30. The black dot in the complex marked in number 4 should be:
(A) Aggrecan
(B)> Link protein
(C) CD44
(D) Spike protein
(E)integrin

31. The process by which ATP is formed directly in glycolysis is: (A) ATP hydrolysis (B) oxidative phosphorylation (C) isomerization (D) substrate-level phosphorylation (E)none of the above

32. Amylose is different from amylopectin because: (A) it is composed of glucose residues (B) it has more glucose residues (C) it is highly branched (D)it is unbranched (E)it contains no three-dimensional structure

33. In most tissues, an increase in the following ratio directly causes a decrease in TCA cycle activity: (A) FAD/FADH2 (B) ADP/ATP (C) GDP/GTP (D)NADH/NAD+ (E) none of the above

34. The regulation of the glycolytic pathway involves: (A) feedback inhibition by ATP (B) allosteric inhibition by ATP (C) allosteric stimulation by ADP (D)all three are correct (E) none of the above

35. For translation initiation, eukaryotes do NOT require: (A) 7-ethyl GTP cap at 5' end of mRNA (B) Start codon (C) elF-2-GTP (D)poly( A ) tail at 3' end of mRNA (E)Shine-Dalgarno sequence

36. In translation clongation, which molecule binds incoming aminoacyl-tRNA for loading it to A site: (A) EF-Tu (B) EF-Ts (C) EF-G (D)myosin (E)importin

37. A silent mutation at the protein-coding region of genome will cause: (A) protein degradation (B) early termination of protein synthesis (C) amino acid change (D)protein targeting error (E)none of above

38. Which molecule is NOT required for peptide bond formation at ribosome? (A) rRNA (B) aminoacyl-tRNA (C) ribosomal large subunit (D)ATP (E)all of above are required

39. G protein is active when: (A) GDP replaces GTP (B) It is bound by its ligand and transported to the nucleus (C) GTP is bound to it (D)It is phosphorylated by protein kinase (E) Ca2+ binds to a protein-linked receptor

40. The cholera toxin does not allow GTP to be hydrolyzed to GDP. What effects of cholera toxin would you expect to see in the cell? (A) The inactivation of ligand-gated ion channels (B) The inactivation of G-protein linked signaling pathways (C) The activated G proteins would remain locked in the "on" position, transmitting signal even in the absence of signaling molecule (D)All of the cAMP would be used up (E)All of above

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