In the expression of the gene for insulin, which is secreted outside certain mammalian cells, which of the following steps will occur last?
a. binding of signal recognition particle (SRP)
b. removal of introns
c. binding of transcription factors
d. binding of a release factor
Ans: d. binding of a release factor
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Which of the following is not true of the genes encoding the enzymes required for transporting and metabolizing galactose in yeast?
A. Each of the GAL genes is transcribed separately. B. The GAL genes are arranged in an operon. C. All of the GALgenes have similar promoters. D. All of the GAL genes are coordinately regulated by a common set of proteins.
Cycles of biological activity that are repeated every 24 hours are called ____
a. systemic acquired rhythms b. tropisms c. physiological requirements d. circadian rhythms e. photoperiods
A primary immune response is the immune response elicited by the
A) primary antigen of a disease-causing microorganism. B) primary antibodies of a disease-causing microorganism. C) first exposure of lymphocytes to a particular antigen. D) first exposure of memory cells to a particular antigen.
Viral meningitis is much more common than bacterial meningitis and tends to cause a milder form of disease
Indicate whether the statement is true or false