The diameter of most animal and plant cells ranges from
A) 0.1 to 1.0 micrometers.
B) 1.0 to 10 micrometers.
C) 10 to 100 micrometers.
D) 100 to 1,000 micrometers.
Answer: C
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How is initiation at oriC regulated in bacteria?
A. SeqA binds to hemimethylated DNA and sequesters the newly replicated origin. B. DnaA-ADP, formed when DnaA hydrolyzes its ATP, cannot maintain the destabilization of the origin so the closed complex reforms. C. The Hda protein binds the ? clamp causing DnaA to hydrolyze its ATP. D. RNA polymerase activity produces superhelical twisting that promotes melting of the origin by DnaA. E. All of these choices are correct.
Exposure to which of the following antibiotics would cause a child to develop yellow teeth?
a. erythromycin b. tetracycline c. amoxicillin d. streptomycin e. penicillin
Which of the following would be appropriately sterilized using UV radiation?
stainless steel surface in biological safety cabinet used for media preparation stack of plastic petri dishes, prior to pouring media flask of nutrient broth nutrient agar plates with lids
Immediate causes of behavior, such as genes and environmental factors, are referred to as _______causes, while the evolutionary factors that shape behavior are ________causes.
Fill in the blank(s) with the appropriate word(s).