Yeast research with autonomously replicating sequences (ARS), along with digestion of chromatin with DNase I, have led scientists to determine that
A) DNA is not protected inside a nucleosome.
B) ARSs are really plasmids.
C) ARSs bond irreversibly to replication enzymes.
D) origins of replication are accessible regions of DNA devoid of nucleosomes.
D) origins of replication are accessible regions of DNA devoid of nucleosomes.
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What is the main function of the placenta?
a. "To remove waste from the mother." b. "To keep the fetus from sliding out of the uterus." c. "To support the pregnant woman's health." d. "To provide nutrients to the fetus."
P1 bacteriophage can be used as an experimental vehicle to move genes from one cell to another because occasionally large pieces of host DNA are accidently packaged into phage heads. What is this process called?
A. lysogeny B. bacterial transduction C. phase variation D. transposition E. cointegration
Medically, what do persons with bulimia often require treatment for?
What will be an ideal response?
A heterotrophic, unicellular, eukaryotic cell is
A. Alga. B. Bacterium. C. Archeon. D. Protozoan.