Which of the following molecules does not act as a second messenger?
a. protein kinase
b. IP3
c. DAG
d. calcium ions
e. cyclic AMP
A
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The illustration above shows a representation of formic acid. A formic acid molecule _____
A) will form hydrogen bonds with water molecules B) has a tetrahedral configuration of hybrid electron orbitals for the carbon atom C) consists of largely nonpolar covalent bonds D) is held together by hydrogen bonds E) has a pyramidal shape and will form hydrogen bonds with water molecules
If you were to design a long-term research study to determine why there are no human births in Lapland during the months of August, September, and October, you would need to also examine a comparison population of humans in which births took place every month. The primary reason for including a comparison population within the design of this experiment would be to:
A. accumulate more facts that could be reported to other scientists. B. test the effects of more than one variable at the same time. C. prove that there are no births in Lapland during August, September, and October. D. act as a control that would ensure that the results obtained are due to a difference in only one variable.
Consider a mutant organism that is unable to make the amino acid arginine. Knowing that the metabolic pathway for
arginine production is ornithine ® citrulline ® arginine, you test the ability of the mutant to grow in the presence of just one of these compounds. You find that the mutant can grow in the presence of arginine, but not in the presence of citrulline or ornithine. From this, you can conclude that the product of the mutant gene is most directly involved in the production of ____.
a. arginine from ornithine b. arginine from citrulline c. citrulline from ornithine d. ornithine from arginine e. citrulline from arginine
Nutrigenomics is the study of ________
A) the relationship between diet and the genome B) the vitamins and minerals in the genome C) the effect of nutrition on genome sequences D) the effect of genomics on dietary desires