In animal cells, the centrosome _____.
A) maintains the attachment of sister chromatids until anaphase begins
B) forms the center from which microtubules extend to form the spindle
C) of each chromosome attaches to the extended bipolar spindle
D) forms the constriction along the length of the condensed chromosome
Answer: B) forms the center from which microtubules extend to form the spindle
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A means of detecting the presence of specific carbohydrate moieties on glycoproteins is
A) SDS-PAGE. B) the freeze-fracture technique. C) photobleaching. D) ferritin-conjugated lectins. E) liposome formation.
DNA replication occurs during the __________ of the cell cycle
a. S phase b. G1 phase c. G2 phase d. interphase
Different responses of the same hormone, or antiestrogen agent, is due to
a. differences in luciferase activity. b. receptor sites for estrogen. c. differences in gene amplification. d. cyclic AMP levels. e. receptors in the hypothalamus.
What is alternative splicing?
What will be an ideal response?