Q1. The ATP/ADP ratio in the actively respiring yeast cell is about 10. What must the intracellular 3-phosphoglycerate/1, 3-diphosphoglycerate ratio be to make the phosphoglycerate kinase reaction thermodynamically favourable in the direction of 1, 3-diphosphoglycerate synthesis?

Q2. There is another digestive enzyme other than salivary amylast that is secreted by the salivary glands. What is the enzyme? What substrate does it act on? Where in body dies it become activated and why?