FtsZ is a bacterial cytoskeletal protein that forms a contractile ring involved in bacterial cytokinesis. Its function is analogous to _____
A) the cleavage furrow of eukaryotic animal cells
B) the cell plate of eukaryotic plant cells
C) the mitotic spindle of eukaryotic cells
D) the microtubule-organizing center of eukaryotic cells
Answer: A
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During the process of eukaryotic mRNA degradation, all of the following occur except:
A. The poly(A) tail is lengthened. B. The 5' cap is removed. C. The exosome degrades the molecule to component nucleotides. D. Localization to processing bodies occurs.
A Barr body exists for the purpose of _____
a. gene dosage compensation b. insuring fertilization c. blocking the activity of the Y chromosome d. turning on the SRY gene e. activating master genes
Postzygotic reproductive isolation occurs
a. just after the union of the egg and sperm nuclei. b. during embryo development. c. during fetal development. d. after birth. e. with any of these.
The process that causes embryonic cells to produce signals that alter the behavior of neighboring cells is known as
A. contact inhibition. B. ooplasmic localization. C. embryonic induction. D. pattern formation. E. gene splicing.