Which of the following is not part of a yeast artificial chromosome (YAC)?
A. The F factor
B. A CEN sequence
C. A selectable marker
D. An ARS
Answer: A
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Smooth muscle cells in the airways relax while those in the blood vessels contract in response to the hormone epinephrine. What would you expect to be different in these two types of cells exposed to epinephrine?
A. Types of proteins expressed. B. Presence of epinephrine receptors. C. Exposure to epinephrine released by neighboring cells. D. Rate of metabolism. E. Activation of protein kinases.
Metagenomic studies of prokaryotes have
revealed that
a. there is very little diversity among bacteria. b. archaea are more closely related to bacteria than to eukaryotes. c. bacteria and archaea are essentially the same organisms. d. most archaea evolved from viruses. e. none of these things were revealed by metagenomic studies
Base pairs in DNA are held together by _____ bonds.
A) Hydrogen B) Sulfhydryl C) Peptide D) Polar covalent E) Nonpolar covalent
Condensation
What will be an ideal response?