A reducing medium contains
A. sugars that can be fermented.
B. inhibiting agents.
C. extra oxygen.
D. hemoglobin, vitamins, or other growth factors.
E. substances that remove oxygen.
Answer: E
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Which of the following was first produced commercially using recombinant DNA technology?
A. hepatitis B vaccine B. interleukins C. human insulin D. human growth hormone
The witch hunts in the early American colonies may
have been due to the symptoms of infection by which of the following fungi? a Aspergillus b. Penicillium c. Epidermophyton d. Claviceps e. Cladosporium
Which of the following is a protective structure where egg cells are formed in bryophytes and some other plants?
a. stoma b. strobilus c. sporangium d. archegonium
Members of the genus Mycoplasma are pleomorphic and stain Gram-negative because they
A) lack cell walls. B) have sterols in their cytoplasmic membranes. C) lack cytoplasmic membranes. D) have mycolic acid in their cell walls. E) have a rudimentary cell wall.