Light-Dependent Reaction – Photosynthesis Ep 1

Photosynthesis is the process used by plants and other photosynthetic organisms to make their own glucose. The glucose can then go on to be used in respiration, stored as starch, or used in other reactions. Photosynthesis requires light energy, but it is actually only the first stage which is light-dependent. We will focus on the... Continue Reading →

Osmosis – Exchange and Transport Ep 3

Osmosis is all about the movement of water. Specifically, it is the diffusion of free water molecules from an area of high water potential to an area of low water potential across a partially permeable membrane. As we saw in diffusion, the water molecules move both ways, but the overall net movement is down the... Continue Reading →

Water – Biological Molecules Ep 6

Water is extremely important to living organisms. Not only is it needed internally, but also externally as part of the environment - some organisms live in it. It is also a reactant in photosynthesis, so contributes to the oxygen in the atmosphere. In short, water is essential for life as we know it. Structure of... Continue Reading →

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