A level Biology - Control of gene expression

The structural genes and control regions involved in the control of lactose metabolism

• Lactose operator

• Lac operator

• Lac operon

The repressor protein binds to the operator region when.....

• Lactose is present

• lactose is not present

• Glucose and lactose are present

Within the operon, RNA polymerase binds to.......

• The regulatory gene

• The operator region

• The promoter region

The channel protein that facilitates the diffusion of lactose is.......

• L galactosidase

• Lactose permease

• Lactose diffusase

An enzyme that breaks down lactose is called

• B galactosidase

• L galactosidase

• B lactosidase

• L lactosidase

Lactose is broken down into ......

• Glucose and ribose

• Galactose and fructose

• glucose and fructose

• Glucose and galactose

Genes that code for proteins involved in the control of transcription

• Regulatory genes

• Structural genes

• Transcription genes

What is the correct order of regions on the lac operon?

• Operator, structural genes, promoter

• Promotor, operator, structural genes

• operator, promoter, structural genes

The homeobox genes code for an area on a protein called.....

• Hox domian

• Homeiotic domain

• Homeodomain

How many long is the sequence of DNA in in a homeobox ?

• 160 bp

• 180 bp

• 60 bp