Question 30 Which of the following statements about transcription initiation is correct? the efficiency of transcription initiation is regulated by the promoter sequence transcription initiation requires initiation factors IF1, IF2 and IF3 specific recruitment of the RNA polymerase at promoters is mediated by the ẞ-subunit transcription initiation requires the core enzyme transcription initiation of the lac operon is independent of cAMP levels in the cell 3 pts Question 32 According to the wobble-base hypothesis: 3 pts positions 2 and 3 of the anti-codon always participate in Watson-Crick base pairing, while position 1 can participate in non-Watson-Crick base pairing O aminoacyl-tRNA synthetases recognize multiple tRNAs one codon encodes for more than one amino acid anti-codons may interact with codons either in a parallel or an anti-parallel fashion the wobble base (A2451 of 23S rRNA) performs a nucleophilic attack at the a-amino group of the amino acid in the A site, during peptide bond formation Question 33 Which one the following nucleotides, GTP, CMP, ADP, CAMP, and UTP is structurally distinct as compared to the rest? CAMP GTP CMP ADP UTP 3 pts