MCB 410 Exam 1 UPDATED ACTUAL Questions and CORRECT
Answers
What unit of length would you generally use to measure B. micrometers
a typical plant or animal cell?
A. nanometers
B. micrometers
C. centimeters
D. millimeters
Given what you know about the differences between D. DNA replication
prokaryotic cells and eukaryotic cells, which of the
following biological processes is suitable for study using
E. coli as the model organism?
A. how mitochondria get distributed during cell division
B. protein import into the nucleus
C. formation of the endoplasmic reticulum
D. DNA replication
,The bond energies associated with noncovalent A. Many weak bonds together in a complementary geometry can afford a strong
attractions in the cell are too weak to resist disruption by binding.
thermal motion. However, cellular macromolecules can
interact specifically AND strongly with each other (or fold
by themselves) merely via such interactions. How is this
possible?
A. Many weak bonds together in a complementary
geometry can afford a strong binding.
B. The bond energies increase radically when two
interacting molecules approach each other.
C. The interacting molecules also fortify their binding via
covalent bonds to keep them from dissociation.
D. The cell lowers its internal temperature to reduce
thermal motion of molecules and enhance the weak
attractions.
Some proteins have α helices, some have β sheets, and D. hydrogen bonds between atoms along the protein backbone
still others have a combination of both. What makes it
possible for proteins to have these common structural
elements?
A. specific amino acid sequences
B. the hydrophobic-core interactions
C. side-chain interactions
D. hydrogen bonds between atoms along the protein
backbone
Lysozyme is an enzyme that specifically recognizes and C. by altering the shape of the substrate to mimic the conformation of the
hydrolyzes bacterial polysaccharides, which renders it an transition state
effective antibacterial agent. Which of the following
mechanisms best describes the manner by which
lysozyme lowers the energy required for its substrate to
reach the transition-state conformation?
A. by speeding up the rate at which water molecules
collide with the substrate
B. by modifying the sugar monomers in the
polysaccharide chain
C. by altering the shape of the substrate to mimic the
conformation of the transition state
D. by binding irreversibly to the substrate so that it cannot
dissociate
A single type of antibody: E. all of the above
A. might recognize and bind to a specific glycolipid.
B. is produced by a sub-population of B cells in
mammals.
C. is composed of two heavy chains and two light chains.
D. can itself be recognized by other antibodies.
E. all of the above
, Which of the following is a macromolecular assembly that A. ribosome
is not enclosed by an intracellular membrane?
A. ribosome
B. nucleus
C. mitochondrion
D. lysosome
E. Golgi apparatus
Referring to Figure 1-8 and the accompanying text in B. can be used to visualize large ribonucleoprotein complexes, such as
Essential Cell Biology 5th ed, electron microscopy: ribosomes.
A. has lower resolution than light microscopy.
B. can be used to visualize large ribonucleoprotein
complexes, such as ribosomes.
C. allows visualization of individual atoms within
biological macromolecules.
D. is used to observe living cells.
E. is not capable of distinguishing between mitochondria
and other organelles, such as lysosomes.
The central dogma provides a framework for thinking B. transcription;translation
about how genetic information is used to produce
structural and catalytic components of the cell.According
to the central dogma, information flows from DNA to
RNA and from RNA to protein via cellular processes
known as ___________ and ___ _.
A. translation;transport
B. transcription;translation
C. replication; translation
D. replication;transcription
Biologists cannot possibly study all living species. D. all of the above
Instead, they try to understand cell behavior by studying
a select subset of species called "model organisms."
Which of the following characteristics are useful in an
organism chosen for use as a model in laboratory
studies?
A. amenability to genetic manipulation
B. ability to grow under controlled conditions
C. rapid rate of reproduction
D. all of the above
Which of the following statements regarding microscopic B. traditional light microscopes can be used to view individual protein molecules
observation of cells is FALSE? within cells
A. ribosomes can be viewed using an electron
microscope
B. traditional light microscopes can be used to view
individual protein molecules within cells
C. electron microscopes have greater resolution than
light microscopes
D. the limit of resolution of traditional light microscopes is
approximately 200 nm
Answers
What unit of length would you generally use to measure B. micrometers
a typical plant or animal cell?
A. nanometers
B. micrometers
C. centimeters
D. millimeters
Given what you know about the differences between D. DNA replication
prokaryotic cells and eukaryotic cells, which of the
following biological processes is suitable for study using
E. coli as the model organism?
A. how mitochondria get distributed during cell division
B. protein import into the nucleus
C. formation of the endoplasmic reticulum
D. DNA replication
,The bond energies associated with noncovalent A. Many weak bonds together in a complementary geometry can afford a strong
attractions in the cell are too weak to resist disruption by binding.
thermal motion. However, cellular macromolecules can
interact specifically AND strongly with each other (or fold
by themselves) merely via such interactions. How is this
possible?
A. Many weak bonds together in a complementary
geometry can afford a strong binding.
B. The bond energies increase radically when two
interacting molecules approach each other.
C. The interacting molecules also fortify their binding via
covalent bonds to keep them from dissociation.
D. The cell lowers its internal temperature to reduce
thermal motion of molecules and enhance the weak
attractions.
Some proteins have α helices, some have β sheets, and D. hydrogen bonds between atoms along the protein backbone
still others have a combination of both. What makes it
possible for proteins to have these common structural
elements?
A. specific amino acid sequences
B. the hydrophobic-core interactions
C. side-chain interactions
D. hydrogen bonds between atoms along the protein
backbone
Lysozyme is an enzyme that specifically recognizes and C. by altering the shape of the substrate to mimic the conformation of the
hydrolyzes bacterial polysaccharides, which renders it an transition state
effective antibacterial agent. Which of the following
mechanisms best describes the manner by which
lysozyme lowers the energy required for its substrate to
reach the transition-state conformation?
A. by speeding up the rate at which water molecules
collide with the substrate
B. by modifying the sugar monomers in the
polysaccharide chain
C. by altering the shape of the substrate to mimic the
conformation of the transition state
D. by binding irreversibly to the substrate so that it cannot
dissociate
A single type of antibody: E. all of the above
A. might recognize and bind to a specific glycolipid.
B. is produced by a sub-population of B cells in
mammals.
C. is composed of two heavy chains and two light chains.
D. can itself be recognized by other antibodies.
E. all of the above
, Which of the following is a macromolecular assembly that A. ribosome
is not enclosed by an intracellular membrane?
A. ribosome
B. nucleus
C. mitochondrion
D. lysosome
E. Golgi apparatus
Referring to Figure 1-8 and the accompanying text in B. can be used to visualize large ribonucleoprotein complexes, such as
Essential Cell Biology 5th ed, electron microscopy: ribosomes.
A. has lower resolution than light microscopy.
B. can be used to visualize large ribonucleoprotein
complexes, such as ribosomes.
C. allows visualization of individual atoms within
biological macromolecules.
D. is used to observe living cells.
E. is not capable of distinguishing between mitochondria
and other organelles, such as lysosomes.
The central dogma provides a framework for thinking B. transcription;translation
about how genetic information is used to produce
structural and catalytic components of the cell.According
to the central dogma, information flows from DNA to
RNA and from RNA to protein via cellular processes
known as ___________ and ___ _.
A. translation;transport
B. transcription;translation
C. replication; translation
D. replication;transcription
Biologists cannot possibly study all living species. D. all of the above
Instead, they try to understand cell behavior by studying
a select subset of species called "model organisms."
Which of the following characteristics are useful in an
organism chosen for use as a model in laboratory
studies?
A. amenability to genetic manipulation
B. ability to grow under controlled conditions
C. rapid rate of reproduction
D. all of the above
Which of the following statements regarding microscopic B. traditional light microscopes can be used to view individual protein molecules
observation of cells is FALSE? within cells
A. ribosomes can be viewed using an electron
microscope
B. traditional light microscopes can be used to view
individual protein molecules within cells
C. electron microscopes have greater resolution than
light microscopes
D. the limit of resolution of traditional light microscopes is
approximately 200 nm
