4.2.4 Eukaryotic Transcription

Question 1

The genome within eukaryotic cells contains many

Answer 1

non-coding sections

Question 2

Non-coding DNA can be found between genes, as

Answer 2

non-coding multiple repeats

Question 3

Non-coding DNA can be found within genes, as

Answer 3

introns

Question 4

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

Answer 4

pre-mRNA molecules

Question 5

pre-mRNA contains

Answer 5

the introns and exons of a certain gene

Question 6

Before the pre-mRNA exits the nucleus

Answer 6

splicing occurs

Question 7

The non-coding sections are

Answer 7

removed

Question 8

The coding sections are

Answer 8

joined together

Question 9

The resulting mRNA molecule carries only

Answer 9

the coding sequences (exons) of the gene

Question 10

mRNA contains only

Answer 10

exons and exits the nucleus before joining a ribosome for translation

Question 11

Image showing the splicing of pre-mRNA before it exits the nucleus

Answer 11

Question 12

The exons (coding regions) of genes can be spliced in many different ways to produce different mature mRNA molecules through

Answer 12

alternative splicing

Question 13

Alternative splicing means that a single eukaryotic gene can code for more than one

Answer 13

polypeptide chain

Question 14

Image showing the alternative splicing of a gene to produce two different proteins

Answer 14