Chapter 5 - DNA And Chromosomes
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Where can DNA be found in eukaryotes
Nucleus, mitochondria, and chloroplast
What is the building blocks of DNA
4 Deoxyribosenucleotide
What makes up the DNA strand
Sugar phosphate, base and nucleotide
What is the difference between the 4 deoxyribosenucleotide
The hydroxyl group
What does deoxynucleotides include
Phosphate group, 5c sugar deoxyribose and nitrogenous bases
How does DNA strands run
Antiparallel
Deoxynucleotides are held by
Phosphodiester bonds
Frederick Griffith’s transformation experiment, studied what
Streptococcus pneumoniae which is a pathogenic bacterium causing pneumonia
Frederick Griffith’s transformation contains how many and what strains And what are the 2 strains
2 stains of streptococcus S strain: R strain:
What strain of streptococcus is virulent
S strain
What strain of streptococcus is nonvirulent
R stain
Which strain of Frederick Griffith’s transformation experiment is virulent? And why?
S strain, Has protective polysaccharide capsule that protects bacterium from host immune system resulting in death of host
S strain
Smooth colonies
R strains
Rough colonies
Which strain in F. Griffith’s transformation is nonvirulent and why
R strain, lacks polsaccharide capsule that protects it and immune system attacks the strain
What did we learn from F. Griffith’s experiment
Our modern interpretation is that genetic material was actually transferred between the cells.
What happens when you inject a live s strain into healthy mouse
The mouse dies
What happens when you inject a live r strain into healthy mouse
The mouse lives
What happens when you inject a s strain that is heated into healthy mouse
The muse lives
What happens when you inject a live r strain and s strain that is heated, into healthy mouse
The mouse dies because the living pathogenic s strain recovers The strains initially is killed by the heat and its DNA survived the heating and its DNA was taking in by R strain.
The Avery Macleod Mcarty experiment demonstrated
That DNA was responsive for transformation
The Hersey chase experiment purpose
Wanted to determine which of these molecules is the genetic material that is injected into the bacteria
Hersey chase experiment used what
T2 bacteriophages
What are bacteriophages
Viruses which infects bacteria