The hydrogen bonding of cytosine to guanine is an example of complementary base pairing.
Adenine always pairs up with guanine in DNA, and cytosine always teams up with thymine.
Each of the four nucleotides in a DNA molecule has the same nitrogen-containing base.
When adenine base pairs with thymine, they are linked by three hydrogen bonds.
In the DNA of all species, the amount of purines never equals the amount of pyrimidines.
Each DNA strand has a backbone the consists of alternating
purines and pyrimidines
nitrogen-containing bases
hydrogen bonds
sugar and phosphate
amines and purines
The appropriate adjective to drescribe DNA replication is
nondisruptive
semiconservation
progressive
natural
lytic
Replication of DNA
produces RNA molecules
produces only new DNA
produces two molecules, each of which is half- new and half - old DNA joined lengthwise to each other.
generates excessive DNA, which eventually causes the nucleus to divide.
is too complex to characterize
This is an image of a(n) ______.
amino acid
nucleic acid
DNA
nucleotide
The letter A indicates a ________.
phosphate group
nucleotide
nitrogen base
sugar
none of the above
A nitrogen base is indicated by the letter
a
b
c
d
Nucleic acids are assembled in the ______ direction.
1' ....5'
2'... 3'
5'...3'
4'...5'
5'...1'
Match the following enzyme to its description.
helicase
Joins the 3’ end of DNA that replaces primer to rest of leading strand and joins Okazaki fragments of lagging strand
DNA ligase
Removes RNA nucleotides of primer from 5’ end and replaces them with DNA nucleotides
Primase
Binds to and stablizes single stranded DNA until it can be used as a template.
DNA polymerase I
Synthesizes an RNA primer at 5’ end of leading strand and of each Okazaki fragment of lagging strand
Single Stranded Binding Proteins
Using parental DNA as a template, synthesizes new DNA strand by covalently adding nucleotides to the 3’ end of a pre existing DNA strand or RNA primer.
DNA polymerase III
Unwinds parental double helix at replication forks
