Quiz
TEST 2 ANATOMY
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Perguntas do quiz (23)
11) Which of the following is true regarding the generation of a membrane potential?
- AA) Both potassium and sodium ions can ʺleakʺ through the cell membrane due to diffusion.
- BC) The maintenance of the potential is based exclusively on diffusion processes.
- CB) In the polarized state, sodium and potassium ion concentrations are in static equilibrium.
- DD) When the sodium-potassium pump is activated, potassium is pumped into the cell twice
as fast as the sodium is pumped out, thus causing the membrane potential.
2Transcytosis is ________.
- AA) combining an endosome with a lysosome and degrading or releasing the contents
- BB) transporting an endosome from one side of a cell to the other and releasing the contents
by exocytosis - CC) recycling the contents of the endosome back to the surface of the cell
- DD) storing the contents of the endosome.
33) in certain kinds of muscle cells, calcium ions are stored ________.
- AA) in the smooth ER
- BB) in the rough ER
- CC) in both smooth and rough ER
44) The RNA responsible for bringing the amino acids to the ʺfactoryʺ site for protein formation is
the ________.- AA) rRNA
- BB) mRNA
- CC) tRNA
55) A red blood cell placed in pure water would ________.
- AA) shrink
- BD) swell and burst
- CB) swell initially, then shrink as equilibrium is reached
66) The plasma membrane is ________.
- Aa single-layered membrane that surrounds the nucleus of the cell
- Bthe phospholipid bilayer surrounding the cell
- Ca double layer of protein enclosing the plasma
77) Which of these is not a function of the plasma membrane?
- AIt is selectively permeable.
- BIt prevents potassium ions from leaking out and sodium ions from crossing into the cell.
- CIt acts as a site of cell-to-cell interaction and recognition.
88) Which structures are fingerlike projections that greatly increase the absorbing surface of cells?
- AA) The rate of diffusion is independent of temperature.
- BB) The greater the concentration of gradient, the faster the rate of diffusion.
- CC) Molecular weight of a substance does not affect the rate of diffusion.
- DD) The lower the temperature, the faster the diffusion rate.
9Cell junctions that promote the coordinated activity of cells by physically binding them
together into a cell community include all of the following except ________.- AA) gap junctions
- BB) desmosomes
- CC) peroxisomes
- DD) tight junctions
10Which of the following statements is correct regarding diffusion?
- AA) The rate of diffusion is independent of temperature.
- BB) The greater the concentration of gradient, the faster the rate of diffusion.
- CC) Molecular weight of a substance does not affect the rate of diffusion.
- DD) The lower the temperature, the faster the diffusion rate.
11If cells are placed in a hypertonic solution containing a solute to which the membrane is
impermeable, what could happen?- AA) The cells will swell and ultimately burst.
- BB) The cells will lose water and shrink.
- CC) The cells will shrink at first, but will later reach equilibrium with the surrounding solution and return to their original condition.
- DD) The cells will show no change due to diffusion of both solute and solvent.
12Which of the following is not a subcellular structure?
- AA) intercellular material
- BB) membranes
- CC) cytoplasm
- DD) organelles
13Once solid material is phagocytized and taken into a vacuole, which of the following
statements best describes what happens?- AA ribosome enters the vacuole and uses the amino acids in the ʺinvaderʺ to form new
protein. - BA lysosome combines with the vacuole and digests the enclosed solid material.
- CThe vacuole remains separated from the cytoplasm and the solid material persists
unchanged. - DNitrogen enters the vacuole and ʺburnsʺ the enclosed solid material.
- AA ribosome enters the vacuole and uses the amino acids in the ʺinvaderʺ to form new
14Which of the following is a function of a plasma membrane protein?
- Acirculating antibody
- Bmolecular transport through the membrane
- Cforms a lipid bilayer
- Doxygen transport
15Which of the following statements is correct regarding RNA?
- AMessenger RNA, transfer RNA, and ribosomal RNA play a role in protein synthesis.
- BIf the base sequence of DNA is ATTGCA, the messenger RNA template will be
UCCAGU. - CThere is exactly one specific type of mRNA for each amino acid.
- DrRNA is always attached to the rough ER.
16Which of the following would not be a constituent of a plasma membrane?
- Aglycolipids
- Bmessenger RNA
- Cglycoproteins
- Dphospholipids
17Mitosis ________.
- Ais the formation of sex cells
- Bproduces nucleus replication
- Ccreates diversity in genetic potential
- Dalways results in division of a cell
18Riboswitches are folded RNAs that act as switches to turn protein synthesis on or off in
response to _________.- Achanges in the environment
- Bspecific tRNAs
- Cspecific codes from the DNA
- Dpresence or absence of ubiquitins
19The electron microscope has revealed that one of the components within the cell consists of
microtubules arranged to form a hollow tube. This structure is ________.- Acentrosome
- Bcentriole
- Cchromosome
- Dribosome
20Which of these is an inclusion, not an organelle?
- Amelanin
- Blysosome
- Cmicrotubule
- Dcilia
21Sugars can be transported into cells against their concentration gradient because of
- Aosmosis
- Bsimple diffusion.
- Cfacilitated diffusion.
- Dantiport with Na+.
- Esymport with Na +.
22Which of the following is an example of antiport?
- Asimultaneous movement of an amino acid and protons into the cell
- Bsimultaneous movement of an amino acid and protons out of the cell
- Ccoupling of the inward movement of water with the outward movement of protons
- Dcoupling of the inward movement of Na+ with the outward movement of Ca ++
- Enone of the above.
23Both symport and antiport require transport proteins.
- AVerdadeiro
- BFalso
Informações
- Descrição
- ANATOMY EXAM 2 Quiz sobre TEST 2 ANATOMY, criado por Yan Taco em 23-10-2016.
- Autor
- Yan Taco
- Idioma
- English
- Visualizações
- 2
- Etiquetas
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