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What is DNA?
What is DNA?
What is the role of chromosomes when it comes to molecular genetics and replication?
What is the role of chromosomes when it comes to molecular genetics and replication?
DNA Structure
DNA Structure
Deoxyribonucleic acid
Deoxyribonucleic acid
DNA is made of nucleotides (deoxyribose sugar, a phosphate, and four nitrogenous bases)
DNA is made of nucleotides (deoxyribose sugar, a phosphate, and four nitrogenous bases)
The image to the right shows the double helical structure of DNA. Each nucleotide is composed of a deoxyribose sugar, a phosphate, and one of the four nitrogenous bases.
The image to the right shows the double helical structure of DNA. Each nucleotide is composed of a deoxyribose sugar, a phosphate, and one of the four nitrogenous bases.
Complementary base paring:
Complementary base paring:
Adenine pairs with thymine
Adenine pairs with thymine
Guanine pairs with cytosine
Guanine pairs with cytosine
DNA consists of two anti-parallel strands of nucleotides (parallel but running in the opposite direction; 5' end of one strand of DNA aligns with the 3' end of the other strand)
DNA consists of two anti-parallel strands of nucleotides (parallel but running in the opposite direction; 5' end of one strand of DNA aligns with the 3' end of the other strand)
Build your own DNA structure!
Build your own DNA structure!
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