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 DNA stands for - PowerPoint PPT Presentation

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What Is DNA?.  DNA stands for _______________ ________________ ________ and is the basic substance of heredity. DNA is a set of ____________ for building your body and controls everything about the way you ____ and ________. WHERE IS THE DNA STORED?.

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What Is DNA?

 DNA stands for

_______________ ________________ ________ and is the basic substance of heredity.

DNA is a set of ____________ for building your body and controls everything about the way you ____ and ________.

where is the dna stored

The DNA is stored in the _______ of nearly all your cells.

get it watson and crick what s in the creek
(Get it…Watson and Crick? What’s in the creek?)

What’s in the creek?

  • In ____, James ______ and Francis _____ figured out the structure of ___. Their discovery revealed important information about how DNA ________ itself.

These scientist won a Nobel Prize in 1962 for work on the DNA’s structure.

_________________ was actually the 1st scientist to produce the ________ of DNA , but died before the Nobel Prize was given.


The Structure of DNA

A DNA ________ looks like a twisted ladder. Because of its shape, a DNA molecule is often called a “_______ _____.” A helix is a shape that ______.

the dna double helix molecule
The DNA “Double Helix” Molecule

*Looks like a twisted ladder

*The sides of the ladder are made of _______________ and _____________>

*The rungs of the ladder are formed by pairs of ______________. Nitrogen bases are molecules that contain the element _________ and other elements.

Within the nucleus of every cell are long ________ of DNA, the ____ that holds all the information needed to ____ and ________ every cell within a living organism.
The two sides of the DNA ladder are made up of molecules of a sugar called ______________, alternating with molecules known as _____________________.
There are four kinds of nitrogen bases: __________ (ad uh neen), ______________ (thy meen), _________________ (gwah neen), and ______________ (sy tuh seen). The capital letters A, T, G, and C are used to represent the four bases.
nitrogen bases
Nitrogen bases
  • Adenine always pairs with ____________ and Guanine always pairs with ____________
  • Adenine A
  • Thymine T
  • Guanine G
  • Cytosine C
  • The ___________ _____ is the order of the nitrogen bases and the set of instructions for making a person.
  • This is known as the HUMAN _____________________
The bases on one side of the DNA ladder match up in a specific way with the bases on the other side. Adenine (A) - Thymine (T),

Guanine (G) -Cytosine (C)

This pairing pattern is the key to understanding how DNA ____________________ occurs.




Try your own:


dna replication

DNA Replication

A cell makes a copy of its DNA during ___________ before mitosis occurs.

DNA replication ensures that each ___________ cell will have all of the _______________ information it needs to carry out its activities.

During DNA replication, special _______________ move up along the DNA ladder, _________ the molecule as it moves along.

A DNA molecule “unzips” between its paired ______. New bases pair with the base on each strand. As a result, two __________ DNA molecules form.

When the enzyme has passed the end of the DNA, two identical molecules of DNA are left behind. Each contains one side of the ________ DNA and one side made of "new" ________________.

Units which, when linked to sugar, make up one side of the DNA ______

New nucleotides move in and go to each side of the ________ ladder. The bases on these _________________ are very particular about what they connect to.