If you were identifying structures on a male cadaver, which structure would you identify as having the function of making testosterone?
A. testis
B. pancreas
C. parathyroid gland
D. adrenal gland
E. pineal gland
A. testis
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Examples of transgenic organisms include:
A. crop plants engineered to resist insect pests. B. rice enriched with vitamin A. C. sheep that produce a human protein in their milk that is used to treat emphysema. D. laboratory mice that develop heart disease and diabetes. E. All of the answer options are correct.
Sidney Brenner found bacteriophage T4 point mutants in which a protein was prematurely terminated. The premature termination point of the protein was different in different mutants
When he determined where the protein synthesis terminated for each mutant, in every case the next amino acid of the protein would have been a glutamine, lysine, glutamic acid, tyrosine, or serine. What is the unique similarity of these amino acids or their codons that would play a role in the premature termination of translation in the mutant protein gene? A. Each of the amino acids has an R-group containing an amine, hydroxyl, or carboxyl group. B. Each of the codons for these amino acids contains either U or G. C. Each of the codons for these amino acids could be changed to UAG with a single nucleotide mutation. D. Each of the amino acids is polar and charged.
In pine trees, the male gametophyte is
a. a megaspore. b. the embryonic pine seed. c. a pollen tube. d. a pollen grain. e. a microspore.
El Niño and La Niña ____.
A. both decrease water temperatures in the eastern Pacific Ocean B. both increase water temperatures in the eastern Pacific Ocean C. both increase water temperatures in the Gulf of Mexico D. cause more rain and less rain, respectively, in Australia E. cause fewer hurricanes and more hurricanes, respectively, in the North Atlantic