Typical pneumonia is caused by which bacterium?
a) Haemophilus influenzae
b) Streptococcus pneumoniae
c) Mycoplasma pneumoniae
d) Legionella pneumophila
Ans: b) Streptococcus pneumoniae
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Expression of a cloned eukaryotic gene in a bacterial cell involves many challenges. The use of mRNA and reverse transcriptase is part of a strategy to solve the problem of _____
A) post-transcriptional processing B) electroporation C) post-translational processing D) nucleic acid hybridization E) restriction fragment ligation
Which feature(s) differentiate(s) Actinobacteria from Firmicutes?
A) absence/presence of a cell wall B) endospore production capability C) motility and chemotaxis abilities D) relative G+C content in their genomes
Which of the following explains how phloem sap moves within a plant?
A) cohesion-tension mechanism B) gravity pulls the phloem sap down C) pressure-flow mechanism D) transpiration
Figure 17.5
As the trees in England become less sooty due to pollution controls on factories, which of the moths in the accompanying figure will be selected against?
A. The dark moth on the dark tree B. The light moth on the light tree C. All of the light moths equally D. The dark moth on the light tree E. All of the dark moths equally