DNA Structure
DNA is the molecule that holds the instructions for growth and
development in every living thing.
Where in an animal cell would you find DNA?
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The structure of DNA is described as a double-stranded helix held
together by complementary base pairs.
one strand
other strand
The basic units of DNA are nucleotides.
Nucleotides are the units or molecules of which DNA is composed.
These nucleotides consist of a deoxyribose sugar, phosphate and base.
Q) The deoxyribose sugar pictured here is sometimes called a ‘pentose’
sugar. Why do you think this might be?
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