Since NAD+NAD+ and NADP+NADP+ are essentially equivalent in their tendency to attract electrons, discuss how the two concentration ratios might be maintained inside cells at greatly differing values. Match the items in the left column to the appropriate blanks in the sentences on the right. ResetHelp substrate reduction less greater reduce oxidize substrate oxidation enzyme reduction enzyme oxidation Because NAD+NAD+-dependent enzymes usually act to Because {\rm NAD}^+-dependent enzymes usually act to blank substrates, an [{\rm NAD}^+]/[{\rm NADH}] ratio blank than unity tends to drive reactions in that direction. substrates, an [NAD+]/[NADH][NAD+]/[NADH] ratio Because {\rm NAD}^+-dependent enzymes usually act to blank substrates, an [{\rm NAD}^+]/[{\rm NADH}] ratio blank than unity tends to drive reactions in that direction. than unity tends to drive reactions in that direction.

Calculate the molarity of 48.0 ml of 6.00 m h2so4 diluted to 0.250 l .

Straightforward questions answered in the powerpoint slidesreaction: heating the starting materials under refluxwhat does it mean to heat under reflux? why do we choose water as the reflux solvent? what are boiling chips used for? why do we put a condenser on top of the reaction? why do we add heat and let the reaction stir for 30 minutes? why do we add sulfuric acid to the reaction after it cools as opposed to when it’s still hot? separation: filtration of precipitatewhy don’t we do an aqueous and organic extraction in the separatory funnel? why do you rinse the salicylic acid on the filter with ice cold water? purification: recrystallization of salicylic acid (no hot filtration needed)what is the difference in the amount of room temperature water vs. boiling water needed to dissolve the salicylic acid (assume a 1.2 gram yield of salicylic acid)? remember, in the lab if you need x ml of boiling water to dissolve a solid, then you should add a little more (definitely no more than 1.5 times the theoretical amount) to ensure it doesn’t recrystallize prematurely.analysis: melting point of salicylic acidwhat can you conclude if the melting point of the salicylic acid you just synthesized is 152-155oc and the 1: 1 mix of your product and “synthetic” salicylic acid is 151-154oc?

At 300 mm hg, a gas has a volume of 380 l, what is the volume at standard pressure