Final answer:
Glycogen Synthesis is not active during fasting conditions; instead, the body activates energy-releasing pathways like Ketogenesis, Gluconeogenesis, Lipolysis, and Beta Oxidation to maintain blood glucose levels and supply energy.
Step-by-step explanation:
The pathway that is not likely active under fasting conditions is d) Glycogen Synthesis. During fasting, the body shifts its energy metabolism from using glucose as a primary fuel source to breaking down stored fuels in order to maintain blood glucose levels and supply energy to the body. Ketogenesis is activated to produce ketone bodies from acetyl CoA as an alternative energy source for the brain and other tissues.
Gluconeogenesis is the synthesis of new glucose molecules mainly from non-carbohydrate substrates to supply glucose to critical organs like the brain when glycogen stores are low. Lipolysis is the breakdown of triglycerides into free fatty acids for energy. Beta Oxidation of fatty acids produces acetyl CoA, which is then used to generate ATP or to form ketone bodies. However, Glycogen Synthesis, which would be building up glycogen stores, is not activated under fasting conditions, as the body is not in a state to store energy but rather to mobilize stored energy.