Twenty-Five Years Ago,when Oshima and Colleagues Discovered That a Mutation

question 35

Multiple Choice

Twenty-five years ago,when Oshima and colleagues discovered that a mutation in the GAL4 gene led to the inability to synthesize all five enzymes required for galactose catabolism (breakdown) ,they couldn't be blamed for wanting to apply a bacterial model to explain this finding.What they expected,but did not find,was _____.

• A)for all five genes to constitute an operon
• B)five widely separated genes,each containing a GAL4 binding site in its regulatory region
• C)for chromatin decondensation to play an important role in regulating the genes of galactose catabolism
• D)for transcription to be important in regulating the genes of galactose catabolism

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Definitions:

Babbling

The stage in language acquisition where infants produce unintelligible sounds, combining vowels and consonants like "ba" and "da," which precedes speech development.

Cultural Background

The cultural experiences, traditions, and values that shape an individual's beliefs and behaviors.

Echolalia

The repetition of phrases or sounds that one hears, a behavior often observed in individuals with autism.

Repeating Syllables

A cognitive and linguistic development process in infants where they experiment with sounds by repeating vowel-consonant combinations, facilitating language learning.