WGU C190 INTRO TO BIOLOGY PRACTICE
TEST QUESTIONS AND ANSWERS
Fats and oils are composed of
Fatty acids and glycerol
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
TEST QUESTIONS AND ANSWERS
Fats and oils are composed of
Fatty acids and glycerol
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
