The Use of Performance Enhancing Drugs Has Resulted in Drug

question 35

True/False

The use of performance enhancing drugs has resulted in drug screening at major sports events,such as the Olympics.

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Definitions:

Upstream Promoter Elements

DNA sequences located before (upstream of) the coding sequence of a gene that help initiate transcription by binding specific proteins.

Enhancers

Regulatory DNA sequences that enhance gene transcription; can be located long distances away from the actual coding regions of a gene.

Tryptophan Operon

A cluster of genes in bacteria involved in the production of the amino acid tryptophan, regulated by feedback inhibition.

Repressor Gene

A gene that encodes a protein which can bind to an operator or promoter sequences to prevent transcription of a certain gene.