Which of the following pairs is mismatched?
A) alcohol-acetone — decolorizer
B) crystal violet — basic dye
C) safranin — acid dye
D) iodine — mordant
E) carbolfuchsin — basic dye
C
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A certain gene is transformed into a plant cell for potential use as a vaccine delivery system. Upon performing a Northern blot, a good deal of mRNA for the gene is produced. However, the protein product for the gene is not observed. One explanation may be that the
A) plant cell recognizes and degrades the protein in the cytoplasm. B) plant ribosomes are not recognizing the mRNA translational initiation sites. C) mRNA is not stable in the plant cytoplasm. D) all of the above E) none of the above
Which of the following types of epithelia would be likely to make up the tubules of the kidney?
A. cuboidal B. squamous C. columnar and squamous D. columnar E. pseudostratified
What is the goal of DNA sequencing?
a. to determine the protein products of particular genes b. to distinguish the exons from the introns c. to determine the precise order of the nucleotides d. to distinguish wild type from mutated DNA
Complex, three-dimensional, tertiary structures of proteins result from
A) ionic bonds. B) ionic and hydrogen bonds C) hydrogen and disulfide bonds. D) hydrogen bonds. E) disulfide bonds.