Which of the following terms is most closely related to genetic complementation?
A. Reverse transcription
B. Phenotypic rescue
C. Naked DNA
D. SOS response
Answer: B
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What is the simplest method to measure population density in a given area?
A. Count the number of organisms. B. Perform a line transect. C. Look for random dispersion patterns. D. Count the number of reproductive adults. E. Calculate a survivorship curve.
Heterochromatin is highly ________, thus constitutive heterochromatin plays a(n) ________ role and facultative heterochromatin functions in ________
A) compacted; structural; regulation of gene expression B) compacted; regulatory; structure C) denatured; regulatory; structure D) denatured; structural; regulation of gene expression E) modified; evolutionary; structure
What happens when the membrane potential of a neuron reaches the threshold level?
a. Voltage-gated sodium channels open, and sodium diffuses out of the cell. b. Voltage-gated potassium channels open for a very brief period. c. Voltage-gated sodium channels close, so sodium cannot diffuse out of the cell. d. The sodium channel protein changes its shape to open the gates of the channel. e. The membrane potential is more negative than when at rest.
What is the expected phenotypic ratio of a cross between two orange-eyed MendAliens?
A) 3 black-eyed:1 orange-eyed B) 0 black-eyed:1 orange-eyed C) 1 black-eyed:3 orange-eyed D) 1 black-eyed:0 orange-eyed E) 1 black-eyed:1 orange-eyed