#Question id: 527
#Unit 1. Molecules and their Interaction Relevant to Biology
What chemical species activates the GLUT4 protein to transport glucose into cells?
#Question id: 528
#Unit 1. Molecules and their Interaction Relevant to Biology
Once inside a cell, glucose is rapidly phosphorylated to glucose-6-phosphate. What is the main purpose of this phosphorylation?
#Question id: 529
#Unit 1. Molecules and their Interaction Relevant to Biology
When a muscle is stimulated to contract aerobically, less lactic acid is formed than when it contracts anaerobically because:
#Question id: 531
#Unit 1. Molecules and their Interaction Relevant to Biology
Glucose labeled with 14C in C-1 and C-6 gives rise in glycolysis to pyruvate labeled in:
#Question id: 532
#Unit 1. Molecules and their Interaction Relevant to Biology
In glycolysis, fructose 1,6-bisphosphate is converted to two products with a standard free-energy change (DG'°) of 23.8 kJ/mol. Under what conditions (encountered in a normal cell) will the free-energy change (DG) be negative, enabling the reaction to proceed to the right?
#Question id: 533
#Unit 1. Molecules and their Interaction Relevant to Biology
Glucose, labeled with 14C in different carbon atoms, is added to a crude extract of a tissue rich in the enzymes of the pentose phosphate pathway. The most rapid production of 14CO2 will occur when the glucose is labeled in: