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Chapter 15: Q. 15.62 (page 538)
How do the unsaturated fatty acids in the phospholipids affect the structure of cell membranes?
As a result, lipoproteins in cell walls containing unsaturated fats are far more pliable or flowing than all those possessing saturated fat.
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The insect repellant DEET is an amide that can be made from the amidification of 3-methylbenzoic acid with diethylamine.
A 6.0 can of DEET repellant contains 25% DEET.
a. Draw the line angle formula of DEET.
b. Give the molecular formula of DEET.
c. What is the molar mass of DEET?
d. How many grams of DEET in one spray can?
e. Hoe many molecules of DEET in one spray can?
Identify the type of transport described by each of the following:
a. An ion moves from low to high concentration in the cell.
b. Carbon dioxide moves through a cell membrane.
For each of the following fatty acids, give the shorthand notation for the number of carbon atoms and double bonds, and classify as saturated, monounsaturated, or polyunsaturated:
a. linoleic acid
b. palmitic acid
c. myristic acid
d. oleic acid
The plastic known as PETE (Polytethylenetetraphathalate) is used to make plastic bottles and containers for shampoo and dishwashing agents. PETE is made of terephthalic acid and ethylene glycol liquids. Today PETE is the most widely recycled plastic. In one year 1.5*109 lb of PETE is recycled. After it is separated from other plastics, PETE can be used in polyester fabrics, door mats, and tennis ball containers. The density of PETE is 1.38 g/mL.
a. Draw the line angle formula for the center formed from one molecule of terephthalic acid and one molecule of ethylene glycol.
b. Draw the line angle formula for the product formed when a second molecule of ethylene glycol reacts with the enter you draw in part a.
c. How many kilograms of PETE is recycled in one year?
d. What volume, in liters of PETE is recycled in one year?
e. Suppose a landfill holds 2.7*107L of recycled PETE. If all the PETE that is recycled in one year were placed instead in landfills, how many would fir?
What are some sources of omega- and omega- -fatty acids (see Chemistry Link to Health "Omega-Fatty Acids in Fish Oils")?
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