The Video lecture from Bioenergetics (F.Sc. First Year Biology) covers: The role of Light and Carbon dioxide in photosynthesis. Also different concepts like Absorption spectrum, Action Spectrum, Biorhythmic Clock and Opening and Closing of stomata are discussed in this topic. Find more e-learning material and educational video lectures in Urdu at maktab.pk. These videos are free to use for promotional and commercial purpose by keeping the credits to Maktab.