Unit 8.1 Flashcards
What was the procedure/setup of the Griffith experiment?
They had four groups of mice with which they injected with different things. Group A got the S-Strain, B got the R-Strain, C got heat killed R-Strain and D got heat killed R-Strain and S-Strain.
What was the procedure/setup of the Avery, MacLeod, and McCarty experiment?
They took the bacteria that killed mice and put it in a centrifuge the heat killed it then removed different parts like proteins, RNA and DNA. Then if they transformation still occured then they knew that wasn’t the transformation factor.
What was the procedure/setup of the Hershey and Chase experiment?
They had two viruses, one with DNA inside and the other with a protein coat. They then put these viruses on bacteria then mixed them all up in a blender then used a centrifuge to separate the radioactive stuff from the non radioactive stuff.
What are the parts of a nucleotide?
A phosphate group, some kind of sugar and a nitrogenous base.
What is the structure of a DNA molecule?
They have base pairs in the middle and two phosphate sugar backbones wrapping around them like a ribbon. This means it is also double helix
What are some similarities between DNA and RNA?
They both have phosphate group, nitrogenouse base, and a sugar. They also both have A,C, and G bases and still make base pairs.
What are some differences between DNA and RNA?
DNA: Deoxyribose sugar, T-base, Double helix and is the storehouse for instructions.
RNA: Ribose sugar, U-base, Single strand, and is the synthesis of proteins.
Analyze the Griffith experiment
This experiment proved that there was some sort of transformation factor from one strain of bacteria to another.
Analyze the Avery, MacLeod, and McCarty experiment
This experiment showed that DNA was the transformation factor because the transformation didn’t occur when the DNA was destroyed. It still did when RNA, and proteins were destroyed though.
Analyze the Hershey and Chase experiment
The Hershey and Chase experiment looked at Proteins and Nucleic acids and found that the DNA injected itself into the bacteria and was the radioactive pellet and liquid. This proved indefinitely that the transformation factor was DNA and not proteins.
If a species has approximately 31% C, approximate % of the rest of the bases?
G= 31%
A= 19%
T=19%
