Chapter 8--> From DNA and Protein Flashcards
Who found a ‘transforming principle’
Fredrick Griffith
S form is deadly while the R form was
Not deadly
What happened to the mouse injected with heat killed S bacteria?
The mouse died
Oswald Avery
identified DNA as the transforming principle
Avery isolated and…
Purified Griffith’s transforming principle
Alfred Hershey and Martha Chase confirmed that…
DNA is the genetic material
Hershey and Chase studied viruses that…
infect bacteria, or bacteriophages
Tagged DNA was found inside the bacteria;
tagged proteins were not
DNA structure is the…
same in all organisms
DNA is composed of what four types of nucleotides
- Phosphate Group
- Deoxyribose Sugar
- Nitrogen-containing base
What are the four nitrogen changing bases?
1.Thymine
2.Adenine
3.Cytosine
4.Guanine
Double Helix is made up of a…
Sugar-phosphate backbone on the outside with bases on the inside
A=
T
C=
G
The backbone is connected by…
Covalent bonds
Pyrimidine (single ring) pairs with…
Pyrimidine (double ring)
The bases are connected by…
Hydrogen bonds
A and G are what kind of bases?
Purine
T and C are what kind of bases?
Pyrimidine
Adenine and Guanine are composed of how many rings?
Two
Thymine and Cytosine are composed of how many rings?
One
DNA is what kind of acid?
Deoxyribinucleic Acid
RNA is what kidn of acid?
Ribonucleic Acid
What is DNA?
A self replicating material that is present in nearly all living organisms- carries genetic information
What is RNA?
A nucleic acid present in all living cells- is to act as the messenger carrying instructions from DNA for controlling synthesis of proteins
How many strands does DNA have? What kind of helix is it?
2 strands, double helix
DNA is held together by what kind of bonds?
Hydrogen
What is the DNA nucleotide made up of?
Deoxyribise, phosphoric acid and nitrogen containing bases
How do DNA molecules match up?
