Sickle- Cell Anemia Is Caused When One Nucleotide Is Changed

question 23

Essay

Sickle- cell anemia is caused when one nucleotide is changed to another nucleotide in the hemoglobin gene.How does this one small change cause the life- threatening disease of sickle- cell anemia?

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Definitions:

Bile

Mixture of salts, pigments, and cholesterol produced in the liver, then stored and concentrated in the gallbladder; emulsifies fats when secreted into the small intestine.

Fats

Organic compounds consisting of triglycerides that are insoluble in water and serve as a major energy source for the body.

Carbohydrates

Organic compounds, consisting of carbon, hydrogen, and oxygen, that are broken down to release energy in the body, including sugars, starches, and cellulose.

Mechanical Digestion

The physical process of breaking down food into smaller pieces without chemical change, typically accomplished by chewing and the action of the stomach.