Genomics is the study of
A. the information content of genomes.
B. the gene products that genomes encode.
C. the molecular organization of genomes.
D. All of the choices are correct.
Answer: D
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Kisspeptin is a protein (coded for by the KISS-1 gene) that in humans has an important role in initiating secretion of gonadotropin-releasing hormone (GnRH),
a hormone that stimulates the anterior pituitary gland to release other hormones related to reproduction. Endocrinologists are finding that the protein kisspeptin and its receptor are central to sexual maturation at puberty. The receptor for kisspeptin is coded for by the gene GPR54. Given the information above, the product of GPR54 is: A. a steroid. B. an intracellular protein. C. an extracellular protein. D. an amine. E. a transmembrane protein.
Biologists have described about _____ species of eukaryotic organisms, of which about _____ are animals. The majority of these are _____
A. 1.8 million; 1.3 million; insects B. 1 million; 500,000; vertebrates C. 30 million; 1 million; insects D. 30 million; 500,000; plants E. 1.8 million; 500,000; plants
A biome is most specifically defined as ____
a. a vegetation type plus its associated microorganisms, fungi, and animals b. a biological community and the physical environment with which it interacts c. the total dry weight of plants present in a specific area at any given time d. an assemblage of species living in the same place e. a group of organisms of the same species living together at one time
Which of the following correctly describes a reaction that has reached chemical equilibrium?
A) The rate of the forward reaction is equal to the rate of the reverse reaction. B) All of the reactants have been converted to the products of the reaction. C) All of the products have been converted to the reactants of the reaction. D) Both the forward and the reverse reactions have stopped, with no net effect on the concentration of the reactants and the products.