Which of the Following Are NOT Found in the Gastrointestinal

question 49

Multiple Choice

Which of the following are NOT found in the gastrointestinal tract of healthy humans?

• A) Bacteroides
• B) Clostridium
• C) Protists
• D) Escherichia coli

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Definitions:

Enantiotopic

Referring to atoms or groups in a molecule that are mirror images of each other but are not superimposable, often relating to prochiral centers.

1,1-Dimethylcyclobutane

A cyclobutane derivative where two methyl groups are attached to the same carbon atom, making it a branched alkane.

Coupling Constants

Parameters in nuclear magnetic resonance (NMR) spectroscopy that measure the interaction between nuclear spins, providing insights into molecular structure.

Doublet of Triplets

A specific NMR spectroscopy pattern indicating splitting of a signal into two sets of triplets, often due to coupling with two different sets of protons.