first test Flashcards
who are the scientist responsible for the current model of DNA
Francis crick and james watson
a second experiment was done making the DNA or the protein of bacteriophages radioactive the result showed that the genetic chemical must be what
DNA
what did Rosalind franklin and Maurice wilking use to help reveal the structure of DNA
X-RAY
IF the sequence of bases on one side of the DNA molecule is GATC, the correct sequence of bases on the other side is what
CTAG
the upright of DNA molecule are composed of ____ paired with a _____________
Purine and Pyrimidme
The rungs of DNA ladder are composed of What
Nitrogen bases
In DNA four forms of the molecule each have a different type of what
Nitrogen bases
The part of the molecule for which deoxyribonucleic acid is named is the
Surgar
Chemic analysis finds that 20% of the bases from a certain organism is Guanine what amounts of other bases would you expect to find in this particular DNA
Adenine=30
thymine=30
cytosine=25
THer term replication refers to DNA’s ability to do what
Copy itself
Put the events of replicating in order (bond backbone, unzip, uncoil, and add new nucleotides)
Uncoil. unzip, add nucleotides, bond backbone
In the life cycle of a cell DNA replication occurs during which phase
S-phase
The process by which DNA polymerase is able to correct mismatched nucleotides is called what
Proof reading
The replication of a double stranded DNA molecule begins when what unwinds the DNA and breaks what
DNA helicase and hydrogen bonds
Because there any many replication forks within a single DNA molecule, replication tends to do what
Replicate faster
What is the final result of DNA replication
2 enzymes
why is the DNA repair sequence important to an organism’s survival
Correct mutation
In gel Electrophoresis the DNA moves from one end of the gel to the other because the DNA is ________ charged
Negativly
In gel electrophoresis the DNA separates because the _______ Fragments move farther than the ________ fragments
smaller large
what is deoxyribose
a sugar derived from ribose by replacing
what is adenine
a compound which is one of the four constituent bases of nucleic acids
what is phosphates
a salt or ester of phosphoric acid
what is nucleus
typically a single rounded structure bounded by a double membrane
what is thymine
a compound which is one of the four constituent bases of nucleic acids
