Unit 3-Molecular Genetics Lesson 5 3.0

Question 1

What is a key feature of gene expression in prokaryotes?

Answer 1

Transcription and translation may occur simultaneously.

Question 2

How is gene expression different in eukaryotes compared to prokaryotes?

Answer 2

Transcription and translation are separated in time and space.

Question 3

Messenger RNA (mRNA) Characteristics and Key Functions (x 4)

Answer 3

Vary in length, depending on the gene that has been copied.
Act as the intermediary between the DNA and the ribosomes.
Is translated into proteins by ribosomes.
Is the RNA version of the gene encoded by DNA.

Question 4

Transfer RNA (tRNA) Characteristics and Key Functions (x 2)

Answer 4

Functions as the delivery system of amino acids to ribosomes as they synthesize proteins.
Is very short, only 70 to 90 base pairs long.

Question 5

Ribosomal RNA (rRNA) Characteristics and Key Functions (x 2)

Answer 5

Binds with proteins to form the ribosomes
Varies in length