※ 引述《pluso (*71真刚好的幸运:D)》之铭言： ※ 引述《didino86 (没事最好最好没事)》之铭言： 21.RNAs are transported through the nuclear pore complex as ribonucleoprotein complexes.Messener RNAs,sibosomal RNAs,and transfer RNAs are exported from the mucleus to function in ________ synthesis (A)polysaccharide (B)protein (C)lipid (D)DNA (E)RNA 22.Ribosome engaged in the synthesis of secreted proteins are targeted to endoplasmic reticulum by (X) at the amino terminus of the polypeptide chain. Growing polypeptide chains are then translocated into the ER through protein channls and released into the ER lumen by cleavage of the (X).X is (A)nuclear localization (B)signal sequences (C)positively charged presequences (D)amino-terminal transit peptides (E)second hydrophobic signal sequences 23. 24. 25.Which of the following organells are responsible for degradation of large particles taken up by phagocytosis and for the gradual digestion of the cell's own components by autophagy? (A)nucleus (B)ER (C)mitochondria (D)Golgi apparatus (E)lysosomes 26. 27. 28. 29.Which of the following organized around the genes for ribosomal RNAs?It is the site of rRNA transcription and processing and of ribosome.(A)nucleus (B)nucleolus (C)endoplasmic reticulum (D)Golgi apparatus (E)lysosome 30. 31. 32. 33. 34. 35. 36. 37.Which amino acid in effector PT are often phosphorylated during signal transduction.Inactivation of (X) at the end of mitosis lead re-formation of the nuclear envelope and chromosome decondensation.X is (A)Cdc2 (B)Cdk2　(C) Cdkd (D)cyclin B (E)cyclin D ps:这题没题号，记得的帮忙一下吧 ◎The plasma membrane is proposed to be a fluid phase and the attached protein can move freely.This model called (A)dynamic instability (B)treadmilling model (C)fluid mosaic model (D)induce-liy model 请爱用repost.. --

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