A hormone that is hydrophobic, derived from cholesterol, and binds to intracellular receptors is most likely a(n) ____
hormone.
a. fatty acid
b. steroid
c. protein
d. amine
e. carbohydrate
ANSWER: b
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Chemoheterotrophs
A. use sunlight as an energy source. B. use preformed organic molecules as a carbon source. C. use preformed organic molecules as an energy source. D. use inorganic chemicals as an energy source. E. use preformed organic molecules as a carbon source AND as an energy source.
Telomeres have at least two roles in chromosome integrity. Telomeres are composed of repeat sequences homologous to the RNA in telomerase used to replicate chromosome ends. Second, they
A) allow the chromosome to shorten each generation to speed up replication. B) interact with shelterin complexes that protect chromosome ends from degradation. C) permit the hairpin turn at the end to be cleaved. D) carry genes needed for DNA replication.
Double-stranded break repair mechanisms
A) are error prone. B) may join nonhomologous ends of DNA together. C) are part of the SOS repair system. D) may use homologous DNA to repair the damage. E) are error prone and may join nonhomologous ends of DNA together or use homologous DNA to repair the damage.
What is HP1 and how does it function?
What will be an ideal response?