Which of the Following Flagellates Has a Single Nucleus in the Cyst

question 3

Multiple Choice

Which of the following flagellates has a single nucleus in the cyst and the typical curved, cytostomal fibril, which is called a shepherd's crook?

• A) Giardia lamblia
• B) Chilomastix mesnili
• C) Dientamoeba fragilis
• D) Enteromonas hominis

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Definitions:

Electrophilic Aromatic Substitution

A reaction where an electron-rich aromatic ring reacts with an electrophile, resulting in the substitution of a hydrogen atom with the electrophile.

Deactivating Group

A substituent attached to an aromatic ring that decreases the rate of electrophilic aromatic substitution reactions.

Activating Group

A substituent attached to a reactive center in a chemical compound that increases the compound’s reactivity.

Inductive Destabilization

The destabilization of a molecule due to the transmission of charge through bonds, typically affecting reactivity and stability.