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bio chpt 13

QuestionAnswer
2 strands of nucleotides twisted in a spiral double helix
building block of nucleic acids nucleotide
copying dna for cell division replication
nitrogen base made of 2 carbon rings purine
nitrogen base made of 1 carbon ring pyrimidine
weak bond that joins nitrogen bases in double helix hydrogen bonds
3 main parts of all nucleotides phosphate, deoxyribose, nitrogen base
4 nitrogen bases that can be found in DNA nucleotides adenine, guanine, cytosine, thymine
what nitrogen bases are purines guanine adenine
what nitrogen bases are pyrimidines cytosine thymine
chargaff's base pairing rules adenine-thymine/cytosine-guanine
what holds the deoxyribose of one nucleotide to the phosphate of another nucleotide covalent bond-strong
what holds the nitrogen bases together in 2 strands hydrogen bonds-weak
what are the 3 functions of DNA store, copy, transmit info
what does it mean to describe DNA's strands as anti-parallel, how do we label it run in opposite directions, 5' and 3'
what does it mean to describe DNA's strands as complementary have a partner, a-t and c-g
what does it mean to describe DNA's replication as semi-conservative daughter strands are half og and half new
what year did watson and crick publish their results 1953
y didn't rosalind franklin share the nobel prize with them she died
what did rosalind franklin discover the shape of the dna-double helix
what are the 3 steps in extracting DNA from the living cells Detergent eNzymes Alcohol
what are the 3 basic steps in replication 1. helicase unzips DNA 2. use nucleotide strands as pattern to add new nucleotide by DNA polymerase 3. 2 nucleotides strands join by hydrogen bonds
4 enzymes involved in replication primase- primer ligase- joins okazaki fragments polymerase - adds new nucleotides helicase- unzips DNA
why is eukaryotic replication more complicated than prokaryotic replication bc it has a nucleus and more DNA
Created by: sf321
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