Exons and Introns

Question 1

DNA contains the information for making

Answer 1

-polypeptides

Question 2

The RNA version of the code is first made from

Answer 2

-the DNA

Question 3

In prokaryotes RNA is

Answer 3

-mRNA and directs the synthesis of the polypeptide

Question 4

In eukaryotes the RNA has to be (_____) before it can be used to (_________) the polypeptide

Answer 4

-processed
-synthesis

Question 5

RNA in eukaryotes

Answer 5

-initial RNA version of the code is much longer than the final mRNA and contains a sequences of bases that have to be removed

Question 6

Name of the final mRNA that contains the sequences of bases that are to be removed

Answer 6

-introns

Question 7

What happens to the introns when cut from the pre mRNA?

Answer 7

-not translated into proteins
-introns cut out using endonucleases

Question 8

Sequence left after the introns are removed from the pre-messenger mRNA?

Answer 8

-exons that are joined together with ligases