Viruses can be divided into seven basic classes. This classification is determined by:

A. nucleic acid of genome.
B. type of host infected.
C. cellular location of infection.
D. presence of nuclear DNA.
E. virus size.


A

Biology & Microbiology

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The availability of genomic data has allowed scientists to construct more accurate phylogenetic trees than those based on fossil evidence alone

a. True b. False Indicate whether the statement is true or false

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Steroid hormones do not require membrane receptors because they

a. are small enough to pass directly through the membrane. b. are lipid-soluble like the bilayer. c. pass through special channels. d. are water-soluble. e. dissolve in the cholesterol of the membranes.

Biology & Microbiology

Homeostasis within other body systems is maintained by which two organ systems?

A. urinary B. endocrine C. nervous D. circulatory E. respiratory

Biology & Microbiology

Glycopeptides, such as vancomycin, work by

A. Inhibition of DNA and RNA production B. Inhibition of cell wall synthesis C. Inhibition of protein production D. Cell wall destruction

Biology & Microbiology