Chapter 12 Deck 2 (Slides 5-8 Flashcards
THE ____-_____ EXPERIMENT – 1952 Wanted to verify Avery’s experiment and prove that genes were made of DNA
HERSEY-CHASE
The Hersey-Chase Experiment Studied ______: viruses that infect bacteria
BACTERIOPHAGES
BACTERIOPHAGES are viruses made of ____CORE surrounded by a ____COAT
DNA
Protein
when a virus enters a bacterium cell it attaches to the cell’s membrane and injects it’s _____
genes
viral genes _____the bacterium cell and cause it to produce 1000’s of new viruses
hijack
After being infected the bacterium cell fills with viruses and ____s, releasing viruses to go infect new cells
bursts
Hersey and Chase wanted to see if GENES were made of ___ or ____
DNA
Proteins
In the Hersey-Chase experiment, they made 2 types of radioactive viruses:
) 1 that contained radioactive _____ (in DNA but not protein)
2) 1 that contained radioactive ______(in proteins but not DNA)
phosphorus
sulfur
If after the bacteriophage viruses infected the bacteria, The bacteria’s cytoplasm contained radioactive PHOSPHORUS (P)
then the virus’s genes were made of ___
DNA
If after the bacteriophage viruses infected the bacteria, The bacteria’s cytoplasm contained radioactive SULFUR (S)
then the virus’s genes were made of ____
protein
The Hersey-Chase Experiment found that the bacteria contained radioactive _____, which meant that genes are made of ___
Phosphorus (P)
DNA
Genes are known to do 3 things:
- Carry _____ from one generation to the next
information
Genes are known to do 3 things:
- Put the information passed from 1 generation to the next to work by determining the heritable ____ of the organism
traits
Genes are known to do 3 things:
- Be easily ____ (all of a cell’s genetic info is replicated each time a cell divides)
copied
In the 1940’s and 1950’s , the leading biologists thought of DNA as little more than a string of ______
NUCLEOTIDES
