WGU C190 INTRO TO BIO - PERSONAL
PRACTICE QUESTIONS WITH CORRECT
ANSWERS
Water molecules binding to each other is called _______; water molecules binding to
other molecules is called _______. - Correct Answers -Cohesion; adhesion
Water molecules form hydrogen bonds because water is - Correct Answers -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 Answers -Polar; adhesion
Water molecules within these cells will also bind to each other. What is this called? -
Correct Answers -Cohesion
Dissolving sugar in water makes a _______. The sugar is the _____ and the water is
the _____ - Correct Answers -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 Answers -Solutes
What characteristic of water allows a paperclip to float on the surface of the water. -
Correct Answers -Surface tension
The information in an mRNA transcript is converted into a sequence of amino acids
through the process of - Correct Answers -translation
The process of translation begins at the: - Correct Answers -The start codon (AUG)
marks the beginning of translation
How does the correct tRNA bind to the next codon on mRNA? - Correct Answers -The
anticodon on the tRNA is complementary to the codon on the mRNA
, Why does mercury (Hg) not travel as far up the capillary tube as water does? - Correct
Answers -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 Answers -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 Answers -The
smaller cells are more resistant to air bubbles.
Explain why plants produce larger cells during wet seasons. - Correct Answers -These
cells can transport more water.
Organic molecules take many different shapes. This is because: - Correct Answers -
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 Answers -Maltose (a
disaccharide), cellulose, starch
Which molecule is abundant in seeds and is easily digested to yield glucose? - Correct
Answers -Starch
Nonpolar molecules that lack highly electronegative atoms such as oxygen are - Correct
Answers -hydrophobic
Ionic substances and polar molecules are _____ because they dissolve other polar
molecules or molecules with polar functional groups like hydroxyl groups. - Correct
Answers -Hydrophillic
Nonpolar molecules are ______ because they usually contain many carbon hydrogen
bonds (C-H). - Correct Answers -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 Answers -Cellulose
Starch is an easily used starting point for fuel production. Why is it much harder to use
cellulose for the same purpose? - Correct Answers -Cellulose is difficult to hydrolyze
(digest)
Cellulose is naturally found in many foods, and it is used as an added ingredient in
many health food products. Why might cellulose be a "healthy" addition to bread or
breakfast cereal? - Correct Answers -it slows the absorption of sugar from food into the
blood
PRACTICE QUESTIONS WITH CORRECT
ANSWERS
Water molecules binding to each other is called _______; water molecules binding to
other molecules is called _______. - Correct Answers -Cohesion; adhesion
Water molecules form hydrogen bonds because water is - Correct Answers -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 Answers -Polar; adhesion
Water molecules within these cells will also bind to each other. What is this called? -
Correct Answers -Cohesion
Dissolving sugar in water makes a _______. The sugar is the _____ and the water is
the _____ - Correct Answers -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 Answers -Solutes
What characteristic of water allows a paperclip to float on the surface of the water. -
Correct Answers -Surface tension
The information in an mRNA transcript is converted into a sequence of amino acids
through the process of - Correct Answers -translation
The process of translation begins at the: - Correct Answers -The start codon (AUG)
marks the beginning of translation
How does the correct tRNA bind to the next codon on mRNA? - Correct Answers -The
anticodon on the tRNA is complementary to the codon on the mRNA
, Why does mercury (Hg) not travel as far up the capillary tube as water does? - Correct
Answers -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 Answers -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 Answers -The
smaller cells are more resistant to air bubbles.
Explain why plants produce larger cells during wet seasons. - Correct Answers -These
cells can transport more water.
Organic molecules take many different shapes. This is because: - Correct Answers -
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 Answers -Maltose (a
disaccharide), cellulose, starch
Which molecule is abundant in seeds and is easily digested to yield glucose? - Correct
Answers -Starch
Nonpolar molecules that lack highly electronegative atoms such as oxygen are - Correct
Answers -hydrophobic
Ionic substances and polar molecules are _____ because they dissolve other polar
molecules or molecules with polar functional groups like hydroxyl groups. - Correct
Answers -Hydrophillic
Nonpolar molecules are ______ because they usually contain many carbon hydrogen
bonds (C-H). - Correct Answers -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 Answers -Cellulose
Starch is an easily used starting point for fuel production. Why is it much harder to use
cellulose for the same purpose? - Correct Answers -Cellulose is difficult to hydrolyze
(digest)
Cellulose is naturally found in many foods, and it is used as an added ingredient in
many health food products. Why might cellulose be a "healthy" addition to bread or
breakfast cereal? - Correct Answers -it slows the absorption of sugar from food into the
blood
