The release of testosterone requires
a. GnRH.
b. luteinizing hormone.
c. Sertoli cells.
d. GnRH and luteinizing hormone.
e. GnRH, luteinizing hormone, and Sertoli
cells.
D
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Diabetes is an increasing public health concern due to _____
a. the decreasing number of patients with this condition b. the many negative health effects it causes c. its relative ease of treatment d. difficulty creating insulin to treat it e. the high costs of treating it
The work of Beadle and Tatum
1.showed that one gene seemed to affect one enzyme. 2.showed that protein was the genetic material. 3.showed that each gene seemed to affect several enzymes. 4.showed that DNA was the genetic material. 5.showed that each enzyme contained just one polypeptide.
How much of the radiant energy from the sun is incorporated into organic compounds in the process of photosynthesis?
A. 50% B. 1% or less C. 25% D. almost 90%
A particular reaction has a negative delta G. However, this reaction takes many years to proceed in the absence of enzyme. Why is this the case?
A. A certain amount of activation energy is required for the reaction to proceed B. This reaction does not proceed spontaneously C. The initial free energy of the reactants is much less than the final free energy of the products D. This reaction does not obey the second law of thermodynamics