Which of the following do gut bacteria use for energy? Select all that apply. 

Your friend recently had some tests reveal that a mutation caused the hexokinase enzymes in her muscle cells to now have a higher Km in the presence of glucose.  Using the graph below: Which line represents hexokinase’s previous affinity for glucose? Which star represents hexokinase’s previous Km?   How would hexokinase have reacted to low and high amounts of glucose in this state?    Which line represents hexokinase’s mutated affinity for glucose? Which star represents hexokinase’s mutated Km?  How would hexokinase now react to low and high amounts of glucose with this mutation? Would this change be good or bad?   

Enzyme are largely regulated via covalent modification, allosteric regulation or induction. Which is the slowest method?

Enzyme are largely regulated via covalent modification, allosteric regulation or induction. Which is the slowest method?

(3-5 sentences). Why is the mitochondria called the cell’s “powerhouse”? Discuss some of its characteristics that make this possible. Be specific with examples. 

Which of the following do gut bacteria use for energy? Select all that apply. 

Which energy source do cells of the large intestine utilize the most?

Where would you expect peristalsis and segmentation to be least active when interacting with food?

Order the change in Gibbs free energy from the least likely to occur spontaneously to the most (1 = least, 5 = most). 

Which is NOT a component of the lipid bilayer?