DNA Structure
What is DNA?
double helix
What base pairs with Adenine?
Thymine
What are enzymes?
the process in which DNA makes an identical copy of itself
replication
What are a phosphate group and deoxyribose sugar?
they make up a nucleotidealong with a nitrogenous base
What base does Guanine pair with?
Cytosine
region of an enzyme where the substrate binds
active site
what enzyme unzips the DNA double helix
helicase
What are deoxyribose sugar and phosphate?
The sides of the DNA ladder are made of alternating molecules of these two substances
If a sample DNA is 38% cytosine (C), what percent adenine (A) is it?
12%
molecules upon which an enzyme acts
substrate
what enzyme adds complementary nucleotides to a growing DNA strands
DNA polymerase
Who is James Watson?
This scientist, along with Francis Crick, is credited with proposing the double-helix model of DNA
If a DNA sample is 38% cytosine (C), what percent is guanine (G)?
38%
what is the process in which an enzyme loses its shape and function due to environmental changes
denaturation
which directions can DNA polymerase add new nucleotides to a growing DNA strand
5' to 3' direction
What is antiparallel?
DNA strands run in opposite directions, a property known by this term.
Which two bases are purines?
adenine and guanine
which enzyme adds complementary nucleotides to a growing DNA strand during replication
DNA polymerase
during DNA replication, what are the Y shaped regions where the DNA strands separate and replication occurs called?
replications forks