Removal of which of the following lymphoid organs would be most detrimental to immune function in an infant?
What will be an ideal response?
thymus
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What continent was the starting point for the origination of humans?
A. Africa B. Asia C. Europe D. Australia E. North America
When the replication machinery encounters a single-strand break, the replication fork collapses resulting in a double-strand break. Which of the following would be the fourth step in repairing this damage?
A. The 3' single-strand overhang invades the intact portion of the chromosome, pairs with its complementary strand, and displaces the other. B. Once the strand invasion is complete, branched migration occurs. C. The broken ends are processed, with the 5' ending strand selectively degraded to create 3' overhangs. D. Branch migration creates Holliday intermediates that are resolved by the enzyme resolvase. E. Resolution of the Holliday intermediate is followed by ligation and replication is restarted.
The yield of ATP per glucose in fermentation
is
a. 2 b. 6 c. 12 d. 36 e. 40
The __________ can be considered a sorting, processing and packaging center
a. centriole b. centrosome c. Golgi complex d. vacuole e. cytoskeleton