42. All Androgens are formed from:
(A) Proteins
(B) Tyrosine
(C) Cholesterol
(D)Small peptides
(E) Fatty acid

43. Which RNA describes below is NOT non-protein coding RNA? (A) mRNA (B) IncRNA (C) tRNA (D)SiRNA (E)rRNA

44. Which description of the difference between DNA and RNA synthesis is WRONG? (A) Both of them have active and efficient proofreading function (B) Ribonucleotides are used in RNA synthesis (C) RNA polymerase does not need primer to initiate the synthesis of RNA (D)U replaces T as the complementary base for A in RNA (E) Only portions of the genome are transcribed into RNA, whereas the cntire genome must be copied, once and only once during DNA replication

45. Which modification describes below is NOT eukaryotic RNA processing? (A) 5' capping (B) Spicing (C) 3' polyadenylation (D)Phosphorylation (E)Intron removal

46. Which transcriptional step is NOT regulated by CTD (carboxy terminal domain) phosphorylation/dephosphorylation of RNA polymerase II? (A) Promoter clearance (B) Promoter elongation (C) Promoter termination (D)mRNA process (E)Promoter initiation

47. Which one of the following descriptions as to chromatin is WRONG? (A) Transcriptionally inactive chromatin is densely packed during interphase (B) Transcriptionally active chromatin stains less densely and is referred to as heterochromatin (C) Constitutive heterochromatin is found in the regions near the chromosomal centromere and at chromosomal ends (D) Facultative heterochromatin is at times condensed, but at other times it is actively transcribed (E)None of them

48. The structure above is: (A) UTP (B) dATP (C) GTP (D)dCTP (E)All are wrong

49. Which one of the following subunits is NOT contained in the basic DNA-dependent RNA polymerase of the bacterium Escherichia coll? (A) αsubunit (B) β subunit (C)ω subunit (D)σsubunit (E) None of them

複選題50. Which one of the following statements as to TATA box is RIGHT? (A) A six-nucleotide-pair A+T-rich sequence about 35 nucleotides upstream of the transcription start site in bacterial promotcrs (B) It is usually iocated 10-15 bp upstream from the transcription start site in mammalian genes (C) The human TATA box is bound by the 34 kDa TATA-binding protein, a subunit in TFIID (D) All eukaryotic mRNA-encoding genes possess a consensus TATA box (E)All are right

1. Pregnant w women often use a antidepressants, despite Iimited available information regarding individual antidepressants and specific birth defect risks. Which one had the greatest proportion of elevated birth defect risks? (A) Venlafaxine (B) Escitalopram (C) Fluoxetine (D) Paroxetine

2. After kidney transplant, which of the following imm nunosuppressive therapies should be avoided during pregnancy and discontinued at least 6 weeks before pregnancy? (A) Azathioprine (B) Mycophenolate mofetil (C) Cyclosporine (D) Sirolimus

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