Exam 3: Bioenergetics, Enzymes and Metabolism

After allowing the reaction to proceed, you find that the the final concentrations of each $\frac{[\mathrm{C}][\mathrm{D}]}{[\mathrm{A}][\mathrm{B}]}$ once equilibrium is achieved is $\frac{[0.35][0.35]}{[0.65][0.65]}$ Will the reaction proceed in a forward manner, namely with production of increased concentrations of products?

You isolate the enzyme that synthesizes folic acid in bacteria and conduct some enzyme kinetics experiments. You find, not surprisingly, that sulfa drugs inhibit the enzyme's activity. What happens to the V_max and K_M of this enzyme when it is treated with sulfa drugs? (Select all the correct statements relating to this experiment)

Energy rich monosaccharides and other biological monomers which are seen to exist stably in purified form are said to be:

What is an essential difference between thermodynamics and bioenergetics?

What is the effect of a competitive inhibitor on an enzyme-mediated reaction?

The chemical energy stored in ATP is converted to mechanical energy that can move organelles around within the cell. This is an example of __________.

In glycolysis, fructose 1,6-biphosphate is split into two different molecules with distinct structures. Which enzyme is responsible for converting one of those molecules to be the same as the other?

Evidence suggests that lower levels of insulin in the blood may be important in promoting longevity. Which animal models have been used to gather this evidence? (Select all that apply)

What is the effect of a competitive inhibitor on an enzyme-mediated reaction?

Which property below is NOT a characteristic of enzymes?

Although the glycolytic pathway is considered catabolic in purpose, some of the reactions within the pathway could be considered anabolic. Select the enzyme in glycolysis which catalyses an anabolic reaction.

You are observing a reaction and discover that the reaction vessel is warm to the touch. The reaction also results in an increase in entropy. Which statement correctly confirms whether or not the reaction is spontaneous and explains why?

Using an imaging technique such as positron emission tomography (PET)to detect cancer has all the advantages described EXCEPT:

You are studying metabolic pathways and discover that two pathways intersect so that the enzyme basinase participates in both of the intersecting pathways, in one case using substrate K and in the other using substrate M. When presented with substrate K in amounts significantly larger than M, basinase converts K to L which leads eventually to the production of the end product R. The activity of the second pathway is depressed simultaneously. In the presence of large amounts of substrate M and lower amounts of substrate K, the second pathway is activated and culminates in the production of that pathway's end product Y. The activity of the first pathway is depressed simultaneously. What are the alternative substrates K and M acting like?

If you were comparing circadian oscillator structures between plant species, where might you predict that there would be the greatest differences?

In the absence of an enzyme, a monosaccharide like galactose or glucose, will likely decompose in roughly ___________.

2-[¹⁸F] fluoro-2-deoxy-D-glucose (FDG)accumulates within tumor cells engaging in higher than normal glycolytic activity. Which reactive functional group is missing in FDG, permitting its accumulation in tumor cells and their detection through PET scans?

What kind of interaction is NOT involved in the binding of a substrate to a normally functioning enzyme?

In the reaction A + B <-> C + D, how might the reaction take place in the cell if the $\Delta$ G is very positive?

If people are kept on diets containing about 25% fewer calories than would be required to maintain their initial body weight, what happens? (Select all correct responses)