Hfr cells are bacterial cells that ____
a. perform meiosis
b. have the F factor integrated into their chromosome
c. maintain the F factor in a plasmid
d. have a low frequency of recombination
e. have received DNA from a bacteriophage
ANSWER: b
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________ is the name given to the technique that utilizes radioactive molecules that bind to specific membrane proteins.
Fill in the blank(s) with the appropriate word(s).
After a young woman suffered a traumatic brain injury, she seemed clumsy and out-of-sorts. She was given a visual acuity test (the assessment for glasses) and general eye health exam, and her eyes were deemed healthy. Would these assessments be adequate to rule out any visual impairment resulting from the brain trauma?
_____ Yes, her clumsiness is more likely attributable to inner ear damage. _____ No, a neurological examination of her visual processing pathways would be necessary.
The dashed line in the accompanying figure represents a(n) ____
a. covalent bond b. ionic bond c. hydrogen bond d. polar covalent bond e. hydrophobic interaction
Which of the following is a density dependent limiting factor?
A) rain B) food supply C) weather D) frost