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:

Hemoglobin

A molecule found in red blood cells responsible for transporting oxygen from the lungs to the tissues throughout the body and bringing carbon dioxide from those tissues back to the lungs.

Metabolism

This is the set of life-sustaining chemical reactions in organisms, involving the conversion of food to energy, the elimination of nitrogenous wastes, and the synthesis of necessary compounds.

Triglycerides

A type of fat found in the blood, originating from foods or produced by the body, used for energy storage.

Fatty Acids

Long-chain hydrocarbons found in fats and oils that are sources of energy, important in diet and metabolism.