and Answers
The Central Dogma of Biology
describes the flow of information in a cell
Flow of Information In a Cell
DNA-RNA-protein
What is the function of proteins?
carry out cell functions that are expressed as physical traits
DNA is synthesized in what direction?
5' to 3'
Replication is a _____________ process.
semi-conservative
Semi-Conservative
one strand of DNA serves as a template for a new strand of complementary DNA
Helicase
unwinds the DNA strands
Topoisomerase
relaxes supercoiling in front of the replication fork
DNA polymerase
requires RNA primers to initiate DNA synthesis
How does DNA polymerase synthesize new strands of DNA on the leading strand versus the lagging
strand? (part of elongation)
continuously on the leading strand; discontinuously on the lagging strand
Ligase
joins the fragments on the lagging strand
When does DNA replication occur?
during the "S" phase of the cell cycle
What does each copy of DNA have?