Any substance that when dissolved in water will give off H+ ions is referred to as a(n) ________
A) pH
B) buffer
C) catalyst
D) acid
D
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The tissue antigens most involved in graft rejection involve
A. Rh. B. ABO. C. MHC. D. MLB.
Support for evolution has come from fossil evidence. All of the following statements about the fossil records are true except one. Choose the exception
a. Fossils found in adjacent rock layers are more similar to each other than those found in distant layers. b. Many organisms that lived previously were different from today's living organisms. c. All types of organisms have left a fossil record. d. Different organisms were present at different times in Earth's history. e. In general, simpler forms of organisms are found in older rocks; more complex forms in younger rocks.
The pathogenicity of which of the following is not the result of lysogeny?
A) Clostridium tetani B) Vibrio cholerae C) Corynebacterium diphtheriae D) Clostridium botulinum E) Streptococcus pyogenes
An advantage of cDNA over genomic DNA for cloning genes eukaryotes that are expressible in prokaryotes is that it
a. lacks exons. b. lacks introns. c. contains plasmid DNA. d. does not require a special enzyme for production.