Although the Expression of Most Genes Is Tightly Regulated, Some

question 13

Multiple Choice

Although the expression of most genes is tightly regulated, some genes are expressed at roughly constant rates. Which of the following genes would you predict to be constitutively (constantly) expressed?

• A) genes involved in the biosynthesis of the amino acid tryptophan
• B) genes involved in the degradation of tryptophan
• C) genes involved in the degradation of arabinose, a sugar
• D) genes that code for regulatory proteins

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Definitions:

Puberty

The developmental stage during which children mature sexually and physically, becoming capable of reproduction.

Genie

A feral child who became a notable case study in linguistics and psychology for her critical period language acquisition after being discovered in severe isolation.

Critical Period

A specific time during development when the organism is particularly sensitive to certain stimuli, making it easier for learning or development to occur.

Language Acquisition

The process by which humans learn to comprehend and communicate through language, including spoken, written, and sign languages, naturally occurring from infancy.