Why do lacOC mutants express in cis-dominant and not in transdominant fashion?
What will be an ideal response?
Because in this mutant, the repressor cannot bind to the lac operator, preventing the downstream lac structural genes from being transcribed. Thus this mutant has no bearing on the functionality of another lac operon in a partial diploid construct.
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A cDNA library differs from a genomic DNA library in which way?
A. It consists solely of RNA molecules B. It contains many copies of the gene of interest C. It contains only coding sequences, not introns D. It is typically 10-100 times the size of a DNA library
Generally the proteins of thermophiles
A. resist denaturation. B. react more efficiently with DNA. C. are easily denatured. D. have a particular amino acid sequence that restricts bond formation. E. are easily denatured AND have a particular amino acid sequence that restricts bond formation.
Which protein is defective in cases of Duchenne muscular dystrophy?
a. dystrophin b. albumin c. fibrillin d. fibrinogen e. fibrin
Conversion of a six-carbon carbohydrate to two pyruvic acid molecules with accompanying reactions that release ATP and hydrogen atoms is called
A. glycolysis. B. Krebs cycle. C. electron transport system. D. carbon fixation.