When one cell goes through cell division, it produces ________
A) two identical cells
B) two different cells
C) four identical cells
D) four different cells
A
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Summarize the steps involved with the inflammatory response
What will be an ideal response?
Bacteria methylate their DNA in order to:
a. prepare for DNA replication. b. prepare for mitosis. c. effectively infect other cells. d. protect it from restriction enzymes. e. prevent viral DNA from hybridizing with bacterial DNA.
Which characteristic applies to a normal individual who is a carrier for an X-linked trait such as hemophilia?
A) The carrier is always female. B) The carrier is homozygous for the recessive condition. C) The carrier shows the recessive phenotype. D) The carrier cannot have daughters who have the allele.
In a method called patch-clamping, a glass capillary can be converted into a microelectrode that measures the electrical currents across biological membranes. Which of the following is not true about the patch-clamp method?
(a) The glass capillary adheres to a "patch" of membrane through the application of suction. (b) The aperture in the glass capillary used to make a microelectrode is about 1 ?m in diameter. (c) If the experimental conditions are held constant, fluctuations in electrical currents across the patch of membrane are still observed. (d) Single-channel patch-clamp recordings have demonstrated that gated membrane channels will only open and close in response to specific stimuli. Ion Channels and Signaling in Nerve Cells