(a) Glucose can be converted to pyruvate during the process of glycolysis. What are the key enzymes involved in this process and how are these enzymes regulated? (9 marks) (b) The TCA cycle is an important regulator of carbohydrate metabolism, and mutations in this pathway can lead to various diseases. Please discuss two of these diseases and the enzymes or co-factor which is/are affected in this process and how? (6 marks) (c) Glycogen synthesis is an important process in regulating blood glucose levels. Identify the key regulatory enzymes involved in this process and explain how these enzymes are regulated by several factors within cells