8 | 9th Class | New Book 2025 Welcome to @MehransScience – your trusted channel for simple and clear Biology lectures. In this lecture, we will study the Dark Reaction of Photosynthesis (Calvin Cycle), where the energy captured in the light reaction is used to form glucose. 📘 Based on 9th Class Biology – New Book 2025 (Chapter 8: Bioenergetics). ✨ In this lecture you will learn: What is the Dark Reaction (Calvin Cycle) Role of ATP and NADPH in glucose formation Carbon dioxide fixation process Difference between Light & Dark Reaction Importance of the Calvin Cycle for plants and humans 📝 Most Important MCQs & Short Questions MCQs: Dark reaction of photosynthesis occurs in: a) Grana b) Thylakoid c) Stroma ✅ d) Cytoplasm Which enzyme is important for CO₂ fixation? a) ATPase b) RuBisCO ✅ c) NADP reductase d) Kinase The end product of the Calvin Cycle is: a) Oxygen b) Glucose ✅ c) ATP d) NADPH Short Questions: What is meant by the dark reaction? Where does the dark reaction take place? Which enzyme plays a key role in carbon fixation? Write two differences between light and dark reactions. What is the importance of the Calvin Cycle? 📢 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 #DarkReaction #CalvinCycle #Bioenergetics #NewBook2025