The Link Is A Long Discussion Of Dna

a: Double helix ~
b: twisted rope ladder

What: "The shape of a double helix is like a twisted rope ladder. The two strands of DNA are connected by alternating sugar and phosphate units. Attached to the sugar units on one side is either a purine or a pyrimidine. The same is true for the opposing side."

Useful?
Writer: Londonlady
LCC:
Where:
Date: May 6 2013 10:57 AM


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