Protein Synthesis Round 4

TRANSCRIPTION

4

During initiation’s transcription, what does RNA polymerase bond to?

Promoter region

8

True or false: the direct product of transcription in protein synthesis is mRNA?

false: premRNA

12

What does RNA polymerase un bond with during the transcription stage of termination? 

DNA

16

What are the two things that occur in the last step of transcription’s termination? 

the DNA nitrogen bases reattach and the DNA strands retwist into a double helix

RNA PROCESSING

4

What is a ribosomal RNA that acts as a catalyst for chemical reactions?

a ribozyme

8

During what process are introns removed and exons added? 

RNA splicing

12

DOUBLE POINTS: every extra question answered gains 3 additional spaces forward

1. How many steps does RNA processing take to convert premRNA to mRNA? 
2. Name one of these steps.

1. 4
2. Answers will vary: Splicing/removing of introns, Connecting/bonding of exons, Adding a poly A tail, Adding a 5’ cap.

16

What are the 2 reasons why GTP is added to the 5’ end of premRNA?

It provides energy and allows premRNA to bond to the small subunit of the ribosome

TRANSLATION

4

At what site is the tRNA released?

E site

8

DOUBLE POINTS: every extra question answered gains 4 additional spaces forward

1. Which process uses mRNA’s directions to assemble amino acids with the help of tRNA and ribosomes? 
2. Where does this process occur?

1. translation
2. in the ribosome

12

What does the translation initiation complex include? 

tRNA, mRNA, the small and large subunits of the ribosome

16

How does the translation initiation complex form?

Large subunit locks onto the small subunit placing the mRNA on the P site