HUNT FOR GENETIC MATERIAL

Question 1

transforming principle was given by

Answer 1

Fredrick Griffith

Question 2

transforming principle was conducted on

Answer 2

mice and streptococcus pneumonia

Question 3

explain the transforming principle

Answer 3

killed s cells + live r cells = mice died
reason : genetic material transfer from s to r

Question 4

s or r strain of streptococcus pneumonia produce capsule

Answer 4

s cells

Question 5

biochemical characterization of genetic material was given by

Answer 5

McCarty
Macleod
Avery

Question 6

what was the experiment of McCarty Macleod & Avery

Answer 6

heat killed s cells (no lipid and sugar) + DNAase + r cells = no s cell characters

conclusion: transformation requires dna

Question 7

who’s experiment concluded DNA was the genetic material

Answer 7

Hershey & Chase

Question 8

Hershey & Chase conducted their experiment on

Answer 8

bac by bacteriophage

Question 9

explain Hershey & Chase experiment

Answer 9

⬛grew viruses on S35 (protien) and P32 (dna) mediums seperately (radioactive)
⬛transfer to E.coli seperately
⬛viral coats seperated by blender
⬛virus seperated by centrifugation method

obs: bac was infected by radioactive P
conclusion: dna is the infecting agent