Which is the predominant second messenger involved in regulating glucose metabolism?
a. insulin
b. glucagon
c. adenyl cyclase
d. cyclic AMP
e. G protein
D
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In garden peas, one pair of alleles controls the height of the plant, and a second pair of alleles controls
flower color. The allele for tall (D) is dominant to the allele for dwarf (d), and the allele for purple (P) is dominant to the allele for white (p). A tall plant with white flowers crossed with a dwarf plant with purple flowers produces 1/4 tall purple, 1/4 tall white, 1/4 dwarf purple, and 1/4 dwarf white. What is the genotype of the parents? What will be an ideal response?
How does the first nucleotide at the 5? end of a new mRNA chain differ from the other nucleotides in the chain?
a. The first nucleotide is always a uracil. b. The first nucleotide is always a cytosine. c. The first nucleotide retains its triphosphate group, while the others do not. d. The first nucleotide does not retain its triphosphate group, while the others in the chain do. e. The first nucleotide is always a modified cytosine.
The function of messenger RNA (mRNA) is to transfer amino acids to the ribosomes during protein synthesis.
Indicate whether the statement is true or false.
The Ebola and Marburg viruses are the sole members of the (Flaviviridae/Filoviridae/Herpesviridae) family, named for their unusual filamentous form. (Be sure to use proper form.)
What will be an ideal response?