Gene Regulation (VCE SSCE Biology): Quizzes
📚Quizzes
Practise the questions
10 questions from this quiz
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Practise the questions
10 questions from this quiz
Why do cells use gene regulation?
Why do cells use gene regulation?
To conserve energy by making proteins only when needed
What do structural genes code for?
What do structural genes code for?
Proteins like enzymes and receptors
How do repressor proteins control gene expression?
How do repressor proteins control gene expression?
By binding to the operator region
What is an operon?
What is an operon?
Linked genes sharing a common promoter
What does the trp operon control?
What does the trp operon control?
Production of tryptophan
What role does tryptophan play in repression?
What role does tryptophan play in repression?
Acts as a corepressor
What happens when tryptophan levels are high in repression?
What happens when tryptophan levels are high in repression?
Active repressor binds operator, blocks polymerase
What does attenuation do?
What does attenuation do?
Stops transcription prematurely
What forms when tryptophan levels are high during attenuation?
What forms when tryptophan levels are high during attenuation?
Terminator hairpin loop
How does repression differ from attenuation?
How does repression differ from attenuation?
Repression responds to free tryptophan levels