Chapter 10 #2 Flashcards
Define a nucleotide.
Nucleotides are the building blocks for nucleic acids.
What does a nucleotide consist of?
- Nitrogenous base
- 5 Carbon Sugar
- Phosphate group
What are the purines of DNA?
Adenine, Guanine
What are the pyirmidines of DNA?
Cytosine, Thymine
Pyrimidines have _____ ring(s), purines have _____ ring(s)
one, two
List A-E in order.
1’, 2’, 3’, 4’, 5’
What does Adenine (A) always pair with?
Thymine (T)
What does Guanine (G) always pair with?
Cytosine (C)
What did the Hershey-Chase experiment do and find?
The experiment used bacteriophages to show that DNA is the genetic material of T2, a virus that infects E.coli. In the experiment, the phases were labeled with radioactive sulfur to detect proteins or radioactive phosphorus to detect DNA. Bacteria were infected with either type of phage to determine which substance was injected into cells and which remained outside the infected cell.
Define prions.
Prions are misfolded proteins that can cause diseases in humans and change normal proteins and make them abnormally fold.
What model does DNA replication follow?
A semi conservative model
Define the semi conservative model of DNA.
The semi-conservative model of DNA states that when DNA copies, the two DNA strands separate and each new DNA helix has one old strand with one new strand.
Which people came up with the semi conservative model of DNA?
Meselsohn and Stahl
What is at the point described here?
Origin of replication
What is at the point described here?
Replication fork
What is at the point described here?
Replication bubble
