4.1 DNA Flashcards
What was the objective of Griffith’s experiment? What did he determine?
To determine what happened so that the r-strain and heat killed s-strain are deadly. He determined that the r-strain acquired a dangerous component from the dead s-strain.
Why does a virus infect genetic material into a host cell?
Reproduction
What was the objective of the Hershey-Chase experiment? What did it determine?
To further determine if DNA is the cell’s genetic material, they determined that it is.
What was the objective of the Avery experiment? What did it determine?
They wanted to determine if DNA or protein was the transforming factor and therefore responsible for heredity. Determined that DNA is responsible for heredity, but still weren’t sure.
What is Chargaff’s first rule?
Adenine=thymine, cytosine=guanine
If a species has approximately 20% C, approximate the % of the rest of the bases.
20% G, 30% T, 30% A
What are the parts of a nucleotide?
phosphate group, sugar, nitrogenous base
what bonds create the sugar/phosphate backbone?
hydrogen bonds
Why are hydrogen bonds broken when DNA is copied?
They are weaker than covelent bonds that connects the base pairs.
How do you find the 3’ carbon and the 5’ carbon?
