17981314
Descrição
Quiz por Deana Heitkamp, atualizado more than 1 year ago
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Criado por Deana Heitkamp
mais de 5 anos atrás
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Questão 1
Questão
What happens to the membrane portion of a vesicle after it fuses with the plasma membrane and releases its contents during exocytosis?
Responda
-
it becomes part of the plasma membrane
-
it is ejected from the cell
-
it is transported to another cell
-
it is digested by lysosomes
Questão 2
Questão
Osmosis is the movement of water
Responda
-
across extracellular space
-
from a large volume to a small volume
-
throughout the cytoplasm
-
from a compartment with a high concentration of water to one with low concentration of water
-
from a region with a low concentration of water to one with a high concentration of water
Questão 3
Questão
Which of the following is/are directly involved in the movement of flagella and cilia?
Responda
-
molecular motors
-
microtubules
-
ribosomes
-
molecular motors and microtubules
-
motors, microtubules, and ribosomes
Questão 4
Questão
Which of the following links the extracellular matrix to the cytoskeleton?
Responda
-
cholesterol molecules
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transport proteins
-
actin filaments
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microtubules
-
integrin proteins
Questão 5
Questão
Which of the following would most likely affect the rate of simple diffusion?
Responda
-
temperature
-
hydroxide ion concentration
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isomerization
-
pH
Questão 6
Questão
Biological membranes are composed of
Responda
-
Phospholipids
-
protein
-
nucleic acid
-
phopholipids and proteins
-
phopholipids, proteins, and nucleic acids
Questão 7
Questão
A red blood cell placed in a hypertonic solution will
Responda
-
change color
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move to a isotonic solution by diffusion
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expand and possibly explode
-
stay the same shape
-
shrivel up
Questão 8
Questão
Nucelar pores are functionally important because they facilitate
Responda
-
endocytosis
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protein synthesis
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transcription of mRNA
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the movement of mRNA molecules form the nucleus into the cytoplasm
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exocytosis
Questão 9
Questão
Membrane ion channels are an example of
Responda
-
co-transport
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active transport
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ion exchangers
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facilitated diffusion
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carrier transport
Questão 10
Questão
Which of the following allow for the exchange of various molecules between plant cells?
Responda
-
xylem
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gap junctions
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tight junctions
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plasmodesmata
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desmosomes
Questão 11
Questão
Which of the following are found within both mitochondria and chloroplasts?
Responda
-
DNA
-
ribosomes
-
centrosomes
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DNA and ribosomes
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DNA, ribosomes, and centrosomes
Questão 12
Questão
The release of a neurotransmitter at a synapse is an example of
Responda
-
phagocytosis
-
exocytosis
-
receptor-mediated endocytosis
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pinocytosis
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endocytosis
Questão 13
Questão
The energy for active transport comes from
Responda
-
cytoskeleton
-
ATP
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pH
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heat
Questão 14
Questão
Which transport mechanism is capable of bringing an entire cell into another, and most likely larger, cell?
Responda
-
receptor-mediated endocytosis
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phagocytosis
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co-transport
-
pinocytosis
Questão 15
Questão
Plasma membrane integral proteins may be anchored in place by
Responda
-
cytoskeletal proteins
-
unsaturated phospholipids
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cholesterol molecules
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saturated phospholipids
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glycoproteins
Questão 16
Questão
When a plant cell is exposed to an extracellular solution that is hypotonic, what part of the cell keeps it from rupturing?
Responda
-
chloroplasts
-
cell wall
-
plasma membrane
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mitochondria
-
central vacuole
Questão 17
Questão
Water cannot flow across phospholipid bilayers by simple diffusion because
Responda
-
phosphate groups within the core of the membrane repel water molecules
-
fatty acids are too viscous
-
the concentration of water is always the same inside and outside of a cell
-
the fatty tails within the core of the membrane is hydrophobic
-
water molecules are attracted and bind to the polar head groups
Questão 18
Questão
A white blood cell can ingest a bacterial cell by the process of
Responda
-
receptor mediated hydrolysis
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halitosis
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exocytosis
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pinocytosis
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phagocytosis
Questão 19
Questão
Microtubules are important for
Responda
-
the structure of flagella and cilia
-
centriole structure
-
the movement of ions across the plasma membrane
-
structure of flagella and cilia and centriole
-
structure of flagella and cilia and centriole and movement of ions
Questão 20
Questão
A co-transporter membrane protein, for example the sodium-glucose transporter, typically uses which of the following to move molecules across the plasma membrane?
Responda
-
molecular motors
-
hydrolysis
-
glycosylation
-
ion gradients
Questão 21
Questão
A major function of the smooth endoplasmic reticulum is
Responda
-
synthesize proteins destined for secretion
-
synthesize soluble proteins
-
sequestration and release of calcium ions
-
synthesize integral membrane proteins
-
protein modification
Questão 22
Questão
The major function of the mitochondria is to synthesize
Responda
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ATP
-
proteins
-
nucleic acids
-
organic compounds
-
glucose
Questão 23
Questão
Which of the following directly require ATP hydrolysis to function?
Responda
-
Na/K ATPase
-
molecular motors
-
ion channels
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Na/K ATPase and molecular motors
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all
Questão 24
Questão
The sodium/potassium ATPase is considered electrogenic because
Responda
-
it produces an electrical potential across the plamsa membrane
-
hydrolysis of ATP results in the release of negatively charged inorganic phosphate molecules
-
it requires the presence of a membrane potential for its normal function
-
an electrical potential is required for ATP synthesis
Questão 25
Questão
Which of the following allows for the exchange of ions between animal cells?
Responda
-
tight junctions
-
plasmodesmata
-
xylem
-
gap junctions
-
desmosomes
Questão 26
Questão
Which characteristic of phospholipids contributes to the fluidity of the membrane?
Responda
-
the size of the polar head group
-
the type of extracellular sugar molecules attached to the protein
-
the number of peptide bonds
-
the relative composition of saturated and unsaturated fatty acids
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pH
Questão 27
Questão
In what way does receptor-mediated endocytosis differ from phagocytosis?
Responda
-
it does not invovle vesicle formation
-
in transports only fluid
-
phagocytosis can also expel substances from a cell
-
it brings into the cell only specifically targeted substances
Questão 28
Questão
The function of the rough endoplasmic reticulum is to
Responda
-
synthesize soluble proteins
-
synthesize integral membrane proteins
-
synthesize proteins destined for secretion
-
synthesize integral membrane proteins and proteins destined for secretion
-
synthesize soluble, integral membrane, and secretion proteins
Questão 29
Questão
Tight junctions
Responda
-
allow for the transfer of water and ions between animal cells
-
facilitate the diffusion of ions into and out of animal cells
-
facilitate the diffusion of ions into and out of plant cells
-
prevent solution/fluid from moving between the plasma membranes of two animal cells
Questão 30
Questão
The plant cell wall is mostly composed of
Responda
-
glycagon
-
amylose
-
cellulose
-
glycogen
-
amylopectin
Questão 31
Questão
Which organelle contains digestive enzymes?
Responda
-
Smooth ER
-
lysosome
-
Golgi apparatus
-
Rough ER
-
mitochondria
Questão 32
Questão
Chromatin within the nucleus of a cell contains
Responda
-
DNA
-
histone proteins
-
RNA
-
DNA and histone proteins
-
DNA, histone proteins, and RNA
Questão 33
Questão
Which of the following is/are examples of "bulk transport"?
Responda
-
pinocytosis
-
phagocytosis
-
receptor-mediated endocytosis
-
All of the above
Questão 34
Questão
Portions of an integral membrane protein that typically pass through biological membranes are in the form of
Responda
-
a 9+2 microtubule arrangement
-
alpha helices with polar side chains
-
alpha helices with mostly non-polar side chains
-
beta-pleated sheets with polar side chains
-
complex, three dimensional shapes
Questão 35
Questão
How do gasses move through plasma membranes?
Responda
-
co-transport
-
aquaporins
-
ion channels
-
simple diffusion
Questão 36
Questão
The core of a phospholipid bilayer is
Responda
-
anthropomorhpic
-
polarized
-
hydrophilic
-
amphipathic
-
hydrophobic
Questão 37
Questão
Proteins are transported between the cistern of the Golgi apparatus by
Responda
-
intermediate filaments attached to the cis face
-
vesicles
-
microfilaments
-
microtubules
-
molecular motors
Questão 38
Questão
Free ribosomes within the cytoplasm
Responda
-
synthesize soluble mRNA molecules
-
synthesize proteins destined for secretion
-
synthesize integral membrane proteins
-
synthesize soluble proteins
Questão 39
Questão
The nuclear envelope is notable because it
Responda
-
lacks phospholipids
-
is constructed with DNA
-
lacks integral membrane proteins
-
is a double membrane
Questão 40
Questão
How does the sodium/potassium ATPase make the inside of a cell negatively charged?
Responda
-
by pumping more sodium ions out of the cell than pumping potassium ions into the cell
-
by pumping into the cell a large number of anions
-
by pumping an equal number of ions in and out of the cell
-
by pumping out anions
Questão 41
Questão
Simple diffusion is best characterized by
Responda
-
the passive movement of a particle from a region of high concentration to low concentration
-
the active transfer of a particle from a region of low concentration to high
-
the passive movement of a particle from a region of low concentration to high
-
the equilibrium state occurring between two compartments of equal concentration
Questão 42
Questão
Photosynthesis is performed in which of the following organelles?
Responda
-
mitochondria
-
Rough ER
-
christae
-
Golgi apparatus
-
chloroplasts
Questão 43
Questão
Which of the following intracellular structures most likely contributes to the mechanisms of endocytosis and exocytosis?
Responda
-
Golgi apparatus
-
nucleolus
-
ribosomes
-
chloroplasts
-
cytoskeleton
Questão 44
Questão
Phosphorylation of the sodium/potassium pump by ATP hydrolysis
Responda
-
underlies the pumping of Na and K ions by electrostatic repulsion
-
activates molecular motors
-
changes the shape/confirmation of the protein, permitting the pumping cycle to move forward
-
increases the viscosity of the local phospholipid bilayer
-
attracts Na and k ions to their respective binding sites
Questão 45
Questão
Which of the following is not part of the endomembrane system?
Responda
-
Rough ER
-
plasma membrane
-
nucleus
-
cholorplast
-
Golgi apparatus
Questão 46
Questão
Sheets of animal cells are held together by
Responda
-
gap junctions
-
desmosomes
-
fibronectin
-
plasmodesmata
-
integrins
Questão 47
Questão
Where in a eukaryotic cell would polysaccharides most likely be added to a newly synthesized protein?
Responda
-
mitochondria
-
Smooth ER
-
Rough ER
-
ribosomes
-
Golgi apparatus
Questão 48
Questão
Which of the following are found in a typical bacterial cell?
Responda
-
ribosomes
-
mitochondria
-
cell wall
-
ribosomes and cell wall
-
ribosomes, mitochondria, and cell wall
Questão 49
Questão
Active transport of sodium and potassium ions out of and into a cell, respectively, requires
Responda
-
hydrolysis of ATP
-
movement of phospholipids across the plasma membrane
-
phosphorylation of ATP
-
ATP synthesis
-
the presence of a membrane potential
Questão 50
Questão
Which of the following is an example of facilitated diffusion?
Responda
-
transfer of gases from the extracellular space into the cytoplasm
-
movement of carbon dioxide across the plasma membrane
-
efflux of sodium and the influx of potassium by the Na/K ATPase
-
carrier transport of glucose
-
proton pump extrusion of hydrogen ions
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