« previous next »

Author Question: E. coli cells grown on 15N medium are transferred to 14N medium and allowed to g (Read 1253 times)

camila

  • Hero Member
  • *****
  • Posts: 705
on: Jun 23, 2013
E. coli cells grown on 15N medium are transferred to 14N medium and allowed to grow for two more generations (two rounds of DNA replication). DNA extracted from these cells is centrifuged. What density distribution of DNA would you expect in this experiment?
A) one high-density and one low-density band
B) one intermediate-density band
C) one high-density and one intermediate-density band
D) one low-density and one intermediate-density band
E) one low-density band


formula1

  • Hero Member
  • *****
  • Posts: 666
Reply #1 on: Jun 24, 2013
We did this yesterday, it's D.


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question

camila

  • Hero Member
  • *****
  • Posts: 705
Reply #2 on: Jul 1, 2013
GOLD :D Thanks so much!!


« previous next »
 

Did you know?

Fatal fungal infections may be able to resist newer antifungal drugs. Globally, fungal infections are often fatal due to the lack of access to multiple antifungals, which may be required to be utilized in combination. Single antifungals may not be enough to stop a fungal infection from causing the death of a patient.

Did you know?

Though the United States has largely rejected the metric system, it is used for currency, as in 100 pennies = 1 dollar. Previously, the British currency system was used, with measurements such as 12 pence to the shilling, and 20 shillings to the pound.

Did you know?

No drugs are available to relieve parathyroid disease. Parathyroid disease is caused by a parathyroid tumor, and it needs to be removed by surgery.

Did you know?

Thyroid conditions cause a higher risk of fibromyalgia and chronic fatigue syndrome.

Did you know?

If all the neurons in the human body were lined up, they would stretch more than 600 miles.

Nondisjunction during the formation of haploid cells. Nondisjunction during the formation of haploid cells.
Nurse bees tending to brood in cells both open and capped with beeswax. Nurse bees tending to brood in cells both open and capped with beeswax.
Adult stem cells offer hope for cell therapy to treat diseases in the future Adult stem cells offer hope for cell therapy to treat diseases in the future
Microscopic view of plant cells Microscopic view of plant cells
Imaging cell surface glycoproteins in living cells Imaging cell surface glycoproteins in living cells
Structure of the E. coli Tus protein, complexed with double-stranded DNA Structure of the E. coli Tus protein, complexed with double-stranded DNA
Video: Regulation of GFR: autoregulation via myogenic mechanism Myogenic mechanism

For a complete list of videos, visit our video library