Open Question
Which of the following substances is a major component of the cell membrane of a fungus?a. celluloseb. chitinc. cholesterold. phospholipids
2. Cell Chemistry & Cell Components
Lipids
Back2. Cell Chemistry & Cell Components
Lipids
- Multiple Choice
Which type of fatty acids only contain Carbon-Carbon single bonds?
a) Unsaturated.
b) Saturated.
c) Trans fats.
d) Steroids.
- Multiple Choice
A triglyceride is a form of _______ composed of ___________.
a) Lipid ; fatty acids & Glucose.
b) Lipid ; Fatty acids & Glycerol.
c) Carbohydrate ; Fatty acids only.
d) Lipid ; Ribose.
- Multiple Choice
How do phospholipids interact with water molecules?
a) The polar heads avoid water; the nonpolar tails attract water (because water is polar and opposites attract).
b) Phospholipids do not interact with water because water is polar and lipids are nonpolar.
c) The polar heads interact with water; the nonpolar tails do not.
d) Phospholipids dissolve in water.
- Multiple Choice
The molecule shown the figure is a ________.
a) Fatty acid.
b) Wax.
c) Steroid.
d) Triacylglycerol.
e) Phospholipid.
- Multiple Choice
Choose the correct statement about biological waxes:
a) They contain at least one steroid molecule.
b) They are fatty acids bound to long chain alcohol molecules.
c) They are extremely hydrophilic.
d) They are made of 4 fused carbon ring molecules.
- Multiple ChoiceWhich of the following is a true statement comparing phospholipids and triacylglycerols (fats and oils)?
- Multiple ChoiceLipids differ from other large biological molecules in that they __________.
- Multiple ChoiceWhich of the following terms can be correctly used to describe compounds that do not mix with water?
- Multiple ChoiceNutritionally, saturated triacylglycerols are considered to be less healthful than unsaturated triacylglycerols. What is the difference between them?
- Multiple ChoiceThe lipids that form the main structural component of cell membranes are __________.
- Multiple ChoiceIf a small droplet of triacylglycerol molecules is suspended in water, the fat molecules form a "ball of spaghetti" with no particular orientation. But if a droplet of phospholipid molecules is put in water, all the molecules point outward, toward the water. Phospholipids are forced into this orientation because phospholipids have __________.
- Multiple ChoiceThe sex hormones estradiol and testosterone belong to which class of molecules?
- Multiple ChoiceHigh cholesterol levels are considered a major risk factor for heart disease. If it is so bad for humans, why does the body make cholesterol in the first place?
- Multiple ChoiceManufacturers make vegetable oils solid or semisolid at room temperature by __________.