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18 Cards in this Set

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Gene Expression

the activation or "turning on" of a gene that results in transcription and the production of mRNA

Lac Operon

a gene system whose operator gene and three structural genes control lactose metabolism in E. Coli

Promoter

DNA segment that is recognized by the enzyme RNA polymerase

Operator

DNA segment that serves as a kind of switch by controlling access of RNA polymerase to the promoter

Structural Genes

Genes that code for polypeptides

Trp Operon

Makes tryptophane, stops making tryptophane when white meat is ingested

Intron

Section of a structural gene that is transcribed, but not translated

Exon

Section of a structural gene that when expressed, are transcribed and translated

Proto-oncogenes

Regulates cell growth, cell division, and the ability to adhere to one another

Oncogenes

Mutation in a proto-oncogene, gene that can cause uncontrolled cell proliferation

Tumor (toomah)

Abnormal proliferation of cells that results from uncontrolled, abnormal cell division

Benign (B9) Tumor (Toomah)

Tumor that is inactive or non-lethal

Malignant Tumor (Toomah)

Tumor that is highly dangerous, usually causes cancer

Cancer

Uncontrolled growth of cells that can invade other parts of the body

Tumor (Toomah) Suppression Gene

Codes for proteins that prevent cell division from occurring too often

Metastasis

Spread of cancer cells beyond their original site

Carcinogens

Causes cancer

Kinds of Cancer Discussed

Leukemia, Skin Cancer, Lung Cancer