DNA: the molecule of Life
____________ ______________research was
used in the discovery of DNA structure
____________ & _______________
developed the first model of DNA
Watson & Crick concluded that all living cells
contain DNA
In prokaryotic cells, where is the DNA located?
_______________________________
In Eukaryotic cells, where is the DNA located?
________________________________
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______________ – DNA tightly wrapped around proteins (histones)
________________ supercoils to form chromosome
Chromosome are visible during_____________
Chromosomes are found inside the ____________
Chromosomes contain genes and genes are made up of _____________
The genetic material (DNA) determines how an organism develops.
How? The ___________________ (nitrogen bases) determine the________ of an organism.
DNA’s two main functions are to . . .
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Store and maintain _____________________________________ information.
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Provide the instructions for building _______________________________.
DNA stands for
a.) Deoxyribonucleic acid
b.) Directnucleic amino sequence
c.) Deoxisis Nitrate Acid
DNA is a ______________ - like a twisted rubber ladder made from three main components (like legos)
• Sides of the ladder are composed of alternating
__________and ____________pieces
• Each “rung” of the ladder is made up of two
complementary ___________
– A complements ______
– C complements ______
• DNA is put together in chunks called
__________________
– Each nucleotide has a sugar, PO43- and base
______________= The copying of DNA prior to the
cell undergoing division
DNA strands are ___________________- that is
each strand can be used to make the other strand.
DNA ___________ comes on the scene binds and
• ___________ the DNA upstream
• ____________ the hydrogen bonds between
the base pairs.
• This site is known as the
__________________________
DNA single-stranded binding proteins stabilize the
single strand structure.
The sites on DNA where separation and replication
occur are called _________________.
Replication takes place in both directions until each
chromosomes is completely copied. In a
____________ direction.
There are two replicating strands the __________ strand and the __________ strand. The
leading strand moves in a forward motion. The lagging strand move in a backwards motion.
• _______________________ joins individual nucleotides to produce a DNA molecule,
which is a polymer.
• Complementary Bases begin adding into both sides of the double strand of DNA
• A binds with _______, C binds with _______ (no other possibility because of the shape
of the bases!)
• The final job of the Polymerase is to ____________the sequence of nucleotides after
they are added (back on the 5’ end) and to clip out any that are incorrectly paired
nucleotides.
Finally you have 2 ______________________ of double stranded DNA
• The original strand serves as a _______________ for the new strand
• The resulting DNA molecules are made up of one ___________(original) strand
and one_____________ (new) strand