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What state is the repressor protein in when tryptophan is absent?
When tryptophan is absent, the repressor protein is in an inactive state, allowing transcription of the trp operon to continue. This is because the repressor protein needs tryptophan to bind to it, enabling it to attach to the operator region and block transcription of the operon.
What determines the enzyme's function?
Its composition and physical structure - this is determined by the DNA/RNA that coded for it.
The expression of the tryptophan operon is controlled by?
The expression of the tryptophan operon is controlled by a repressor protein that binds to the operator region in the presence of tryptophan. When tryptophan levels are high, the repressor is active and prevents transcription of the operon. When tryptophan levels are low, the repressor is inactive, allowing transcription to occur.
Structure that carries coded instructions for the cells activities?
The structure that carries coded instructions for the cell's activities is the DNA molecule. DNA contains genetic information that codes for proteins and regulates cell processes. This information is transcribed into RNA, which then directs cellular functions.
What region of the operon does the repressor bind to?
I assume you mean the lac operon. The repressor binds upstream of the gene(s) in the regulatory gene region.
When this is taken up by the cell it binds to the repressor so that the repressor no longer binds to the operator?
The inducer.
Describe the effect a repressor has on the lac operon when lactose is present?
When lactose is present, it binds to the repressor protein, causing a conformational change that prevents the repressor from binding to the operator region of the lac operon. As a result, RNA polymerase can transcribe the structural genes of the lac operon, leading to the production of enzymes involved in lactose metabolism.
Structure makes proteins using coded instructions that come from the nucleus?
Ribosomes
What structure makes proteins using coded insturcions that come from the nucleus?
ribosomes
What state is the repressor protein in when tryptophan is absent?
When tryptophan is absent, the repressor protein is in an inactive state, allowing transcription of the trp operon to continue. This is because the repressor protein needs tryptophan to bind to it, enabling it to attach to the operator region and block transcription of the operon.
The operon segment composed of the gene that codes for a protein repressor is called the?
The operon segment composed of the gene that codes for a protein repressor is called the regulatory gene. This gene produces the repressor protein that can bind to the operator region of the operon, preventing transcription of the structural genes when the repressor is bound.
What determines the enzyme's function?
Its composition and physical structure - this is determined by the DNA/RNA that coded for it.
The expression of the tryptophan operon is controlled by?
The expression of the tryptophan operon is controlled by a repressor protein that binds to the operator region in the presence of tryptophan. When tryptophan levels are high, the repressor is active and prevents transcription of the operon. When tryptophan levels are low, the repressor is inactive, allowing transcription to occur.
What is an analogy that demonstrates how the lac repressor functions?
The lac repressor can be likened to a security guard at a gate. When lactose is not present, the lac repressor binds to the operator region of the lac operon, preventing RNA polymerase from transcribing genes for lactose metabolism. Just like how the security guard restricts entry to unauthorized individuals, the lac repressor restricts gene expression in the absence of lactose.
A repressor protein binds with?
The regulator
Structure that carries coded instructions for the cells activities?
The structure that carries coded instructions for the cell's activities is the DNA molecule. DNA contains genetic information that codes for proteins and regulates cell processes. This information is transcribed into RNA, which then directs cellular functions.
What is protein primary structure?
it's a genetically coded sequence of amino acids in a polypeptide chain
