TRP OPEROM Flashcards
What is an operon?
An operon is a cluster of genes under the control of a single promoter that are transcribed together.
What is the primary function of the trp operon?
The trp operon is responsible for the biosynthesis of the amino acid tryptophan.
Fill in the blank: The trp operon is regulated by the __________ protein.
trp repressor
What happens when tryptophan levels are high in the cell?
The trp repressor binds to the operator region, blocking transcription of the operon.
What are the structural genes of the trp operon?
The structural genes are trpE, trpD, trpC, trpB, and trpA.
Fill in the blank: The trp operon is found in __________ organisms.
prokaryotic
What is feedback inhibition in relation to the trp operon?
Feedback inhibition refers to the process where the end product, tryptophan, inhibits its own synthesis by activating the repressor.
What is the effect of low tryptophan levels on the trp operon?
low trp repressor does not bind , allowing transcription to occur.
What is the significance of the trp operon in bacterial metabolism?
It allows bacteria to regulate tryptophan synthesis based on their nutritional needs.
Fill in the blank: In the absence of tryptophan, the trp repressor is __________.
inactive
What is the function of the promoter in an operon?
rna - promoter region so transciption can occur
Fill in the blank: The trp operon is an example of __________ gene regulation.
prokaryotic
What does the term ‘cis-acting elements’ refer to in the context of the trp operon?
Cis-acting elements are DNA sequences, like the promoter and operator, that regulate the expression of genes on the same DNA molecule.
ROPC
REPRESSOR ,
PROMOTER (RMA POLYMERASE BINDS HERE TO STAT TRANSCIRPTION
OPERATOR REGION (JOINS W REPRESSOR TO STOP GENE FUNCTION
CODING REGION
Attenuation : backup control has trp codon to recognise it and stop it
