WGU C190 Intro to Biology practice test questions with answers

WGU C190 Intro to Biology practice test|| || || || || || ||




questions with answers || ||




Fats and oils are composed of - CORRECT ANSWERS ✔✔Fatty acids and
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glycerol



Fatty acids can naturally be saturated or unsaturated. A saturated fatty acid
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has - CORRECT ANSWERS ✔✔.
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All single covalent bonds
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Triglycerides, a type of fat, are composed of what two subunits? - CORRECT
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ANSWERS ✔✔Fatty acids and glycerol || || || ||




What would you have to do to make a fat from the fatty acid shown above? -
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CORRECT ANSWERS ✔✔Attach it to a glycerol along with two other fatty
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acids.



If one or more of the fatty acids in a triglyceride include omega-3 fatty acids,
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what can you predict about this substance at room temperature? - CORRECT
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ANSWERS ✔✔It is a liquid oil || || || || ||




What kinds of molecules are the major fuel for the salmon's long trip? -
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CORRECT ANSWERS ✔✔Triglycerides (fats / oils)
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, Based on your knowledge of the structure of triglycerides, what products
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would you expect to result from the complete hydrolysis of a fat molecule?
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More than one is correct. - CORRECT ANSWERS ✔✔Fatty acids and glycerol
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The blubber layer helps insulate mammals and birds that live in cold water;
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fat does not conduct heat very quickly. Applying what you know about lipids,
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what is the main advantage of covering feathers or fur in oil? - CORRECT
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ANSWERS ✔✔Oil sheds water and keeps underlying layers of fur or downy
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feathers dry. ||




Another type of lipid that composes cells are called phospholipids.
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Phospholipids differ from other lipids because they - CORRECT ANSWERS || || || || || || || || || ||



✔✔Contains a hydrophobic and hydrophilic end || || || || ||




Highly simplified diagram of a membrane's structure is made up of -
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CORRECT ANSWERS ✔✔Phospholipids || ||




Which part of the molecules is hydrophilic? - CORRECT ANSWERS ✔✔The
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heads



Ions of salt (sodium, NA+, and chloride, Cl−) are highly hydrophilic. Will
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they easily pass through the layer to enter or leave a cell? - CORRECT
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ANSWERS ✔✔No. ||




What are molecules? - CORRECT ANSWERS ✔✔Molecules are made of
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atoms