Which of the following is a J-shaped muscular sac that serves in the temporary storage of masticated food while digestive enzymes and HCl are released to digest proteins?
A) large intestines
B) colon
C) stomach
D) esophagus
C
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Although the exact microbial composition varied among individuals, the HMP found that the collection of _______ made by the normal biota was very stable
Fill in the blank(s) with the appropriate word(s).
Boundaries offer unique habitats
A) that offer relatively easy access to adjacent communities. B) that do not offer easy access to adjacent communities. C) that support only species specially adapted to the boundary environment. D) whose composition is almost exactly the same as adjacent communities.
Which compound plays a pivotal role in both the first and last step of the TCA cycle?
a. oxalate b. oxaloacetate c. glycerol d. acetyl CoA e. pyruvate
Which of the following is not an essential step in homologous recombination?
A) exonuclease degradation B) branch migration C) strand displacement D) duplex separation E) endonuclease nicking