Biology 200 Unit 2 Exam Questions
and Answers
b - ANSWER-which of the following is present in a prokaryotic cell
a- mitochondrion
b- ribosome
c- nuclear envelope
d- chloroplast
a - ANSWER-cyanide binds to at least one molecule involved in producing ATP. In a
cell exposed to cyanide, most of the cyanide will be in
a- mitochondrion
b- ribosomes
c- peroxiomes
d- lysosomes
d - ANSWER-which cell would be best for studying lysosomes
a- muscle cell
b- nerve cell
c- bacterial cell
d- phagocytic white blood cell
b - ANSWER-In what way do the membranes of a eukaryotic cell vary
a- Phospholipids are found only in certain membranes
b- Only certain proteins are unique to each membrane
c- only certain membranes of the cell are selectively permeable
d- only certain membranes are constructed from amphipathic molecules
c - ANSWER-According to the fluid mosaic model of membrane structure, proteins of
the membrane are mostly
a- spread it in a continuous layer over the inner and outer surfaces of the membrane
b- Confined to the hydrophobic interior of the membrane
c- embedded in a lipid bilayer
d- randomly oriented in the membrane, with no fixed inside-outside polarity
a - ANSWER-Which of the following factors would tend to increase membrane
fluidity
a- A greater proportion of unsaturated phospholipids
, b- A greater proportion of saturated phospholipids
c- A lower temperature
d- A relatively high protein content in the membrane
c - ANSWER-Which of the following processes includes all the others
a- osmosis
b- diffusion of a solute across a membrane
c- passive transport
d- transport of an ion down it's electrochemical gradient
b - ANSWER-Based on figure 7.19, which of these experimental treatments would
increase the rate of sucrose transport into a plant cell
a- Decreasing extracellular sucrose concentration
b- decrease in extracellular pH
c- decreasing cytoplasmic pH
d- adding a substance that makes the membrane more permeable to hydrogen
atoms
b - ANSWER-Choose the pair of terms that correctly completes this sentence:
catabolism is to anabolism as ______________ is to ______________
a- exergonic; spontaneous
b- exergonic; endergonic
c- free energy; entropy
d- work; energy
c - ANSWER-Most cells cannot harness heat to perform work because
a- heat does not involve a transfer of energy
b- cells do not have much thermal energy; they are relatively cool
c- temperature is usually uniform throughout a cell
d- heat can never be used to do work
b - ANSWER-Which of the following metabolic processes can occur without a net
influx of energy from some other process
a- ADP + (P)i + —> ATP + H2O
b- C6H12O6 + 6 O2 —> 6 CO2 + 6 H2O
c- 6 CO2 + 6 H2O —> C6H12O6 + 6 O2
d- amino acids —> protein
a - ANSWER-If an enzyme in a solution is saturated with substrate, the most
effective way to obtain a faster yield of products is to
a- add more of the enzyme
b- heat the solution to 90°C
c- add more substrate
d- add a non-competitive inhibitor
and Answers
b - ANSWER-which of the following is present in a prokaryotic cell
a- mitochondrion
b- ribosome
c- nuclear envelope
d- chloroplast
a - ANSWER-cyanide binds to at least one molecule involved in producing ATP. In a
cell exposed to cyanide, most of the cyanide will be in
a- mitochondrion
b- ribosomes
c- peroxiomes
d- lysosomes
d - ANSWER-which cell would be best for studying lysosomes
a- muscle cell
b- nerve cell
c- bacterial cell
d- phagocytic white blood cell
b - ANSWER-In what way do the membranes of a eukaryotic cell vary
a- Phospholipids are found only in certain membranes
b- Only certain proteins are unique to each membrane
c- only certain membranes of the cell are selectively permeable
d- only certain membranes are constructed from amphipathic molecules
c - ANSWER-According to the fluid mosaic model of membrane structure, proteins of
the membrane are mostly
a- spread it in a continuous layer over the inner and outer surfaces of the membrane
b- Confined to the hydrophobic interior of the membrane
c- embedded in a lipid bilayer
d- randomly oriented in the membrane, with no fixed inside-outside polarity
a - ANSWER-Which of the following factors would tend to increase membrane
fluidity
a- A greater proportion of unsaturated phospholipids
, b- A greater proportion of saturated phospholipids
c- A lower temperature
d- A relatively high protein content in the membrane
c - ANSWER-Which of the following processes includes all the others
a- osmosis
b- diffusion of a solute across a membrane
c- passive transport
d- transport of an ion down it's electrochemical gradient
b - ANSWER-Based on figure 7.19, which of these experimental treatments would
increase the rate of sucrose transport into a plant cell
a- Decreasing extracellular sucrose concentration
b- decrease in extracellular pH
c- decreasing cytoplasmic pH
d- adding a substance that makes the membrane more permeable to hydrogen
atoms
b - ANSWER-Choose the pair of terms that correctly completes this sentence:
catabolism is to anabolism as ______________ is to ______________
a- exergonic; spontaneous
b- exergonic; endergonic
c- free energy; entropy
d- work; energy
c - ANSWER-Most cells cannot harness heat to perform work because
a- heat does not involve a transfer of energy
b- cells do not have much thermal energy; they are relatively cool
c- temperature is usually uniform throughout a cell
d- heat can never be used to do work
b - ANSWER-Which of the following metabolic processes can occur without a net
influx of energy from some other process
a- ADP + (P)i + —> ATP + H2O
b- C6H12O6 + 6 O2 —> 6 CO2 + 6 H2O
c- 6 CO2 + 6 H2O —> C6H12O6 + 6 O2
d- amino acids —> protein
a - ANSWER-If an enzyme in a solution is saturated with substrate, the most
effective way to obtain a faster yield of products is to
a- add more of the enzyme
b- heat the solution to 90°C
c- add more substrate
d- add a non-competitive inhibitor
