Properly wrapped, salted butter will keep in the freezer for up to one year. After this, it may begin to lose the fresh butter flavour and pick up other odours or flavours from the freezer. Unsalted butter will keep in the freezer for up to three months. Stay Connected.
Light-independent reactions take place in plant chloroplasts. In this process sugars are made from carbon dioxide. The process, known as the Calvin cycle, uses products of the light-dependent reactions (ATP and NADPH) and various enzymes.
ATP is further converted into ADP + Pi, which is reverted back to ATP during the light-independent reactions. The Calvin cycle takes place in the stroma of the chloroplasts. Three main processes take place: carbon dioxide fixation, carbon dioxide reduction and ribulose biphosphate regeneration.