Thursday, 15 November 2018

nov 29 TEST: STUDY QUESTIONS FOR TRANSCRIPTION AND TRANSLATION

HERE'S A GREAT WEB REVIEW
http://www.phschool.com/science/biology_place/biocoach/transcription/intro.html

 AND PLEASE ANSWER THESE STUDY QUESTIONS
  1. What is the central dogma of molecular biology?   DNA--> mRNA --> polypeptide
  2. Explain what is meant by the term transcription.
  3. What is the function of RNA polymerase?
  4. Explain what it means for transcription and translation to be coupled.
  5. In what organisms are these processes coupled?
  6. Explain why these processes are coupled.
  7. Where do these processes occur in eukaryotic organisms?
  8. What is a pre-mRNA molecule?
  9. What happens to this pre-mRNA molecule?
  10. What then happens to the mature mRNA molecule?
  11. Are all genes transcribed into RNA? Explain
  12. Give the name and function of the following:
    • mRNA
    • tRNA
    • rRNA
    • snRNA
  13. Diagram a protein coding gene and label it correctly.
  14. Explain what a promoter is and what it does.
  15. Explain what a coding sequence is and what it does.
  16. Explain what a terminator is and what it does.
  1. Give the purine and pyrimidine bases for RNA.
  2. Give the name and structure for the sugar in RNA.
  3. Explain how a DNA and an RNA nucleotide are different.
  4. How are the 2’ ends of DNA and RNA different?
  5. What does RNA synthesis involve?
  6. What does the complement strand of RNA look like if the DNA strand were the following: ATGC
  7. Which direction does this process take place in?
  1. Explain where transcription begins and ends.
  1. Explain what happens at the 5’ end of a pre- RNA molecule.
  2. Explain what happens at the 3’ end of a pre- RNA molecule.
  3. What is the 5’cap used for?
  4. What is the 3’ cap used for?
  5. Explain what an intron and an exon are.
  6. Explain what happens in RNA processing.
  7. Give another name for pre-RNA splicing.
  8. Give the three steps in this process.
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