222 Operon worksheet KEY - BSCI222 Shields Below are a series of questions that will hopefully help you understand operons Check your answers with the

222 Operon worksheet KEY - BSCI222 Shields Below are a...

This preview shows page 1 - 3 out of 3 pages.

BSCI222 Shields Below are a series of questions that will hopefully help you understand operons. Check your answers with the key that will be posted online. REMEMBER - this will only help you if you attempt to do this WITHOUT looking at the answer key first. 1. For each of the growth conditions listed, draw the lac operon. Include the promoter, operator, lac gene, sugar molecule and repressor protein. a) no Glucose, lots of Lactose b) no Lactose, lots of Glucose
Image of page 1
BSCI222 Shields 2. A repressible operon is contains three genes, A, B and C. One is the operator, one is the repressor protein and the third is a structural enzyme involved in the synthesis of the end product. Operon genes are synthesized when the end product is NOT available. In the table below, "+" means that the enzyme is synthesized by the operon, and "-" means that no enzyme production occurs. Use this information to determine which gene corresponds to which function. Enzyme Synthesis Genotype with end product present with end product absent 1 A + B + C + - + 2 A - B + C + + + 3 A + B - C + - - 4 A + B + C - + + 5 A - B + C + /A + B - C - + + 6 A + B - C + /A - B + C - + + 7 A + B + C - /A - B - C + - +
Image of page 2
Image of page 3

You've reached the end of your free preview.

Want to read all 3 pages?

  • Fall '13
  • trp operon, structural gene

  • Left Quote Icon

    Student Picture

  • Left Quote Icon

    Student Picture

  • Left Quote Icon

    Student Picture

Stuck? We have tutors online 24/7 who can help you get unstuck.
A+ icon
Ask Expert Tutors You can ask You can ask You can ask (will expire )
Answers in as fast as 15 minutes