Bio 121 Final exam review
Study online at https://quizlet.com/_3elviq
Which of the following describes catabol-
ic reactions?
A. They are endergonic and have a neg-
ative change in free energy
B. They are exergonic and have a nega-
B
tive change in free energy.
C. They are exergonic and have a posi-
tive change in free energy.
D. They are endergonic and have a pos-
itive change in free energy.
The synthesis of ATP from ADP and Pi is
a(n) _____ reaction with _____ ”G.
A. exergonic; a positive
B. endergonic; a negative D
C. exergonic; a negative
D. endergonic; a positive
E. reversible; zero
During enzyme regulation, a non-com-
petitive inhibitor will bind to an enzyme's
________ site.
A. active D
B. electromagnetic
C. reaction
D. allosteric
The degree of disorder that, according
to the second law of thermodynamics, is
always increasing
A. energy
C
B. work
C. entropy
D. potential difference
E. ecology
Sometimes, atoms gain or lose particles.
The loss of which of the following results
in a change of atomic mass? D
A. a neutron
B. a proton
, Bio 121 Final exam review
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C. an electron
D. a neutron and a proton
E. a proton and an electron
Which of the following bonds rely on
the attraction of positive and negative
charges?
A. ionic bonds
D
B. covalent bonds
C. hydrogen bonds
D. ionic bonds and hydrogen bonds
E. ionic bonds and covalent bonds
Several chemical properties make water
uniquely suited for its role as a central
"molecule of life." Which of the following
is FALSE?
A. Hydrogen bonding leads to high co-
hesiveness between water molecules.
D
B. Water resists temperature changes.
C. Water molecules are always polar.
D. The structure of a water molecule is
stabilized by hydrogen bonds.
E. Water is a good solvent of polar mol-
ecules and ions.
An unsaturated fat contains:
A. only carbon and hydrogen.
B. only single covalent bonds between
carbon atoms.
C
C. one or more double bonds between
carbon atoms.
D. one or more double bonds between
hydrogen atoms.
Which one of the following is a pyrimidine
found in DNA?
A. adenine
D
B. guanine
C. uracil
D. thymine
, Bio 121 Final exam review
Study online at https://quizlet.com/_3elviq
E. none of the other answer options is
correct
Which one of the following is NOT a com-
ponent of a phospholipid?
A. a 3-carbon backbone such as glyc-
erol
D
B. a phosphate group
C. two fatty acid tails
D. a core of four fused carbon rings
E. All of these choices are correct.
Imagine you have discovered a new
species of bacteria. To begin your investi-
gation of this organism, you run an assay
on the total nucleotide content of the bac-
terial DNA. If the cytosine content of DNA
from the bacterial cells is 40%, what is A
the adenine content?
A. 10%
B. 20%
C. 40%
D. 60%
In a DNA strand, successive nucleotides
are linked by:
A. hydrogen bonds
B. base stacking C
C. phosphodiester bonds
D. glyosidic bonds
E. peptide bonds
Peptide bonds formed between amino
acids stabilize the __________ structure
of a protein.
A. primary A
B. secondary
C. tertiary
D. quaternary
Suppose you are studying the transport
of a certain polar molecule across the
, Bio 121 Final exam review
Study online at https://quizlet.com/_3elviq
plasma membrane of cells in culture.
Over a period of time, you measure the
concentration of a polar molecule inside
and outside of the cells. You find that the
concentration of the molecule is lower in
the cell but is gradually increasing. You
also measure the ATP concentration in-
side the cell and find that it is not chang-
A
ing. Which of the following is probably
responsible for the transport of this polar
substance into the cell?
A. facilitated diffusion
B. secondary active transport
C. endocytosis
D. active transport
E. simple diffusion
How is a carrier protein different from a
channel protein?
A. Carrier proteins use ATP, but channel
proteins do not.
B. Carrier proteins undergo conforma-
tional change so that they are open al-
ternately to one side of the membrane or
the other. B
C. Transport through carrier proteins de-
pends on concentration gradients, but
transport through channel proteins does
not.
D. Transport through a carrier does not
depend on the random motion of mole-
cules.
How are oxygen atoms released during
photosynthesis?
A. The splitting of water molecules
B. The breakdown of glucose A
C. The splitting of carbon dioxide mole-
cules
D. Using the electron transport chain
Study online at https://quizlet.com/_3elviq
Which of the following describes catabol-
ic reactions?
A. They are endergonic and have a neg-
ative change in free energy
B. They are exergonic and have a nega-
B
tive change in free energy.
C. They are exergonic and have a posi-
tive change in free energy.
D. They are endergonic and have a pos-
itive change in free energy.
The synthesis of ATP from ADP and Pi is
a(n) _____ reaction with _____ ”G.
A. exergonic; a positive
B. endergonic; a negative D
C. exergonic; a negative
D. endergonic; a positive
E. reversible; zero
During enzyme regulation, a non-com-
petitive inhibitor will bind to an enzyme's
________ site.
A. active D
B. electromagnetic
C. reaction
D. allosteric
The degree of disorder that, according
to the second law of thermodynamics, is
always increasing
A. energy
C
B. work
C. entropy
D. potential difference
E. ecology
Sometimes, atoms gain or lose particles.
The loss of which of the following results
in a change of atomic mass? D
A. a neutron
B. a proton
, Bio 121 Final exam review
Study online at https://quizlet.com/_3elviq
C. an electron
D. a neutron and a proton
E. a proton and an electron
Which of the following bonds rely on
the attraction of positive and negative
charges?
A. ionic bonds
D
B. covalent bonds
C. hydrogen bonds
D. ionic bonds and hydrogen bonds
E. ionic bonds and covalent bonds
Several chemical properties make water
uniquely suited for its role as a central
"molecule of life." Which of the following
is FALSE?
A. Hydrogen bonding leads to high co-
hesiveness between water molecules.
D
B. Water resists temperature changes.
C. Water molecules are always polar.
D. The structure of a water molecule is
stabilized by hydrogen bonds.
E. Water is a good solvent of polar mol-
ecules and ions.
An unsaturated fat contains:
A. only carbon and hydrogen.
B. only single covalent bonds between
carbon atoms.
C
C. one or more double bonds between
carbon atoms.
D. one or more double bonds between
hydrogen atoms.
Which one of the following is a pyrimidine
found in DNA?
A. adenine
D
B. guanine
C. uracil
D. thymine
, Bio 121 Final exam review
Study online at https://quizlet.com/_3elviq
E. none of the other answer options is
correct
Which one of the following is NOT a com-
ponent of a phospholipid?
A. a 3-carbon backbone such as glyc-
erol
D
B. a phosphate group
C. two fatty acid tails
D. a core of four fused carbon rings
E. All of these choices are correct.
Imagine you have discovered a new
species of bacteria. To begin your investi-
gation of this organism, you run an assay
on the total nucleotide content of the bac-
terial DNA. If the cytosine content of DNA
from the bacterial cells is 40%, what is A
the adenine content?
A. 10%
B. 20%
C. 40%
D. 60%
In a DNA strand, successive nucleotides
are linked by:
A. hydrogen bonds
B. base stacking C
C. phosphodiester bonds
D. glyosidic bonds
E. peptide bonds
Peptide bonds formed between amino
acids stabilize the __________ structure
of a protein.
A. primary A
B. secondary
C. tertiary
D. quaternary
Suppose you are studying the transport
of a certain polar molecule across the
, Bio 121 Final exam review
Study online at https://quizlet.com/_3elviq
plasma membrane of cells in culture.
Over a period of time, you measure the
concentration of a polar molecule inside
and outside of the cells. You find that the
concentration of the molecule is lower in
the cell but is gradually increasing. You
also measure the ATP concentration in-
side the cell and find that it is not chang-
A
ing. Which of the following is probably
responsible for the transport of this polar
substance into the cell?
A. facilitated diffusion
B. secondary active transport
C. endocytosis
D. active transport
E. simple diffusion
How is a carrier protein different from a
channel protein?
A. Carrier proteins use ATP, but channel
proteins do not.
B. Carrier proteins undergo conforma-
tional change so that they are open al-
ternately to one side of the membrane or
the other. B
C. Transport through carrier proteins de-
pends on concentration gradients, but
transport through channel proteins does
not.
D. Transport through a carrier does not
depend on the random motion of mole-
cules.
How are oxygen atoms released during
photosynthesis?
A. The splitting of water molecules
B. The breakdown of glucose A
C. The splitting of carbon dioxide mole-
cules
D. Using the electron transport chain
