Exam 2: The Chemistry of the Cell

Describe how the amphipathic nature of phospholipids leads to the formation of the phospholipid bilayer organization observed in membrane structure.Based upon this information,how would you design a drug delivery system to cross the cell membrane?

The polymerization of different types of macromolecules is similar in many respects.Which of the following principles below is least likely to be common to all methods of polymerization of macromolecules?

Which of the following molecules is involved with assisted assembly?

Which of the following is not soluble in water?

Because membranes usually are not permeable to polysaccharides,nucleic acids,and proteins,how are cells able to incorporate these molecules?

The moon lacks life and varies dramatically in temperature.If we could keep a layer of water spread on the surface of the moon,what effect would it have?

Why is a selectively permeable membrane so important to living things?

Which of the following is not an activated monomer?

The ________ of water is caused by the unequal sharing of electrons between oxygen and hydrogen atoms.

Water has many unique properties.Can you identify the property of water that is responsible for each of the following observations? a.Many insects,such as the water strider,are able to move across the surface of water. b.Most people get chilled immediately after taking a shower. c.A dime can be made to "float" on the surface of a glass of water. d.The dime will sink if salt is added to the water. e.On cold days,the water temperature is often warmer than the surrounding air. f.Ice forms on the surface of lakes and rivers. g.Many salts dissolve in water. h.Many oils will not dissolve in water. i.The coastal areas of the world have a climate that is more moderate than inland areas. j.Some springs contain high amounts of arsenic. k.The Great Salt Lake contains high quantities of mineral solutes.

Which of the following structures will self-assemble?

While synthesizing a new blue pigment,a chemist notices that the new compound congregates between an aqueous (water)environment and a hydrophobic environment.When added to a mixture of oil and water,the pigment creates a blue ring around the droplets of oil.Which of the following statements best describes this new pigment?

As a protein is being synthesized,the correct folding of the protein is aided by the movement of nonpolar amino acids toward the inner areas of the protein.How can this phenomenon be explained?

________ and ________ groups are negatively charged functional groups of carbon,whereas the ________ group is a positively charged functional group.

Biologically,which of the following is the least important characteristic of water?

The purpose of reducing and oxidizing agents in denaturation and renaturation is the breaking and reforming of the ________ bond.

Detergents are best able to dissolve oil from fabric or dishes during washing because

Self-assembly has been utilized or potentially may be used for all of the following applications except

Which of the following is a unit of energy?

Which of the following is not a possible noncovalent interaction?