Viruses are not included in the taxonomic scheme proposed by Carl Woese because they lack
A) genetic material.
B) ribosomal RNA.
C) proteins.
D) lipid membranes.
E) cytoplasm.
B
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In the mammalian eye, the lens focuses an image ____
a. across the entire surface of the retina b. primarily on the fovea c. on the rods only d. slightly in front of the retina e. it varies based on where you are looking
Human immunodeficiency virus (HIV) is classified as
A. a retrovirus. B. a liver carcinogen. C. a skin-touch transmissable virus. D. responsive to antibiotics. E. a general mammalian infectious virus.
A large increase in the body's core temperature will cause what change in proteins?
a. denaturation b. an increase in function c. replication d. doubling of the rate of a reaction e. a small reduction in the rate of a reaction
In producing a genomic library, human DNA and plasmid DNA must first be treated with:a
the same restriction enzyme. b. different restriction enzymes. c. the same DNA ligase. d. different DNA ligases. e. cosmid cloning vectors