Flashcards in 3.3 DNA Structure Deck (13):
What are nucleic acids made of?
What are the 3 nucleotides?
pentose sugar, phosphate, nitrogen base
What are the pentose sugar in DNA?
ribose or deoxyribose
What are the nitrogenous bases?
adenine, thymine, cytosine, guanine
What are the purines?
What are the pyrimidines?
cytosine, thymine, and uracil
What are purines?
two carbon nitrogen ring bases
What are pyrimidines?
one carbon nitrogen ring bases
Which nitrogenous bases bond?
adenine and thymine, guanine and cytosine
What and how many bonds between adenine and thymine?
2 hydrogen bonds
What and how many bonds between guanine and cytosine?
3 hydrogen bonds
What is the structure of DNA?
double helix with backbone composed of alternating sugars and phosphates, anti-parallel