Quiz
Exam 2
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Fragen in diesem Quiz (50)
1What happens to the membrane portion of a vesicle after it fuses with the plasma membrane and releases its contents during exocytosis?
- Ait becomes part of the plasma membrane
- Bit is ejected from the cell
- Cit is transported to another cell
- Dit is digested by lysosomes
2Osmosis is the movement of water
- Aacross extracellular space
- Bfrom a large volume to a small volume
- Cthroughout the cytoplasm
- Dfrom a compartment with a high concentration of water to one with low concentration of water
- Efrom a region with a low concentration of water to one with a high concentration of water
3Which of the following is/are directly involved in the movement of flagella and cilia?
- Amolecular motors
- Bmicrotubules
- Cribosomes
- Dmolecular motors and microtubules
- Emotors, microtubules, and ribosomes
4Which of the following links the extracellular matrix to the cytoskeleton?
- Acholesterol molecules
- Btransport proteins
- Cactin filaments
- Dmicrotubules
- Eintegrin proteins
5Which of the following would most likely affect the rate of simple diffusion?
- Atemperature
- Bhydroxide ion concentration
- Cisomerization
- DpH
6Biological membranes are composed of
- APhospholipids
- Bprotein
- Cnucleic acid
- Dphopholipids and proteins
- Ephopholipids, proteins, and nucleic acids
7A red blood cell placed in a hypertonic solution will
- Achange color
- Bmove to a isotonic solution by diffusion
- Cexpand and possibly explode
- Dstay the same shape
- Eshrivel up
8Nucelar pores are functionally important because they facilitate
- Aendocytosis
- Bprotein synthesis
- Ctranscription of mRNA
- Dthe movement of mRNA molecules form the nucleus into the cytoplasm
- Eexocytosis
9Membrane ion channels are an example of
- Aco-transport
- Bactive transport
- Cion exchangers
- Dfacilitated diffusion
- Ecarrier transport
10Which of the following allow for the exchange of various molecules between plant cells?
- Axylem
- Bgap junctions
- Ctight junctions
- Dplasmodesmata
- Edesmosomes
11Which of the following are found within both mitochondria and chloroplasts?
- ADNA
- Bribosomes
- Ccentrosomes
- DDNA and ribosomes
- EDNA, ribosomes, and centrosomes
12The release of a neurotransmitter at a synapse is an example of
- Aphagocytosis
- Bexocytosis
- Creceptor-mediated endocytosis
- Dpinocytosis
- Eendocytosis
13The energy for active transport comes from
- Acytoskeleton
- BATP
- CpH
- Dheat
14Which transport mechanism is capable of bringing an entire cell into another, and most likely larger, cell?
- Areceptor-mediated endocytosis
- Bphagocytosis
- Cco-transport
- Dpinocytosis
15Plasma membrane integral proteins may be anchored in place by
- Acytoskeletal proteins
- Bunsaturated phospholipids
- Ccholesterol molecules
- Dsaturated phospholipids
- Eglycoproteins
16When a plant cell is exposed to an extracellular solution that is hypotonic, what part of the cell keeps it from rupturing?
- Achloroplasts
- Bcell wall
- Cplasma membrane
- Dmitochondria
- Ecentral vacuole
17Water cannot flow across phospholipid bilayers by simple diffusion because
- Aphosphate groups within the core of the membrane repel water molecules
- Bfatty acids are too viscous
- Cthe concentration of water is always the same inside and outside of a cell
- Dthe fatty tails within the core of the membrane is hydrophobic
- Ewater molecules are attracted and bind to the polar head groups
18A white blood cell can ingest a bacterial cell by the process of
- Areceptor mediated hydrolysis
- Bhalitosis
- Cexocytosis
- Dpinocytosis
- Ephagocytosis
19Microtubules are important for
- Athe structure of flagella and cilia
- Bcentriole structure
- Cthe movement of ions across the plasma membrane
- Dstructure of flagella and cilia and centriole
- Estructure of flagella and cilia and centriole and movement of ions
20A co-transporter membrane protein, for example the sodium-glucose transporter, typically uses which of the following to move molecules across the plasma membrane?
- Amolecular motors
- Bhydrolysis
- Cglycosylation
- Dion gradients
21A major function of the smooth endoplasmic reticulum is
- Asynthesize proteins destined for secretion
- Bsynthesize soluble proteins
- Csequestration and release of calcium ions
- Dsynthesize integral membrane proteins
- Eprotein modification
22The major function of the mitochondria is to synthesize
- AATP
- Bproteins
- Cnucleic acids
- Dorganic compounds
- Eglucose
23Which of the following directly require ATP hydrolysis to function?
- ANa/K ATPase
- Bmolecular motors
- Cion channels
- DNa/K ATPase and molecular motors
- Eall
24The sodium/potassium ATPase is considered electrogenic because
- Ait produces an electrical potential across the plamsa membrane
- Bhydrolysis of ATP results in the release of negatively charged inorganic phosphate molecules
- Cit requires the presence of a membrane potential for its normal function
- Dan electrical potential is required for ATP synthesis
25Which of the following allows for the exchange of ions between animal cells?
- Atight junctions
- Bplasmodesmata
- Cxylem
- Dgap junctions
- Edesmosomes
26Which characteristic of phospholipids contributes to the fluidity of the membrane?
- Athe size of the polar head group
- Bthe type of extracellular sugar molecules attached to the protein
- Cthe number of peptide bonds
- Dthe relative composition of saturated and unsaturated fatty acids
- EpH
27In what way does receptor-mediated endocytosis differ from phagocytosis?
- Ait does not invovle vesicle formation
- Bin transports only fluid
- Cphagocytosis can also expel substances from a cell
- Dit brings into the cell only specifically targeted substances
28The function of the rough endoplasmic reticulum is to
- Asynthesize soluble proteins
- Bsynthesize integral membrane proteins
- Csynthesize proteins destined for secretion
- Dsynthesize integral membrane proteins and proteins destined for secretion
- Esynthesize soluble, integral membrane, and secretion proteins
29Tight junctions
- Aallow for the transfer of water and ions between animal cells
- Bfacilitate the diffusion of ions into and out of animal cells
- Cfacilitate the diffusion of ions into and out of plant cells
- Dprevent solution/fluid from moving between the plasma membranes of two animal cells
30The plant cell wall is mostly composed of
- Aglycagon
- Bamylose
- Ccellulose
- Dglycogen
- Eamylopectin
31Which organelle contains digestive enzymes?
- ASmooth ER
- Blysosome
- CGolgi apparatus
- DRough ER
- Emitochondria
32Chromatin within the nucleus of a cell contains
- ADNA
- Bhistone proteins
- CRNA
- DDNA and histone proteins
- EDNA, histone proteins, and RNA
33Which of the following is/are examples of "bulk transport"?
- Apinocytosis
- Bphagocytosis
- Creceptor-mediated endocytosis
- DAll of the above
34Portions of an integral membrane protein that typically pass through biological membranes are in the form of
- Aa 9+2 microtubule arrangement
- Balpha helices with polar side chains
- Calpha helices with mostly non-polar side chains
- Dbeta-pleated sheets with polar side chains
- Ecomplex, three dimensional shapes
35How do gasses move through plasma membranes?
- Aco-transport
- Baquaporins
- Cion channels
- Dsimple diffusion
36The core of a phospholipid bilayer is
- Aanthropomorhpic
- Bpolarized
- Chydrophilic
- Damphipathic
- Ehydrophobic
37Proteins are transported between the cistern of the Golgi apparatus by
- Aintermediate filaments attached to the cis face
- Bvesicles
- Cmicrofilaments
- Dmicrotubules
- Emolecular motors
38Free ribosomes within the cytoplasm
- Asynthesize soluble mRNA molecules
- Bsynthesize proteins destined for secretion
- Csynthesize integral membrane proteins
- Dsynthesize soluble proteins
39The nuclear envelope is notable because it
- Alacks phospholipids
- Bis constructed with DNA
- Clacks integral membrane proteins
- Dis a double membrane
40How does the sodium/potassium ATPase make the inside of a cell negatively charged?
- Aby pumping more sodium ions out of the cell than pumping potassium ions into the cell
- Bby pumping into the cell a large number of anions
- Cby pumping an equal number of ions in and out of the cell
- Dby pumping out anions
41Simple diffusion is best characterized by
- Athe passive movement of a particle from a region of high concentration to low concentration
- Bthe active transfer of a particle from a region of low concentration to high
- Cthe passive movement of a particle from a region of low concentration to high
- Dthe equilibrium state occurring between two compartments of equal concentration
42Photosynthesis is performed in which of the following organelles?
- Amitochondria
- BRough ER
- Cchristae
- DGolgi apparatus
- Echloroplasts
43Which of the following intracellular structures most likely contributes to the mechanisms of endocytosis and exocytosis?
- AGolgi apparatus
- Bnucleolus
- Cribosomes
- Dchloroplasts
- Ecytoskeleton
44Phosphorylation of the sodium/potassium pump by ATP hydrolysis
- Aunderlies the pumping of Na and K ions by electrostatic repulsion
- Bactivates molecular motors
- Cchanges the shape/confirmation of the protein, permitting the pumping cycle to move forward
- Dincreases the viscosity of the local phospholipid bilayer
- Eattracts Na and k ions to their respective binding sites
45Which of the following is not part of the endomembrane system?
- ARough ER
- Bplasma membrane
- Cnucleus
- Dcholorplast
- EGolgi apparatus
46Sheets of animal cells are held together by
- Agap junctions
- Bdesmosomes
- Cfibronectin
- Dplasmodesmata
- Eintegrins
47Where in a eukaryotic cell would polysaccharides most likely be added to a newly synthesized protein?
- Amitochondria
- BSmooth ER
- CRough ER
- Dribosomes
- EGolgi apparatus
48Which of the following are found in a typical bacterial cell?
- Aribosomes
- Bmitochondria
- Ccell wall
- Dribosomes and cell wall
- Eribosomes, mitochondria, and cell wall
49Active transport of sodium and potassium ions out of and into a cell, respectively, requires
- Ahydrolysis of ATP
- Bmovement of phospholipids across the plasma membrane
- Cphosphorylation of ATP
- DATP synthesis
- Ethe presence of a membrane potential
50Which of the following is an example of facilitated diffusion?
- Atransfer of gases from the extracellular space into the cytoplasm
- Bmovement of carbon dioxide across the plasma membrane
- Cefflux of sodium and the influx of potassium by the Na/K ATPase
- Dcarrier transport of glucose
- Eproton pump extrusion of hydrogen ions
Informationen
- Beschreibung
- Chapter 4 and 5
- Autor
- Deana Heitkamp
- Sprache
- English
- Aufrufe
- 34
- Schlagwörter
- Bewertung
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