Gene Expression Levels Quiz

At which level does the formation of the primary transcript occur in eukaryotic gene expression?

• Processing level

• Translational level

• Transcriptional level

• mRNA transport

Which molecule is formed after the transcriptional level in gene expression?

• Protein

• mRNA

• hnRNA

• DNA

Match the following conditions with their role in regulating gene expression.

• Conditions related to biochemical processes

• Only physiological conditions

• Conditions that are external to the organism

• Metabolic, physiological, and environmental conditions

• Conditions related to the body's internal functions

• Only metabolic conditions

• Conditions that include all aspects affecting gene expression

• Only environmental conditions

What is the role of the promoter in an operon?

• It binds RNA polymerase

• It codes for proteins

• It inhibits transcription

• It degrades mRNA

What is the sequence of components in the lac operon from left to right?

• Promoter, Operator, Structural genes

• Operator, Promoter, Structural genes

• Structural genes, Promoter, Operator

• Promoter, Structural genes, Operator

Which part of the lac operon is responsible for increasing the permeability of the cell to β-galactosides?

• z gene

• y gene

• a gene

• Operator

Which gene in the lac operon codes for transacetylase?

• z gene

• y gene

• a gene

• P

Which structural gene in the lac operon is responsible for coding β-galactosidase?

• z gene

• y gene

• a gene

• P

What happens to the lac operon in the absence of lactose?

• It is switched on.

• It is switched off.

• It produces more lactose.

• It synthesizes glucose.

What is the role of RNA polymerase in the lac operon?

• It binds with lactose.

• It binds with the promoter gene.

• It inhibits transcription.

• It degrades lactose.