genetics homework

Anonymous
timer Asked: Nov 28th, 2018
account_balance_wallet $5

Question description

I have homework of genetics I did more than half of it , it's easy though less than a page of questions cuz I did almost all of the sheet. That's it

Tutor Answer

danielarodc
School: New York University

Attached.

BIOL209: Operons
Name(s): Ana Alsulaim

Section: 001

Part I: Lac Operon
1.

What happens to transcription at the lac operon when glucose levels are low, and lactose is present? Why?

Lower glucose level leads to increased cAMP level. cAMP readily binds to CAP. CAP – AMP complex binding leads to
increased RNA polymerase binding and result in increased level of transcription.

2.

Illustrate it. Include: RNA polymerase, repressors, and any other molecules needed to show how it works.

GENE TURNED ON

3. What happens to transcription at the lac operon when glucose levels are high, and lactose is absent? Why?
When glucose is high, level of cAMP decreases, as a result cAMP cannot bind to CAP. They do not bind to DNA. As
a result, level of transcription is low and glucose production is stopped.

4. Illustrate it. Include: RNA polymerase, repressors and any other molecules needed to show how it works.

GENE TURNED OFF

Circle the correct answer:
5. Most of the time this operon is turned
6. The lac operon is a REPRESSIBLE

ON

OFF.

INDUCIBLE
...

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Review

Anonymous
Wow this is really good.... didn't expect it. Sweet!!!!

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