WGU C190 Intro to Biology practice Exam Questions and Answers
with Verified Solutions | Latest 2026 Update
Q: Fats and oils are composed of
Answer:
Fatty acids and glycerol
Q: Fatty acids can naturally be saturated or unsaturated. A saturated fatty acid
has
Answer:
. All single covalent bonds
Q: Triglycerides, a type of fat, are composed of what two subunits?
Answer:
Fatty acids and glycerol
Q: What would you have to do to make a fat from the fatty acid shown above?
Answer:
Attach it to a glycerol along with two other fatty acids.
Q: 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?
Answer:
It is a liquid oil
Q: What kinds of molecules are the major fuel for the salmon's long trip?
Answer:
Triglycerides (fats / oils)
Q: 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.
Answer:
Fatty acids and glycerol
, Q: The blubber layer helps insulate mammals and birds that live in cold water;
fat does not conduct heat very quickly. Applying what you know about lipids,
what is the main advantage of covering feathers or fur in oil?
Answer:
Oil sheds water and keeps underlying layers of fur or downy feathers dry.
Q: Another type of lipid that composes cells are called phospholipids.
Phospholipids differ from other lipids because they
Answer:
Contains a hydrophobic and hydrophilic end
Q: Highly simplified diagram of a membrane's structure is made up of
Answer:
Phospholipids
Q: Which part of the molecules is hydrophilic?
Answer:
The heads
Q: Ions of salt (sodium, NA+, and chloride, Cl−) are highly hydrophilic. Will
they easily pass through the layer to enter or leave a cell?
Answer:
No.
Q: What are molecules?
Answer:
Molecules are made of atoms
Q: Below is an image of the smallest amino acid: Glycine. What does each line
in the picture of the amino acid represent?
Answer:
A shared pair of electrons in a covalent bond.
Q: 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?
with Verified Solutions | Latest 2026 Update
Q: Fats and oils are composed of
Answer:
Fatty acids and glycerol
Q: Fatty acids can naturally be saturated or unsaturated. A saturated fatty acid
has
Answer:
. All single covalent bonds
Q: Triglycerides, a type of fat, are composed of what two subunits?
Answer:
Fatty acids and glycerol
Q: What would you have to do to make a fat from the fatty acid shown above?
Answer:
Attach it to a glycerol along with two other fatty acids.
Q: 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?
Answer:
It is a liquid oil
Q: What kinds of molecules are the major fuel for the salmon's long trip?
Answer:
Triglycerides (fats / oils)
Q: 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.
Answer:
Fatty acids and glycerol
, Q: The blubber layer helps insulate mammals and birds that live in cold water;
fat does not conduct heat very quickly. Applying what you know about lipids,
what is the main advantage of covering feathers or fur in oil?
Answer:
Oil sheds water and keeps underlying layers of fur or downy feathers dry.
Q: Another type of lipid that composes cells are called phospholipids.
Phospholipids differ from other lipids because they
Answer:
Contains a hydrophobic and hydrophilic end
Q: Highly simplified diagram of a membrane's structure is made up of
Answer:
Phospholipids
Q: Which part of the molecules is hydrophilic?
Answer:
The heads
Q: Ions of salt (sodium, NA+, and chloride, Cl−) are highly hydrophilic. Will
they easily pass through the layer to enter or leave a cell?
Answer:
No.
Q: What are molecules?
Answer:
Molecules are made of atoms
Q: Below is an image of the smallest amino acid: Glycine. What does each line
in the picture of the amino acid represent?
Answer:
A shared pair of electrons in a covalent bond.
Q: 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?
