Author: Anonymous

By the time carbohydrates have passed through the stomach an…

By the time carbohydrates have passed through the stomach and intestines, they have been broken down into single sugars such as glucose.  At the same time fats that pass through the stomach and intestines have been broken down into fatty acids.  The image below shows various examples of fatty acids.  Briefly describe why glucose can diffuse directly into the blood and fatty acids cannot.     

Carbon tetrachloride, CCl4, used to be a primary component i…

Carbon tetrachloride, CCl4, used to be a primary component in fire extinguishers but was phased out due to toxicity upon prolonged exposure.  The chlorine atoms in the CCl4 molecule form [bonds] bonds with the carbon and each chlorine has [LP] lone pairs of electrons.  The overall molecule has a [shape] geometry.

The enzyme HIV protease is responsible for activating protei…

The enzyme HIV protease is responsible for activating proteins expressed by the Human Immunodifficiency Virus (HIV) which then attack the host immune system.  This protein has been the target of highly successful drug development in order to block HIV activity.  The image below shows a close-up of the active site of HIV protease bound to one of these drugs, showing specific intermolecular interactions.  The atoms making the interactions are labeled.  Match each interaction to its correct type.    

The three most common forms of chocolate in the United State…

The three most common forms of chocolate in the United States are Dark Chocolate, Milk Chocolate and White Chocolate.  The following image shows the active ingredients in each of these types of chocolate.  Which of these active ingredients represents the nonpolar molecule?