Use the Following Information to Answer the Question

question 69

Multiple Choice

Use the following information to answer the question.
Giardia intestinalis is an intestinal parasite of humans and other mammals that causes intestinal ailments in most people who ingest the cysts. Upon ingestion, each cyst releases two motile cells, called trophozoites. These attach to the small intestine's lining via a ventral adhesive disk. The trophozoites anaerobically metabolize glucose from the host's intestinal contents to produce ATP. Reproduction is completely asexual, occurring by longitudinal binary fission of trophozoites, with each daughter cell receiving two haploid nuclei (n = 5) . A trophozoite will often encyst as it passes into the large intestine by secreting around itself a case that is resistant to cold, heat, and dehydration. Infection usually occurs by drinking untreated water that contains cysts.
The mitosome of Giardia has no DNA within it. If it did contain DNA, then what predictions should we be able to make about its DNA?

• A) It is linear, has many introns, and is not associated with histone proteins.
• B) It is linear, has few introns, and is complexed with histone proteins.
• C) It is circular, has many introns, and is complexed with histone proteins.
• D) It is circular, has few introns, and is not associated with histone proteins.

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Definitions:

Stomach

An organ in the gastrointestinal tract that breaks down food through the secretion of enzymes and acid, preparing it for further digestion and absorption.

Peristalsis

The series of wave-like muscle contractions that moves food through the digestive tract.

Anesthesia

A state of controlled, temporary loss of sensation or awareness that is induced for medical purposes, such as during surgeries or procedures that would otherwise cause pain or discomfort.

Postoperative

Referring to the period after a surgical procedure, focusing on recovery and monitoring for any complications.