WGU C190 Intro to Biology practice test questions
Study online at https://quizlet.com/_di7sba
1. Fats and oils are composed of: Fatty acids and glycerol
2. Fatty acids can naturally be saturated or unsaturated. A saturated fatty acid
has: .
All single covalent bonds
3. Triglycerides, a type of fat, are composed of what two subunits?: Fatty acids and
glycerol
4. 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.
5. 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
6. What kinds of molecules are the major fuel for the salmon's long trip?: Triglyc-
erides (fats / oils)
7. 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
8. 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.
9. Another type of lipid that composes cells are called phospholipids. Phospho-
lipids differ from other lipids because they: Contains a hydrophobic and hydrophilic end
10. Highly simplified diagram of a membrane's structure is made up of: Phospho-
lipids
11. Which part of the molecules is hydrophilic?: The heads
12. 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.
13. What are molecules?: Molecules are made of atoms
14. 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.
15. 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
1/5
, WGU C190 Intro to Biology practice test questions
Study online at https://quizlet.com/_di7sba
16. The amino acid chain of a protein is held together by: Covalent bonds
17. If the protein is mainly structural and needs to maintain a stable, rigid form,
which bonds would it use?: Covalent bonds
18. If the protein needs to be flexible, with bonds that easily break and reform,
which bonds would it use?: Hydrogen
19. Water molecules binding to each other is called a: Cohesion
20. Water molecules binding to other molecules is called: Adhesion
21. Water molecules form hydrogen bonds because water is: Polar
22. Water can bind to the walls of these cells because they are: Polar
23. When water binds to the walls of the cells, this is called an: Adhesion
24. Water molecules within these cells will also bind to each other. What is this
called?: Cohesion
25. Dissolving sugar in water makes a: Solution
26. The sugar is the: Solute
27. The water is the: Sovent
28. As water moves up the plant, it carries matter with it (such as nutrients and
some hormones). What are these materials called?: Solutes
29. What characteristic of water allows this paperclip to float on the surface of
the water?: Surface tension
30. Why does mercury (Hg) not travel as far up the capillary tube as water
does?: Mercury is not as adhesive as water
31. If the plant gets too dry, the water column can break. This creates an air
bubble in the xylem.
What happens to the water when the air bubble forms?: The water is still adhering to the
xylem walls, but the water column is no longer continuous
32. Explain why plants produce smaller cells during dry seasons?: The smaller cells are
more resistant to air bubbles
33. Explain why plants produce larger cells during wet seasons?: These cells can
transport more water
34. Which molecule is abundant in seeds and is easily digested to yield glucose?-
: Starch
2/5
Study online at https://quizlet.com/_di7sba
1. Fats and oils are composed of: Fatty acids and glycerol
2. Fatty acids can naturally be saturated or unsaturated. A saturated fatty acid
has: .
All single covalent bonds
3. Triglycerides, a type of fat, are composed of what two subunits?: Fatty acids and
glycerol
4. 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.
5. 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
6. What kinds of molecules are the major fuel for the salmon's long trip?: Triglyc-
erides (fats / oils)
7. 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
8. 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.
9. Another type of lipid that composes cells are called phospholipids. Phospho-
lipids differ from other lipids because they: Contains a hydrophobic and hydrophilic end
10. Highly simplified diagram of a membrane's structure is made up of: Phospho-
lipids
11. Which part of the molecules is hydrophilic?: The heads
12. 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.
13. What are molecules?: Molecules are made of atoms
14. 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.
15. 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
1/5
, WGU C190 Intro to Biology practice test questions
Study online at https://quizlet.com/_di7sba
16. The amino acid chain of a protein is held together by: Covalent bonds
17. If the protein is mainly structural and needs to maintain a stable, rigid form,
which bonds would it use?: Covalent bonds
18. If the protein needs to be flexible, with bonds that easily break and reform,
which bonds would it use?: Hydrogen
19. Water molecules binding to each other is called a: Cohesion
20. Water molecules binding to other molecules is called: Adhesion
21. Water molecules form hydrogen bonds because water is: Polar
22. Water can bind to the walls of these cells because they are: Polar
23. When water binds to the walls of the cells, this is called an: Adhesion
24. Water molecules within these cells will also bind to each other. What is this
called?: Cohesion
25. Dissolving sugar in water makes a: Solution
26. The sugar is the: Solute
27. The water is the: Sovent
28. As water moves up the plant, it carries matter with it (such as nutrients and
some hormones). What are these materials called?: Solutes
29. What characteristic of water allows this paperclip to float on the surface of
the water?: Surface tension
30. Why does mercury (Hg) not travel as far up the capillary tube as water
does?: Mercury is not as adhesive as water
31. If the plant gets too dry, the water column can break. This creates an air
bubble in the xylem.
What happens to the water when the air bubble forms?: The water is still adhering to the
xylem walls, but the water column is no longer continuous
32. Explain why plants produce smaller cells during dry seasons?: The smaller cells are
more resistant to air bubbles
33. Explain why plants produce larger cells during wet seasons?: These cells can
transport more water
34. Which molecule is abundant in seeds and is easily digested to yield glucose?-
: Starch
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