Flashcards in DNA is heritable material Deck (22):
In 1928, he was credited with recognizing TRANSFORMATION in bacteria.
In what year did Griffith discover the pneumoniae shit?
Disease-causing (pathogenic) baterium causing pneumonia
The _____ is a virulence factor.
What are the 2 strains of streptococcus?
1. Pathogenic (capsule; virulent) S-strain
2. Non-pathogenic (capsule-free; non-virulent) R-strain
What is pathogenic strain?
What is non-pathogenic strain?
Transformation adds new pieces of genes to live bacterial cells
The transfer of information is called ___.
Transforming bacteria nowadays is to insert foreign DNA into bacteria to allow microbe to produce molecule like ______ & ______.
Human growth hormone
Two macromolecules became candidates for genetic material when it was shoed that genes were located on chromosomes. What are they?
DNA (4 different monomers)
Protein (20 different monomers)
When did Avery, MacLeod, & McCarty repeat Griffith' experiment?
In 1944, Griffith's experiemtn was repeated by whom?
Avery, MacLeod, & McCarty
What did Avery, MacLeod, & McCarty discover?
degradation of protein did not destroy its ability to transform Rstrain cells but degraded DNA destruyed all transforming ability
What is Avery, MacLeod, & McCarty's conclusion?
The molecule that carries the heritable information is DNA.
In what year did Hershey and Chase did their discovery?
What did Hershey and Chase discover?
performed experiments showing that DNA is the genetic material of a phage known as T2 with blender experiment
Viruses that infect bacteria.
What composes bacteriophage?
DNA packed inside head and protein making up the outer coat
How to distinguish DNA from protein?
Protein: some amino acids contain sulfur,but NEVER phosphorous
DNA: have phosphorous , but NEVER sulfur
Only the bacteriophage ____ entered the bacteria