21. What was the first bacterial genome to be sequenced and made public?
A. Bacillus subtilis
B. Escherichia coli
C. Haemophilus influenzae
D. No bacterial genome has been sequenced yet
22. Which of the following modified amino acid is used at the starting of most prokaryotic proteins?
A. N-formylserine
B. N-formylmethionine
C. N-formylleucine
D. N-formylalanine
23. During amino acid activation a(n)
A. amino acid is bound to tRNA
B. amino acid is bound to mRNA
C. methyl group is attached to rRNA
D. methyl group is attached to an amino acid
24. The nonsense codon(s) is/are
A. UAG
B. UAA
C. UGA
D. all of these
25. Which of the following defines an open reading frame (ORF)?
A. A sequence of genome in bacteriophage
B. The sequence of a complete genome
C. A plasmid vector used in genome sequencing
D. A possible gene predicted by DNA sequencing