BIO 111 FINAL EXAM STUDY GUIDE VERIFIED TEST QUESTIONS WITH ACCURATE
SOLUTIONS (PROFESSOR MARK HENS UNCG)
What is a hypothesis?
A tentative explanation that can be tested by experiments
Which of the following must be present if diffusion is occurring?
the random movement of atoms or molecules due to kinetic energy
Which of the following prevents the free passage of most substances across a biological
membrane?
The hydrophobic core of the lipid bilayer
Which of the following must be present if NET DIFFUSION is occurring?
a concentration gradient, the movement of atoms or molecules from an area of high
concentration to one of lower concentration, and the random movement of atoms or
molecules due to kinetic energy
Saturated fatty acid side chains have fewer double bonds than unsaturated fatty acid side
chains
True
Which of the following statements is TRUE concerning membrane fluidity?
,Decreased fatty acid side chain saturation and increased temperature increase membrane
fluidity.
Which of the graphs correctly illustrates the relationship between the degree of saturation
of phospholipid fatty acid side chains and the fluidity of biological membranes?
A
Which of the graphs correctly illustrates the relationship between the number of double
bonds present in phospholipid fatty acid side chains and the fluidity of biological
membranes?
C
Which of the following explains why the plasma membranes of the cells in winter wheat
plants can remain fluid when it is extremely cold?
They increase the amount of cholesterol present in the membranes.
This figure represents a beaker containing two solutions of fructose separated by a
membrane. Side A is _________ compared to side B.
Side A contains 0.2M of fructose
Side B contains 0.9M of fructose
hypotonic
,The membrane in the beaker is permeable to fructose and water. Which of the following
statements is TRUE?
Side A contains 0.2M of fructose
Side B contains 0.9M of fructose
(a) There will be net diffusion of water from B to A. (incorrect)
(b) There will be net diffusion of fructose from B to A.
(c) Glucose will not diffuse from B to A.
(d) There will be net diffusion of fructose across the membrane, but there will be no net
diffusion of water.
There will be net diffusion of fructose from B to A and of water from A to B.
Which of the following descriptions of net diffusion will happen to a cell if it is placed into a
hypotonic environment (assuming its membrane is permeable to both water and salt ions)?
Water will leave the cell by osmosis and salt ions will leave the cell by facilitated diffusion
Two solutions are present in a beaker and are separated by a membrane that is permeable
to water, but not permeable to glucose. True or false: The concentration of glucose will
decrease in side A and will increase in side B.
Side A: 15% Glucose
, Side B: 50% Glucose
False
Two solutions are present in a beaker and are separated by a membrane that is permeable
to water, but not permeable to glucose. True or false: The volume of the solution in side B
will gradually increase.
Side A: 15% Glucose
Side B: 50% Glucose
True
What is the difference between anabolic pathways and catabolic pathways?
Anabolic pathways store energy and catabolic pathways release energy in all cells.
Which of the following correctly describe how enzymes increase the rate of chemical
reactions?
QUIZ 2
raising the activation energy for reactions
Which of the following is TRUE concerning membrane fluidity?
QUIZ 2
SOLUTIONS (PROFESSOR MARK HENS UNCG)
What is a hypothesis?
A tentative explanation that can be tested by experiments
Which of the following must be present if diffusion is occurring?
the random movement of atoms or molecules due to kinetic energy
Which of the following prevents the free passage of most substances across a biological
membrane?
The hydrophobic core of the lipid bilayer
Which of the following must be present if NET DIFFUSION is occurring?
a concentration gradient, the movement of atoms or molecules from an area of high
concentration to one of lower concentration, and the random movement of atoms or
molecules due to kinetic energy
Saturated fatty acid side chains have fewer double bonds than unsaturated fatty acid side
chains
True
Which of the following statements is TRUE concerning membrane fluidity?
,Decreased fatty acid side chain saturation and increased temperature increase membrane
fluidity.
Which of the graphs correctly illustrates the relationship between the degree of saturation
of phospholipid fatty acid side chains and the fluidity of biological membranes?
A
Which of the graphs correctly illustrates the relationship between the number of double
bonds present in phospholipid fatty acid side chains and the fluidity of biological
membranes?
C
Which of the following explains why the plasma membranes of the cells in winter wheat
plants can remain fluid when it is extremely cold?
They increase the amount of cholesterol present in the membranes.
This figure represents a beaker containing two solutions of fructose separated by a
membrane. Side A is _________ compared to side B.
Side A contains 0.2M of fructose
Side B contains 0.9M of fructose
hypotonic
,The membrane in the beaker is permeable to fructose and water. Which of the following
statements is TRUE?
Side A contains 0.2M of fructose
Side B contains 0.9M of fructose
(a) There will be net diffusion of water from B to A. (incorrect)
(b) There will be net diffusion of fructose from B to A.
(c) Glucose will not diffuse from B to A.
(d) There will be net diffusion of fructose across the membrane, but there will be no net
diffusion of water.
There will be net diffusion of fructose from B to A and of water from A to B.
Which of the following descriptions of net diffusion will happen to a cell if it is placed into a
hypotonic environment (assuming its membrane is permeable to both water and salt ions)?
Water will leave the cell by osmosis and salt ions will leave the cell by facilitated diffusion
Two solutions are present in a beaker and are separated by a membrane that is permeable
to water, but not permeable to glucose. True or false: The concentration of glucose will
decrease in side A and will increase in side B.
Side A: 15% Glucose
, Side B: 50% Glucose
False
Two solutions are present in a beaker and are separated by a membrane that is permeable
to water, but not permeable to glucose. True or false: The volume of the solution in side B
will gradually increase.
Side A: 15% Glucose
Side B: 50% Glucose
True
What is the difference between anabolic pathways and catabolic pathways?
Anabolic pathways store energy and catabolic pathways release energy in all cells.
Which of the following correctly describe how enzymes increase the rate of chemical
reactions?
QUIZ 2
raising the activation energy for reactions
Which of the following is TRUE concerning membrane fluidity?
QUIZ 2
