Select all of the characteristics that optimize immunogenicity of an antigen.
A. They are molecules of complex composition, such as proteins or protein-containing compounds.
B. They are molecules of simple composition.
C. They are composed of a single type of subunit.
D. Their molecular weight is less than 1,000.
E. They are repetitious polymers.
A. They are molecules of complex composition, such as proteins or protein-containing compounds.
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Which of the following crosses lipid bilayers the slowest?
A) a sodium ion B) a small, polar molecule like water C) a large, polar molecule like glucose D) a small, nonpolar molecule like oxygen (O2)
(Please choose from the lettered responses below.) Phylogenetic trees help us understand: 1. the genetic relationships among a species. 2. the evolutionary relationships among a species. 3. the relationships of symmetry among related species. 4. the level
A. 1 and 2 B. 2 and 3 C. 2 and 4 D. 3 and 4
The living members of the ____ lineage, the hagfishes, are jawless vertebrates with axial skeletons composed of only a cranium and a notochord.
a. Petromyzontoidea b. Placodermi c. Cephalochordata d. Urochordata e. Myxinoidea
Which of the following terms is used to describe a situation in which recombinant DNA technology is used on multicellular organisms:
a) transgenic technology. b) genetically modified organisms (GMOs). c) genetically modified foods (GMFs). d) All of the above can describe recombinant DNA technology in a multicellular organism. e) Only answers b) and c) are possible names for this type of technology.