The Video lecture from Bioenergetics (F.Sc. First Year Biology) covers: Chemical reaction used in Photosynthesis and Respiration, the difference between Photosynthesis and Respiration, and the role of water in the process of Respiration. This video explains how water is the key component in the production of Oxygen as a product in photosynthesis. 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.