WGU C190 Exam Questions and Answers |
Accurate Solutions with Clear Explanations
| Grade A+
• Fatty acids can naturally be saturated or unsaturated. A saturated fatty acid has -✓✓.
All single covalent bonds
• Triglycerides, a type of fat, are composed of what two subunits? -✓✓Fatty acids and
glycerol
• What would you have to do to make a fat from the fatty acid shown above? -✓✓Attach
it to a glycerol along with two other fatty acids.
• 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? -✓✓It is a liquid oil
• What kinds of molecules are the major fuel for the salmon's long trip? -✓✓Triglycerides
(fats / oils)
• 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. -✓✓Fatty acids and glycerol
• 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? -✓✓Oil sheds water and keeps underlying
layers of fur or downy feathers dry.
• Another type of lipid that composes cells are called phospholipids. Phospholipids differ
from other lipids because they -✓✓Contains a hydrophobic and hydrophilic end
• Highly simplified diagram of a membrane's structure is made up of -✓✓Phospholipids
• Which part of the molecules is hydrophilic? -✓✓The heads
• Ions of salt (sodium, NA+, and chloride, Cl−) are highly hydrophilic. Will they easily
pass through the layer to enter or leave a cell? -✓✓No.
• What are molecules? -✓✓Molecules are made of atoms
• Below is an image of the smallest amino acid: Glycine. What does each line in the
picture of the amino acid represent? -✓✓A shared pair of electrons in a covalent bond.
, • 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? -✓✓These amino acids are
charged and will attract each other
• The amino acid chain of a protein is held together by -✓✓Covalent bonds
• If the protein is mainly structural and needs to maintain a stable, rigid form, which
bonds would it use? -✓✓Covalent bonds
• If the protein needs to be flexible, with bonds that easily break and reform, which
bonds would it use? -✓✓Hydrogen
• Water molecules binding to each other is called a -✓✓Cohesion
• Water molecules binding to other molecules is called -✓✓Adhesion
• Water molecules form hydrogen bonds because water is -✓✓Polar
• Water can bind to the walls of these cells because they are -✓✓Polar
• When water binds to the walls of the cells, this is called an -✓✓Adhesion
• Water molecules within these cells will also bind to each other. What is this called? -
✓✓Cohesion
• Dissolving sugar in water makes a -✓✓Solution
• The sugar is the -✓✓Solute
• The water is the -✓✓Sovent
• As water moves up the plant, it carries matter with it (such as nutrients and some
hormones). What are these materials called? -✓✓Solutes
• What characteristic of water allows this paperclip to float on the surface of the water? -
✓✓Surface tension
• Why does mercury (Hg) not travel as far up the capillary tube as water does? -
✓✓Mercury is not as adhesive as water
• If the plant gets too dry, the water column can break. This creates an air bubble in the
xylem.
Accurate Solutions with Clear Explanations
| Grade A+
• Fatty acids can naturally be saturated or unsaturated. A saturated fatty acid has -✓✓.
All single covalent bonds
• Triglycerides, a type of fat, are composed of what two subunits? -✓✓Fatty acids and
glycerol
• What would you have to do to make a fat from the fatty acid shown above? -✓✓Attach
it to a glycerol along with two other fatty acids.
• 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? -✓✓It is a liquid oil
• What kinds of molecules are the major fuel for the salmon's long trip? -✓✓Triglycerides
(fats / oils)
• 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. -✓✓Fatty acids and glycerol
• 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? -✓✓Oil sheds water and keeps underlying
layers of fur or downy feathers dry.
• Another type of lipid that composes cells are called phospholipids. Phospholipids differ
from other lipids because they -✓✓Contains a hydrophobic and hydrophilic end
• Highly simplified diagram of a membrane's structure is made up of -✓✓Phospholipids
• Which part of the molecules is hydrophilic? -✓✓The heads
• Ions of salt (sodium, NA+, and chloride, Cl−) are highly hydrophilic. Will they easily
pass through the layer to enter or leave a cell? -✓✓No.
• What are molecules? -✓✓Molecules are made of atoms
• Below is an image of the smallest amino acid: Glycine. What does each line in the
picture of the amino acid represent? -✓✓A shared pair of electrons in a covalent bond.
, • 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? -✓✓These amino acids are
charged and will attract each other
• The amino acid chain of a protein is held together by -✓✓Covalent bonds
• If the protein is mainly structural and needs to maintain a stable, rigid form, which
bonds would it use? -✓✓Covalent bonds
• If the protein needs to be flexible, with bonds that easily break and reform, which
bonds would it use? -✓✓Hydrogen
• Water molecules binding to each other is called a -✓✓Cohesion
• Water molecules binding to other molecules is called -✓✓Adhesion
• Water molecules form hydrogen bonds because water is -✓✓Polar
• Water can bind to the walls of these cells because they are -✓✓Polar
• When water binds to the walls of the cells, this is called an -✓✓Adhesion
• Water molecules within these cells will also bind to each other. What is this called? -
✓✓Cohesion
• Dissolving sugar in water makes a -✓✓Solution
• The sugar is the -✓✓Solute
• The water is the -✓✓Sovent
• As water moves up the plant, it carries matter with it (such as nutrients and some
hormones). What are these materials called? -✓✓Solutes
• What characteristic of water allows this paperclip to float on the surface of the water? -
✓✓Surface tension
• Why does mercury (Hg) not travel as far up the capillary tube as water does? -
✓✓Mercury is not as adhesive as water
• If the plant gets too dry, the water column can break. This creates an air bubble in the
xylem.
