Ask Question, Ask an Expert


Ask Biology Expert

Hershey and Chase intended to see if it's the viral DNA or the viral protein coat that enters bacteria upon infection with bacteriophage (virus infecting bacteria). By determining this they could tell which component of virus actually carries the genetic information and results in formation of more viruses with in the bacterium that they have infected.

With this intention in mind they took two sets of bacteriophages (called T2 virus). One set had its DNA labeled with radioactive phosphorus and the other set had its protein coat labeled with radioactive sulfur. These two sets were allowed to infect E Coli bacteria separately.

After infecting with the bacteriophages, the two batches of E Coli were mixed in a blender to shove off any viral remnants attached to the bacterial surface.

Each mixture was subjected to centrifuge to separate the heavier bacteria in the form of a pellet from lighter viral remnants.

Radioactivity was checked in both the batches. In sulphur labeled group the radioactivity was detected in the supernatant-the lighter liquid. This meant that the sulphur coated protein coat of the bacteriophages didn't enter the bacterial cells. On the other hand, the phosphorus coated group showed radioactivity in the pellet - the bacterial residue.

This experiment showed that its the viral DNA that enters the bacterial cell and multiplies with in to form more viruses.

Biology, Academics

  • Category:- Biology
  • Reference No.:- M925872

Have any Question? 

Related Questions in Biology

Biology class must cite work must be 250 wordsyoutube url

Biology class. Must cite work, must be 250 words. YouTube URL: Dieters often talk about their metabolism. What is metabolism? Catabolism? Anabolism? Total metabolic rate (TMR)? ...

Biology1 a plant with red flowers is crossed with a

Biology 1. A plant with red flowers is crossed with a white-flowered plant of the same species. All the seeds, when grown, produce plants with red flowers. Assuming that the flower color is controlled by a single pair of ...

Ethical decisions in the workplaceafter reading your

Ethical Decisions in the Workplace After reading your background readings, please review the following scenario and address the questions at the end. Jerry Stevens heads up an excavation crew for the municipal utilities ...

Lab an introduction to genetic processespart a dna

Lab: An Introduction to Genetic Processes Part A: DNA Replication and Protein Synthesis and Sources of Variability Exercise Exercise 1 . Illustrate your understanding of complimentary bases and DNA Replication by providi ...

Positive and negative controls in scientific experimental

Positive and Negative Controls in Scientific Experimental design What are positive and negative controls? (Give definition and example) When is it useful to use positive or negative controls? (mast has 2 figures) What ar ...

Genetics and inheritancereview information on genetic

Genetics and Inheritance Review information on genetic disorders on the National Human Genome Research Institute Site: Choose a genetic disorder that can be inherited from a parent. Write a 525- to ...

Depletion of nadph and glutathione in cells is considered

Depletion of NADPH and glutathione in cells is considered harmful. Explain why, and give an example of a chemical that may deplete NADPH and glutathione through interaction with the FMO enzyme. The FMO3 enzyme has an imp ...

Assignmentsimmunology1st assignmentsection ithe following

Assignments Immunology 1st Assignment Section I. The following Topics 1-3 (of 4) cover the cell isolation protocols from Units 1 & 2: Assigned Appendix readings; Isolation of human monocytes by double gradient centrifuga ...

1 which karyotypes shows a normal male individual ie a male

1. Which karyotype(s) shows a "normal" male individual (i.e., a male individual with no trisomies or monosomies)? A. A and B B. B only C. C only D. D only E. A, B, C & D 2. Which karyotype(s) shows an individual with Tur ...

1 the results of the study of the occurrence of

1. The results of the study of the occurrence of tuberculosis (TB) in a village in Malawi are given in the table below. All individuals in the village were examined during two surveys made two years apart. Assume that th ...

  • 4,153,160 Questions Asked
  • 13,132 Experts
  • 2,558,936 Questions Answered

Ask Experts for help!!

Looking for Assignment Help?

Start excelling in your Courses, Get help with Assignment

Write us your full requirement for evaluation and you will receive response within 20 minutes turnaround time.

Ask Now Help with Problems, Get a Best Answer

A cola-dispensing machine is set to dispense 9 ounces of

A cola-dispensing machine is set to dispense 9 ounces of cola per cup, with a standard deviation of 1.0 ounce. The manuf

What is marketingbullwhat is marketing think back to your

What is Marketing? • "What is marketing"? Think back to your impressions before you started this class versus how you

Question -your client david smith runs a small it

QUESTION - Your client, David Smith runs a small IT consulting business specialising in computer software and techno

Inspection of a random sample of 22 aircraft showed that 15

Inspection of a random sample of 22 aircraft showed that 15 needed repairs to fix a wiring problem that might compromise

Effective hrmquestionhow can an effective hrm system help

Effective HRM Question How can an effective HRM system help facilitate the achievement of an organization's strate