Photosynthetic cells contain chlorophyll and other light-sensitive pigments that capture solar energy. In the presence of carbon dioxide, such cells are able to convert this solar energy into energy-rich organic molecules, such as glucose.
Yes, you can add a little lemon juice or vinegar to the goat's milk to make it into a buttermilk or kefir. This will lower the pH of the milk, and allow it to release the CO2 stored in the sodium bicarbonate (baking soda), causing the bread to rise. Goat's milk generally has less fat and more vitamins.
1 Sour cream can be made with the same procedure as buttermilk, using one cup of cream mixed thoroughly with 2 tbsp fresh active buttermilk and letting it sit for 12-24 hours at room temperature. 2  The higher butterfat in the cream, the thicker the finished sour cream.