WGU C190 Intro to Bio – Personal
UPDATED ACTUAL Exam Questions and
CORRECT Answers
Water molecules binding to each other is called _______; water molecules binding to other
molecules is called _______. - CORRECT ANSWER - Cohesion; adhesion
Water molecules form hydrogen bonds because water is - CORRECT ANSWER - Polar
Water can bind to the walls of these cells because they are _____ When water binds to the walls
of the cells, this is called ________ - CORRECT ANSWER - Polar; adhesion
Water molecules within these cells will also bind to each other. What is this called? - CORRECT
ANSWER - Cohesion
Dissolving sugar in water makes a _______. The sugar is the _____ and the water is the _____ -
CORRECT ANSWER - Solution; solute; solvent
As water moves up the plant, it carries matter with it (such as nutrients and some hormones).
What are these materials called? - CORRECT ANSWER - Solutes
What characteristic of water allows a paperclip to float on the surface of the water. - CORRECT
ANSWER - Surface tension
Why does mercury (Hg) not travel as far up the capillary tube as water does? - CORRECT
ANSWER - 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.
What happens to the water when the air bubble forms? - CORRECT ANSWER - The
water is still adhering to the xylem walls, but the water column is no longer continuous.
, Explain why plants produce smaller cells during dry seasons. - CORRECT ANSWER -
The smaller cells are more resistant to air bubbles.
Explain why plants produce larger cells during wet seasons. - CORRECT ANSWER -
These cells can transport more water.
Organic molecules take many different shapes. This is because: - CORRECT ANSWER -
Carbon can form up to four covalent bonds with other molecules, allowing for a variety of
structures
Which of the following molecules might be broken down (hydrolyzed) to produce simple
sugars? Select all that apply; more than one is correct. - CORRECT ANSWER - Maltose
(a disaccharide), cellulose, starch
Which molecule is abundant in seeds and is easily digested to yield glucose? - CORRECT
ANSWER - Starch
Nonpolar molecules that lack highly electronegative atoms such as oxygen are - CORRECT
ANSWER - hydrophobic
Ionic substances and polar molecules are _____ because they dissolve other polar molecules or
molecules with polar functional groups like hydroxyl groups. - CORRECT ANSWER -
Hydrophillic
Nonpolar molecules are ______ because they usually contain many carbon hydrogen bonds (C-
H). - CORRECT ANSWER - hydrophobic
_______ is the most abundant organic molecule on planet Earth. It is a polysaccharide that is
used as a structural material in the cell walls of plants. You can get it out of grass, wood, old
newspapers, and crop byproducts. - CORRECT ANSWER - Cellulose
UPDATED ACTUAL Exam Questions and
CORRECT Answers
Water molecules binding to each other is called _______; water molecules binding to other
molecules is called _______. - CORRECT ANSWER - Cohesion; adhesion
Water molecules form hydrogen bonds because water is - CORRECT ANSWER - Polar
Water can bind to the walls of these cells because they are _____ When water binds to the walls
of the cells, this is called ________ - CORRECT ANSWER - Polar; adhesion
Water molecules within these cells will also bind to each other. What is this called? - CORRECT
ANSWER - Cohesion
Dissolving sugar in water makes a _______. The sugar is the _____ and the water is the _____ -
CORRECT ANSWER - Solution; solute; solvent
As water moves up the plant, it carries matter with it (such as nutrients and some hormones).
What are these materials called? - CORRECT ANSWER - Solutes
What characteristic of water allows a paperclip to float on the surface of the water. - CORRECT
ANSWER - Surface tension
Why does mercury (Hg) not travel as far up the capillary tube as water does? - CORRECT
ANSWER - 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.
What happens to the water when the air bubble forms? - CORRECT ANSWER - The
water is still adhering to the xylem walls, but the water column is no longer continuous.
, Explain why plants produce smaller cells during dry seasons. - CORRECT ANSWER -
The smaller cells are more resistant to air bubbles.
Explain why plants produce larger cells during wet seasons. - CORRECT ANSWER -
These cells can transport more water.
Organic molecules take many different shapes. This is because: - CORRECT ANSWER -
Carbon can form up to four covalent bonds with other molecules, allowing for a variety of
structures
Which of the following molecules might be broken down (hydrolyzed) to produce simple
sugars? Select all that apply; more than one is correct. - CORRECT ANSWER - Maltose
(a disaccharide), cellulose, starch
Which molecule is abundant in seeds and is easily digested to yield glucose? - CORRECT
ANSWER - Starch
Nonpolar molecules that lack highly electronegative atoms such as oxygen are - CORRECT
ANSWER - hydrophobic
Ionic substances and polar molecules are _____ because they dissolve other polar molecules or
molecules with polar functional groups like hydroxyl groups. - CORRECT ANSWER -
Hydrophillic
Nonpolar molecules are ______ because they usually contain many carbon hydrogen bonds (C-
H). - CORRECT ANSWER - hydrophobic
_______ is the most abundant organic molecule on planet Earth. It is a polysaccharide that is
used as a structural material in the cell walls of plants. You can get it out of grass, wood, old
newspapers, and crop byproducts. - CORRECT ANSWER - Cellulose
