Gene Regulation and Variation

What is a TATA box? What does a TATA box do?

• A short region of DNA that contains a sequence of T and A base pairs. The protein that binds to this site helps position RNA polymerase.
• A group of genes that are regulated together.
• They control transcription. Some of these regulatory proteins help switch genes on,
  while others turn genes off.
• Regulate their activities, producing only those genes necessary for the cell
  to function.

The process through which cells become specialized in structure and function is

• Transcription
• Gene Expression
• Differentiation 
• RNA Interference

Tags

NGSS.HS-LS1-4

What is in the lac operon in E. coli?

• Three lactose genes
• Two lactose genes

The process of transcription produces a complementary strand of RNA on a DNA template

• False
• True

As an embryo develops, different sets of genes are regulated by

• mRNA and lac repressors. 
• promoters and operators.
• transcription factors and repressors.
• operons and operators. 

Tags

NGSS.HS-LS1-4

What is it called when these genes are operated together?

• Operator region
• Lac operon
• Lac repressor
• Promoter region

the lac operon has __________________ genes.

• 1

• 3

• 2

• 4

the lac operon is turned on

• when lactose is present

• lactose is absent

• cellulose is present

• protein is present

name the protein that binds to the operator

• RNA polymerase

• promoter

• enhancer

• repressor

the three genes on Lac operon helps in:

• digestion of fats

• digestion of galactose

• digestion of fiber

• fiber of lactose