Double-stranded DNA will separate into two strands when exposed to
A. high temperature.
B. high pH.
C. low temperature.
D. low salt.
E. high temperature AND high pH.
E
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Would a denatured antigen be expected to have the same epitopes as its native (non-denatured) counterpart? Why?
A. Yes-epitopes are just a sequence of amino acids in a row, so they do not change regardless of 3D shape of the protein molecule they lie within. B. No-ALL epitopes are dependent on being in the proper original 3D conformation in the protein they arise within. Denaturing them would destroy them by destroying that conformation. C. Yes AND No-SOME epitopes are dependent on 3D conformation (conformational epitopes), while some simply depend on the sequence of amino acids (linear epitopes). So, really, it depends on the particular epitope.
What happens during the process of gene flow in a population?
a. DNA of organisms in a population is randomly changed through mutation b. the allele frequencies vary between generations due to migration c. allele frequency slowly shifts towards the dominant alleles in the population d. allele frequencies randomly change from random mating through the generations
In humans, specialized cells that produce gametes are
A. germ cells. B. somatic cells. C. sperm cells. D. egg cells. E. All of the answer choices are correct.
Which of the following is composed of a 1:2:1 ratio of carbon to hydrogen to oxygen?
a. carbohydrate b. protein c. lipid d. nucleic acid e. steroid