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Flashcards in bio dna quiz Deck (27):
1

nucleotide I

phosphate group
pentose sugar (5C)
nitrogenous base

DNA runsantiparallel

2

pentose sugar

DNA: deoxyribose c5h10o4
RNA: ribose C5H10o5

3

pyrimidines

single ring nitrogenous base
cytosine
thymine

4

purines

double ring nitrogenous base
adenine
guanine

5

bonds

phosphodyester linkage: covalent bond btw phosphate group and sugar

6

DNA replication

hydrogen bond first then phosphodyester link
new nucleotides have 3 phospahte group
starts at origin of replication

7

Helicase

breaks hydrogen bond
unzips DNA

8

SSBP

holds strand apart

9

DNA polymerase

reads template strand and conduct complementary strand

10

DNA polymerase extended

cannot initiate building new strand.
primase: enzyme that builds begining (short) w/RNA then later is replaced
new strand 5-3
grabs phsphate n attach it to sugar

11

lagging strand

jumps forawrd then would build back word leaving fragments
ligase form covalent okazaki bond

12

protein synthesis

DNA-protein-traits
20 types of amino acid
peptide bond combine aa

13

amino acid level of structure

primary= link aa in spec order
secondary fold over
tertiary globular
quaternary 2 tertiary

14

gene

spec sequence of DNA nucleotides that code for spec protein

a spec order nucleotide to create a spec order of aa

3 nucleotide=1 aa

15

1 strand used for RNA

ghost strand is not use

16

space btw gene sequence

promoter sequence: before a gene

17

transcription

mRNA (copy of DNA) complement was made.
initiation: RNA polymerase reads DNA template: builds 5-3: premRNA

promoter-terminator
RNA polymerase starts in the middle of tatabox so no nucleotide is missing

18

processing
dicing/splicing

premRNA edited into shorter functional=mRNA
has exon: expressed
intron=is cut out but can b combined together to form another mRNA (alternative splicing)

19

translation

ribosome (rRNA)reads mRNA to compose aa together

20

RNA

AUCG

21

tRNA

tranfer
bring aa to ribosome in spec order that is coded from mRNA

22

grifith

injected encap virus=mouse dies

rough cell=live

heated smooth= live

heated s w/ rough= dead
(living s cell r found)

23

avery, mccarty and maccloed

determine DNA is hereditary
solution of aa, r/dna
and add enzymes to destroy one of them then a some R virus cells. S cells appear when DNA is present

24

hersey and chase

phage grown in sulfure (protein) so only liquid is radioactive

pahge grown in phosphorus (DNA) and radioactive in pellet bc phos enters cell

25

chargaff

A=T (same amt.)
C=G (same amt)

26

rosalinid

x ray crystalography

27

watson and crick

double helix