Which element functions BOTH as an enzyme cofactor and as a stabilizer of ribosomes and nucleic acids?
A) iron
B) hydrogen
C) zinc
D) magnesium
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.
Homologous chromosomes do not have thesame:a
length. b. shape. c. genes. d. number. e. They have all of these
Aquatic organisms are unable to tolerate low pH conditions largely because acidic waters contain high concentrations of ________
Fill in the blank(s) with correct word
The immunodeficiency virus that causes acquired immunodeficiency syndrome is a(n) enveloped virus
____________________ Indicate whether the statement is true or false.