This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Biochemistry
Compound that joins glycolysis with glycogenesis and glycogenolysis is 
Select and explain. 
A. Glucose 1,6 biphosphate, B. Glucose-1-phosphate, C. Glucose-6-phosphate, D. Fructose 1,6 biphosphate
C: Glucose-6-phosphate
Answer: C: Glucose-6-phosphate 
Explanation: Glucose-6-phosphate is an important compound that joins several metabolic pathways viz. glycolysis, glycogenolysis, glycogenesis, gluconeogenesis and pentose phosphate pathway.