In translation, the wobble phenomenon is best illustrated by the fact that:
ACharged tRNA contains energy needed for peptide bonds to form
BThe last nucleotide provides specificity for the given amino acid
CA tRNA with the UUU anticodon can bind to either AAA or AAG codons
DThere are more amino acids than possible codons
EThe genetic code is preserved without mutations
Part of the success of the Streptococcus pyogenes bacterium lies in its ability to evade phagocytosis. Which of the following helps in this evasion?
AStreptolysin S
BStreptolysin O
CStreptokinase
DM protein
EPyrogenic toxin
An outbreak of diphtheria has occurred for the third time in a decade in a small village in South Africa. Diphtheria is endemic to the area with many healthy villagers colonized with different bacterial strains. Vaccine distribution in this area is difficult due to treacherous terrain. A team of doctors is sent to the region to conduct a health campaign. Toxigenic strains of C. diphtheria are isolated from symptomatic patients. Which of the following best explains the initial emergence of a pathogenic strain causing such outbreaks?
AInfection with a lytic phage
BConjugation between the toxigenic and non-toxigenic strains of C. diphtheriae
CSuppression of lysogenic cycle
DLysogenic conversion
EPresence of naked DNA in the environment
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