Topic 3 - Genetic Code

Question 1

What is Transcription

Answer 1

The process of forming complementary copies of mRNA from sequences of DNA that code for a particular polypeptide or protein

Question 2

What is the function of DNA helicase in Transcription

Answer 2

It separates the two DNA strands of the relevant section of the DNA to be copied, by breaking hydrogen bonds

Question 3

What is the function of RNA polymerase in Transcription

Answer 3

It moves along the template strand linking the nucleotides in the exposed strand with free complementary RBA nucleotides from the nucleotide pool

Question 4

What bonds form between adjacent mRNA nucleotides

Answer 4

Phosphodiester bonds

Question 5

What are introns and exons in eukaryotic cells

Answer 5

Exons are coding regions
Introns are non-coding regions

Question 6

How is pre-mRNA converted to mRNA

Answer 6

Introns are cut out and the remaining exons are joined together

Question 7

Where does the final version of mRNA go once fully converted

Answer 7

It passes out of the nucleus through a pore in the nuclear envelope where it moves to a ribosome, where the synthesis of protein takes place