Regulation of Transcription & Translation (AQA A-Level Biology): Quizzes
📚Quizzes
Practise the questions
10 questions from this quiz
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Practise the questions
10 questions from this quiz
Where are transcription factors initially located before activation?
Where are transcription factors initially located before activation?
Cytoplasm
What is the role of activator transcription factors?
What is the role of activator transcription factors?
Stimulate transcription
Where does oestrogen bind to its receptor protein?
Where does oestrogen bind to its receptor protein?
In the cytoplasm
What does the oestrogen-receptor complex act as?
What does the oestrogen-receptor complex act as?
A transcription factor
What does siRNA do to target mRNA molecules?
What does siRNA do to target mRNA molecules?
Cuts them into fragments
What is the key difference between siRNA and miRNA mechanisms?
What is the key difference between siRNA and miRNA mechanisms?
siRNA cuts; miRNA blocks translation
How does miRNA specificity compare to siRNA?
How does miRNA specificity compare to siRNA?
miRNA is less specific
What happens in the lac repressor system when lactose is absent?
What happens in the lac repressor system when lactose is absent?
Repressor binds DNA; transcription blocked
What happens to the lac repressor when lactose is present?
What happens to the lac repressor when lactose is present?
It cannot bind to DNA
Why might mRNA be produced but no functional protein appears?
Why might mRNA be produced but no functional protein appears?
Post-transcriptional control like RNAi