Eukaryotic Transcription

Question 1

The genome within eukaryotic cells contains many non-coding sections

Non-coding DNA can be found:

Answer 1

Between genes, as non-coding multiple repeats

Within genes, as introns

Question 2

During transcription, eukaryotic cells transcribe the whole gene (all introns and exons) to produce

Answer 2

pre-mRNA molecules

pre-mRNA contains the introns and exons of a certain gene

Question 3

Before the pre-mRNA exits the nucleus, splicing occurs where what happens

Answer 3

The non-coding sections are removed

The coding sections are joined together

The resulting mRNA molecule carries only the coding sequences (exons) of the gene

mRNA contains only exons and exits the nucleus before joining a ribosome for translation

Question 4

The exons (coding regions) of genes can be spliced in many different ways to produce different …………. which is a process called what

Answer 4

different mature mRNA molecules through alternative splicing

Question 5

This means that a single eukaryotic gene can code for

due to alternative splicing

Answer 5

more than one polypeptide chain

This is part of the reason why the proteome is much bigger than the genome