Which of the following health problems might be cured with embryonic stem cell treatment?
a. Muscular dystrophy
b. All of these choices
c. Heart disease
d. Parkinson's disease
e. Blindness
b
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Antibiotics are derived from all of the following, except ________.
A. Penicillium B. Bacillus C. Staphylococcus D. Cephalosporium E. Streptomyces
Precipitation is higher in tropical regions than in temperate and polar regions
Indicate whether the statement is true or false
The structure that transports sperm cells from the epididymis to the urethra is the
A. vas deferens. B. ductus arteriosus. C. semen. D. prostate tubules.
Which of the following describes the Lac operon in E. coli when lactose, but not glucose, is present in the culture medium?
A. CAP and the Lac repressor are both bound to the Lac operon's regulatory DNA, and the Lac operon is not expressed. B. Neither CAP nor the Lac repressor is bound to the Lac operon's regulatory DNA, and the Lac operon is expressed. C. Neither CAP nor the Lac repressor is bound to the Lac operon's regulatory DNA, and the Lac operon is not expressed. D. CAP, but not the Lac repressor, is bound to the Lac operon's regulatory DNA, and the Lac operon is expressed. E. The Lac repressor, but not CAP, is bound to the Lac operon's regulatory DNA, and the Lac operon is not expressed.