Front

What is negative control in gene regulation?

Back

Negative control refers to the process where a regulatory molecule binds to DNA and inhibits gene expression.

Front

Which type of cells contain operons?

Back

Prokaryotes contain operons, which are clusters of genes under the control of a single promoter.

Front

What is the effect of DNA methylation on transcription?

Back

DNA methylation typically represses transcription, making it less likely for genes to be expressed.

Front

Which type of cells commonly have enhancers?

Back

Eukaryotic cells commonly have enhancers, which are regulatory DNA sequences that increase the likelihood of transcription.

Front

What is the function of the operator in an operon?

Back

The operator is the 'on/off' switch for an operon, controlling the access of RNA polymerase to the genes.

Front

What role do transcription factors play in gene regulation?

Back

Transcription factors are proteins that help regulate the transcription of specific genes by binding to nearby DNA.

Front

What is the difference between positive and negative control in gene regulation?

Back

Positive control enhances gene expression, while negative control inhibits it.

Front

How does the presence of an inducer affect an operon?

Back

An inducer can bind to a repressor protein, preventing it from inhibiting the operon, thus allowing gene expression.

Front

What is the significance of enhancers in eukaryotic gene regulation?

Back

Enhancers can significantly increase the transcription of associated genes, even if they are located far away from the promoter.

Front

What is the role of RNA polymerase in gene expression?

Back

RNA polymerase is the enzyme that synthesizes RNA from a DNA template during transcription.