Which of the following occurs when allolactose levels increase in E. coli?
A. Transcription of genes within the lac operon increases.
B. Transcription of genes within the lac operon decreases.
C. Transcription of genes within the lac operon does not change.
D. E. coli cells replicate rapidly.
E. The tryptophan operon becomes more active.
A. Transcription of genes within the lac operon increases.
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After reaching the inner ear, the frequency of a sound primarily affects
A. the amplitude of basilar membrane vibration. B. the location of the greatest basilar membrane vibration. C. the vibrational amplitude of the tectorial membrane.
The Human Microbiome
What will be an ideal response?
Which type of phagocytic immune cell would you find in the nasal epithelium?
A. basophil B. natural killer cell C. macrophage D. mast cell E. monocyte
Which of the following does NOT cause otitis media?
A) Streptococcus pneumoniae B) Haemophilus influenzae C) Streptococcus pyogenes D) Moraxella catarrhalis E) Coxiella burnetii