8.1 Flashcards
(24 cards)
What happened when the live S strain was injected into mice?
They died.
What happened when the live R strain was injected into mice?
They lived.
What happened when heat killed S strain was injected into mice?
They lived.
What happened when heat killed S strain and live R strain was injected into mice?
They died.
What did Griffith’s experiment determine about the transforming factor?
It needed more experimentation to identify.
When protein was destroyed, did transformation happen?
Yes.
When RNA was destroyed, did transformation happen?
Yes.
When DNA was destroyed, did transformation happen?
No.
Why didn’t scientists believe DNA was responsible for heredity?
DNA seemed too simple to be responsible.
What was radioactive phosphorus used to tag?
DNA
What was radioactive sulfur used to tag?
Protein.
In bacteriophages, what is the shell made of?
Protein.
In bacteriophages, what is stored in the shell?
DNA.
What did the transforming factor turn out to be?
DNA.
What is true by Chargaff’’s first rule?
A=T and C=G.
What disease was Griffith researching?
Pneumonia.
Why does a virus infect genetic material into a host cell?
That’s how they reproduce.
What was the independent factor in the Hershey-Chase experiment?
Which molecule was radioactively tagged.
What was the dependent factor in the Hershey-Chase experiment?
Whether or not radioactivity is found in the bacteria.
What’s Chargaff’s second rule?
A,C,T,G differs between species.
What are the parts of a nucleotide?
Sugar, phosphorus, nitrogenous base
What is the structure of a DNA molecule?
Two strands in a double helix.
What are the similarities between DNA and RNA?
Phosphate, nitrogenous base, pentose, sugar, A, C, and G
What part of a DNA molecule is not always the same?
Nitrogenous base.
