Unit 11 Genetics and Genetic Engineering. DNA
DNA is the molecule that holds the guidance for growth and development in every living
thing. Its structure is described as a double-stranded helix held together by integral base pairs.
It contains complementary base pairs in which adenine is always ...
Nana Agyei Unit 11A Task 1 and 2 Ms. Kubasiak
Genetics and Genetic Engineering
Unit 11- Genetics and Genetic Engineering
Nucleic acids
DNA
DNA is the molecule that holds the guidance for growth and development in every living
thing. Its structure is described as a double-stranded helix held together by integral base pairs.
It contains complementary base pairs in which adenine is always linked by 2 hydrogen bonds
to Thymine (A-T). It also contains complementary pairs in which Guanine is always linked
by 3 hydrogen bonds to Cytosine (C-G).
Complementary base pairs
, Nana Agyei Unit 11A Task 1 and 2 Ms. Kubasiak
Genetics and Genetic Engineering
The basic units of DNA are nucleotides. These
nucleotides consist of a deoxyribose sugar, phosphate and base.
The nucleotides are identical except for the base, which can be an adenine, thymine, guanine
or cytosine. DNA is similar to RNA where it consists of adenine, cytosine, guanine and uracil
rather than thymine because DNA is believed to have been evolved from RNA due to it being
the first to exist.
The bases in DNA fall into two classes, purines and pyrimidine. The Purines are adenine and
guanine, and the pyrimidine is cytosine and Thymine.
The Process of DNA Replication
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