Gene Expression

Question 1

What characteristic do all cells and organisms possess in terms of gene expression?

Answer 1

Highly controlled

Question 2

In eukaryotic cells when can gene expression be regulated?

Answer 2

During transcription or RNA processing

Both occur in nucleus

Question 3

In prokaryotic cells when can gene expression be regulated?

Answer 3

During transcription only

Question 4

What are the 3 types of genes?

Answer 4

1. Constitutive genes
2. Regulatory gene
3. Structural genes

Question 5

What are constitutive genes?

Answer 5

Genes that are always switched on and transcribed continually

Question 6

What are regulatory genes?

Answer 6

Genes that code for transcription factors. These are proteins that help control gene expression during transcription phase to eithr induce or repress expressionof specific genes.

Question 7

What are structural genes?

Answer 7

Genes that code for proteins and RNA’s that create structural proteins, enzymes, etc.

Question 8

What additional section do genes in prokaryotic cells usually possess to help regulate gene expression?

Answer 8

Operator region
Found after promoter region and before start triplet.