Middle eastern respiratory syndrome (MERS) is caused by

A) Streptococcus pneumoniae.
B) the influenza virus.
C) a coronavirus.
D) a rhinovirus.


Answer: C

Biology & Microbiology

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Stomatal closure is passive because ______________

A. K+ and Cl- diffuse from high to low concentration B. water diffuses from low to high concentration C. ATP is required D. it conserves leaf hydration

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According to the theory of endosymbiosis, ________ were once free-living prokaryotic organisms

a. mitochondria and chloroplasts b. all of the choices c. ribosomes d. the nucleus and endomembrane system

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Which of the following is an example of a

cartilaginous joint? a. skull plates b. humerus to the scapula c. leg bone connected to the hip bone d. teeth connected to the jaw e. two vertebrae together

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The protein class(es) involved in the activation of transcription is (are)

A) general transcription factors (GTFs). B) transactivators. C) coactivators. D) A and B only E) A, B, and C

Biology & Microbiology