BIOLOGY GENETICS COMPLETE STUDY GUIDE 2024 MIDTERM (Complete And Verified Study material) (16pages) LEARNEXAMS
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DNA Structure:
● DNA is double stranded - which makes it 50x as strong as a single strand
● DNA is made up of building blocks called nucleotides - have one deoxyribose sugar, one
phosphate group, and one nitrogenous base
○ Nitrogenous bases = the information carrying part of DNA
■ A and G = purines b/c they have two ring structure
■ C and G = pyrimidines b/c they have single ring structure
■ Because purines always pair with pyrmidines, the double helix has the
same width throughout
■ A and T are bonded by two hydrogen bonds, G and C are bonded by three
is provided by hydrogen bonding); hydrogen,
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