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The four beakers below illustrate cells placed in different solutions. The concentration of solutes in the cells and the surrounding solution is indicated for each treatment. Assume that water CAN pass across the cell membrane but the solutes CAN NOT. Use this information to answer this question as well as the next one. Which cell(s) will lose weight? Screen Shot 2020-08-14 at 9.04.44 AM.png

Refer to the following figure for this question as well as the next one. Compare the reaction labeled “A” with the reaction labeled “B”. Which of the following statement is true concerning those two reactions? Screen Shot 2020-08-14 at 9.06.09 AM.png

STOP!  Do not proceed until you are ready to take this exam.  You will have 70 minutes to complete this exam.

Lipitor is a drug that binds to the active site of the HMG-CoA enzyme thus reducing the amount of cholesterol synthesized in the liver. In general, by what mechanism does Lipitor work?

What is the atomic number of this element (assume it has a charge of -1)? Screen Shot 2021-09-14 at 9.47.03 PM.png

The following image shows that Polypeptide A and Polypeptide B, which have different primary sequences, associate with each other to form Protein X.  Which of the structures in the figure has quaternary structure? Screen Shot 2022-09-12 at 9.20.04 PM.png 

If one strand of a DNA molecule has the sequence of bases 5’-ATTCGA-3’, the complimentary strand would have the sequence

A gene contains the following sequence of DNA bases: 3’ TAACCGCAT 5’

Which beaker(s) from the previous image contains a cell that is hypertonic compared to its surrounding solution?

Climate refugees will be people that are escaping the impacts of climate change. Sea level rise is an example of why people may need to move.