生物试题练习题教案学案课件细胞生物学英文试卷二(开卷).doc

细胞生物学英文试卷二（开卷）Each question has one correct answer only!1. Which of the following about apoptosis is not true? A.Is a sort of cellular self-destruction that takes place in normal tissues.B.Is accompanied by random DNA degradation.C.Is characterized by nuclear fragmentation and cellular breakdown into vesicles. D.Differs from necrosis because necrosis occurs when cell is injured. 2. Which of the following mutations in a proto-oncogene will most likely not result in cancer? A.Gene deletion.B.Gene translocation to the downstream of an active gene locus.C.Gene amplification.D.Insertion of the viral gene. 3. Cancer A.Is due to a loss of growth control by somatic cells.B.can arise from various cell types.C.Is caused by gene mutations of somatic cells.D.All of the above. 4. At anaphase A A.Microtubules shorten at kinetochore.B.Motor proteins pull chromosomes towards pole.C.Two poles begin to separate from each others.D.Both A and B. 5. Mitosis phase at which chromosome arranged on equatorial plane is called A.Prophase.B.Metaphase.C.Anaphase.D.Telophase. 6. Microtubules attach to the chromosomes during mitosis by which structure? A.Centrosome.B.Kinetochore.C.Telomere.D.Both B and C. 7. Eukaryotic chromosomes contain two general domains which relate to the degree of condensation. These two regions are A.Uniform in the genetic information they contain.B.Called heterochromatin and euchromatin.C.Separated by large stretches of repetitive DNA.D.Both A and B 8. What is the function of the nucleolus? A.It is pore for nuclear entry of large proteins.B.It is a site of attachment for chromosomes on the nuclear matrix.C.It is a site where unexpressed DNA is concentrated.D.It is a nuclear domain involved in ribosome assembly. 9. Chromatin consist of A.DNA, RNA and proteins.B.DNA and proteins.C.DNA, histone and nonhistone.D.DNA, RNA A BCD EF 10. Which of the following ECM are found in basal laminae?A.Type IV collagen.B.Desmoglein.C.Laminin.D.Both A and C. 11. Which of the following cytoskeleton structures links to desmosomes and hemidesmosomes? A.Microtubules.B.Intermediate filaments.C.Microfilaments.D.all of the above. 12. Which of the following does NOT describe intermediate filaments? A.Are always homodimers.B.Can attach at desmosomes or hemidesmosomes.C.Contain coiled-coils.D.Phosphorylation can regulate disassembly. 13. Which of the following protein structures has the smallest diameter? A.Microtubules.B.Intermediate filaments.C.Microfilaments.D.Flagella. 14. Microtubule associated motor proteins are A.Myosin I B.KinesinC.DyneinD.Both B and C 15. Dyneins are motor proteins that move from_along_A.end to +end; microtubules.B.+end to end; microtubules.C.end to +end; microfilaments.D.+end to end; microfilaments. 16. In RPTK-ras signal pathway, ras A.Is a monomeric G protein.B.Is activated by RPTK.C.Trigger a kinase cascade and finally activate MAPK.D.All of the above. 17. The ligand of receptor protein tyrosine kinases (RPTK) are A.Sterol hormone.B.Neurotransmitter.C.NOD.Growth factors such as EGF, PDEF and so on. 18. The protein kinase activated by _ is termed PKC.A.cAMP.B.cGMP.C.DG (diacylglycerol).D.IP3. 19. Cyclic photophosphorylation is accomplished by A.Photosystem I.B.Photosystem II.C.Photosystem III.D.Both photosystems I and II. 20. The inner folded membranes of chloroplasts are called A.Cristae.B.Thylakoids.C.Golgi body.D.Endoplasmic reticulum. 21. Which of the following does not function as a proton pump in mitochondrion inner membrane? A.Complex IB.Complex IIC.Complex IIID.Complex IV 22. Isolated F1 particle have ATPase activity shows that A.Electron transport requires energy.B.The enzymatic activity of F1 particle is reversible.C.Electron transport is still going on.D.The only function of F1 particle is to hydrolyze ATP 23. Which of the following about peroxisomes is true A.They are formed by binary fission of existing peroxisomes.B.They contain their own DNA.C.They contain oxidative enzymes.D.Both A and C 24. A SNARE is A.Any soluble protein present within vesicles.B.An integral protein that selects specific cargo proteins.C.An integral protein in the nuclear membrane.D.An integral protein that functions to help vesicles dock to target membranes. 25. Which of the following is NOT part of the endomembrane system? A.Golgi complex.B.Microtubule.C.Smooth endoplasmic reticulum.D.Lysosome. 26. Proteins move to lysosomes are A.Labeled by mannose-6-phosphate (M6P).B.With a signal patch.C.Coated by clathrin.D.All of the above 27. Cis, medial and trans specify different compartments of the.A.Golgi body.B.Endoplasmic reticulum.C.Mitochondrion.D.Nucleus. 28. Lysosome function to A.Recycle cellular material and digest material taken in from the extracellular environment.B.Synthesize various celluar macromolecules.C.Ingest nutrition.D.Carry out digestion of all cytoplasmic components. 29. Which of the following is most likely to cross a cell membrane by simple diffusion? A.CO2.B.Amino acid.C.Protein.D.Na+. 30. The Na+/K+ pump A.moves 3 K+ in and 2 Na+ out each cycle.B.moves 2 K+ in and 3 Na+ out each cycle.C.moves 3 K+ in and 3 Na+ out each cycle.D.moves 2 K+ in and 2 Na+ out each cycle. 31. In human intestine glucose are absorbed by the way of A.Na+ powered antiport.B.Na+ powered symport.C.Channel proteins.D.ABC transporter. 32. Human red blood cells are the ideal materials to study the cell membrane structures because A.Red blood cells can be easily identified by their color.B.Red blood cells are available in large number.C.Red blood cells have no nucleus and organelles.D.Both B and C. 33. The observation that plasma membrane protein mix after cell fusion provides evidence for A.Rotational movement of plasma membrane protein.B.The bilayer structure of biomembranes.C.The fluid mosaic model.D.Interaction between the plasma membrane proteins from two different cell types 34. Proteins that span the cell membrane are called A.Anchored proteins.B.Peripheral proteins.C.Integral proteins.D.None of the above. 35. Which of the following description about prion in not true? A.Prion is a sort of protein that causing some severe diseases, such as bovine sponge-form encephalopathies (BSM, mad cow disease). B.Prion can replicate itself by change the conformation of the proteins which are similar to prion.C.Prion is a transcription regulatory protein.D.Prion was discovered by Prusiner in 1982. 36. Ribozyme are A.Ribosomal proteins.B.Catalytic RNA.C.Enzyme for the synthesis of ribosome.D.Carbohydrate polymers. 37. The resolution of a transmission e