Which of the following interferes with cell wall synthesis by blocking alanine bridge formation?
A) beta-lactams
B) cycloserine
C) bacitracin
D) vancomycin
E) both cycloserine and vancomycin
E
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The development of Alzheimer's disease is associated with deposits of which of the following proteins?
A. b-amyloid B. protein kinase A C. myosin D. hemoglobin E. cAMP-response-element-binding protein (CREB)
The protein coat of a virus
A. is called a capsomere. B. is called a capsid. C. protects the nucleic acid. D. is involved in the recognition of host cell receptors by non-enveloped viruses. E. is called a capsid, protects the nucleic acid, AND is involved in the recognition of host cell receptors by non-enveloped viruses.
Which protozoan group consists solely of parasitic forms?
A) apicomplexans B) ciliates C) flagellates D) amoebas
In Escherichia coli, when the lac operons is fully induced (in the presence of lactose)
A. The lac repressor is active and transcription of the lac operon does not occur B. The lac repressor is inactive and transcription of the lac operon does occur C. Lactose cannot be transporter by the cells D. Lactose cannot be cleaved to enter glycolysis