What happens at the G2 checkpoint?
A. The cell checks that the DNA has replicated.
B. The cell receives external signals to divide.
C. The cell makes sure the chromosomes are lined up correctly.
D. The cell enters G0.
E. The cell makes a commitment to divide.
Answer: A
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Four of the five answers listed below are events of the inflammatory response. Select the exception
a. Capillary permeability increases. b. Histamines are released. c. Blood vessels dilate. d. Temperature of the affected area drops. e. Phagocytes migrate toward the affected area.
Gene expression requires the participation of the
following three types of RNA: __________, __________and __________. Fill in the blank(s) with the appropriate word(s).
Antibody diversity is due to genetic influences on the:a
Fc region. b. heavy chain. c. variable region. d. light chain. e. constant region.
The mature male gametophyte is produced
A. in the pollen tube when the generative cell divides. B. within the pollen granule during transfer. C. within the ovule just prior to fertilization. D. in the anther. E. when the pollen makes contact with the stigma.