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WGU C190 INTRO TO BIO - EXAM
PRACTICE QUESTIONS | 115
QUESTIONS WITH 100% CORRECT
ANSWERS | VERIFIED | LATEST
UPDATE
Question : Fats and oils are composed of
Correct answer: Fatty acids and glycerol
Question : Fatty acids can naturally be saturated or
unsaturated. A saturated fatty acid has .
Correct answer: All single covalent bonds
Question : Triglycerides, a type of fat, are composed of what
two subunits?
Correct answer: Fatty acids and glycerol
Question : What would you have to do to make a fat from the
fatty acid shown above?
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Correct answer: Attach it to a glycerol along with two other
fatty acids.
Question : If one or more of the fatty acids in a triglyceride
include omega-3 fatty acids, what can you predict about this substance at room temperature?
Correct answer: It is a liquid oil
Question : What kinds of molecules are the major fuel for the
salmon's long trip?
Correct answer: Triglycerides (fats / oils)
Question : Based on your knowledge of the structure of
triglycerides, what products would you expect to result from the complete hydrolysis of a fat molecule? More than one is correct.
Correct answer: Fatty acids and glycerol
Question : The blubber layer helps insulate mammals and
birds that live in cold water; fat does not conduct heat very
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quickly. Applying what you know about lipids, what is the main advantage of covering feathers or fur in oil?
Correct answer: Oil sheds water and keeps underlying layers
of fur or downy feathers dry.
Question : Another type of lipid that composes cells are called
phospholipids. Phospholipids differ from other lipids because they
Correct answer: Contains a hydrophobic and hydrophilic end
Question : Highly simplified diagram of a membrane's
structure is made up of
Correct answer: Phospholipids
Question : Which part of the molecules is hydrophilic?
Correct answer: The heads
Question : Ions of salt (sodium, NA+, and chloride, Cl−) are
highly hydrophilic. Will they easily pass through the layer to enter or leave a cell?
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Correct answer: No.
Question : What are molecules?
Correct answer: Molecules are made of atoms
Question : Below is an image of the smallest amino acid: Glycine. What does each line in the picture of the amino acid represent?
Correct answer: A shared pair of electrons in a covalent bond.
Question : A peptide is built so that the red amino acid is
glutamic acid and the blue amino acid is lysine. How will these amino acids respond to each other?
Correct answer: These amino acids are charged and will
attract each other
Question : The amino acid chain of a protein is held together
by