How is the HIV provirus different from a lambda-phage prophage?
A) The HIV provirus is integrated permanently into the host cell's DNA.
B) All subsequent generations of HIV-infected cells carry the provirus.
C) All the offspring of a cell infected with a prophage will contain the virus.
D) The HIV provirus is inactive inside the host cell.
E) Lambda phage-infected cells produce virus slowly over time.
A
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Which of the following is not true of the process of nonsense-mediated mRNA decay?
A. Its function is to destroy mRNA molecules with premature stop codons. B. The participation of the ribosome is not required. C. It requires the marking of the mRNA before the mRNA is exported to the cytoplasm. D. It involves the removal of the 5' cap of the mRNA.
The cellular binding of IgE during an allergic reaction causes the release of which chemicals?
a. heparin and bradykinin b. prostaglandins and histamine c. histamine and serotonin d. prostaglandins and bradykinin e. serotonin and prostaglandins
A type of lymphocyte called a(n) ________ detects cells with abnormal surface proteins and kills them.
A. eosinophil B. NK cell C. neutrophil D. basophil E. mast cell
Symptoms of Toxic Shock Syndrome include all the following, except
A) Nausea, vomiting and diarrhea. B) Sunburn-like rash. C) Appearance of flesh being "eaten" down to the muscle. D) Fever and muscle pain E) Kidney and liver failure