The function of the bacteriophage ? N protein is to:
A. bind directly to the promoter of genes that are active late in the infection process.
B. allow transcriptional read-through of hairpin terminator sites in mRNA.
C. block ? repressor synthesis.
D. block transcription of all phage genes except its own.
B
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Most deaths among endangered Florida panthers are caused by disease
Indicate whether the statement is true or false.
Acute glomerulonephritis is due to:
A) deposition of immune complexes in the kidney B) destruction of glomeruli by Streptolysin O C) formation of cross-reacting antibodies D) invasion of the kidney by Streptococcus pyogenes
If a male cat with orange fur produces female offspring with calico fur, what color was the mother cat?
A. orange or calico B. calico C. black or calico D. black E. orange
What viral disease has been successfully eradicated?
A. smallpox B. cowpox C. vaccinia D. varicella E. erythrovirus