The doctor responsible for introducing the idea of hand washing before attending patients was
A. Klein.
B. Semmelweis.
C. Koch.
D. Pasteur.
B
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Which hormone causes women to ovulate and men to produce testosterone?
a. Luteinizing hormone (LH) b. Gonadotropin-releasing hormone (GnRH) c. Human beta chorionic gonadotropin (?-HCG) d. Follicle stimulating hormone (FSH)
The first step in the Calvin cycle is the attachment of carbon dioxide to:
a. Rubisco. b. glyceraldehyde 3-phosphate (G3P). c. phosphoglycerate d. RuBP (ribulose bisphosphate). e. ATP.
Generalized defense responses in organs distant from the infection site are called _____
A) hyperactive responses B) systemic acquired resistance C) pleiotropy D) hyperplasia
The reaction of ethanol fermentation is: pyruvate + NADH ? ethanol + CO2 + NAD+. Why would a yeast need to perform this reaction in the absence of oxygen?
A. to produce NAD+ allowing the electron transport chain to run B. to produce NAD+ allowing glycolysis to continue C. to consume excess pyruvate that cannot enter the Krebs cycle D. NADH is necessary to reduce pyruvate to lactate E. to produce CO2 for respiration