Acizi nucelici Flashcards

1
Q

ce fel de componenta a nucleotidelor purtatoare de informatie genetica sunt acizii nucleici?

A

componenta prostetica

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

bazele azotat pirimidinice

A

citozina, timina, uracil

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

baze azotat purinice

A

adenina, guanina

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

structura primara a acizilor nucelici

A

baza azotat + monozaharida (pentoza) + rest de acid fosforic

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

tipuri de pentoze in ADN si ARN

A

beta - 2 dezoxi D ribofuranoza
B-D ribofuranoza

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

din ce sunt formate nucelozidele

A

pentoza + baza azotat

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

reactii formare nucleotide in cazul ARN cu baza azotat adenina

A

beta - D ribofuranoza + adenina -> adenozina + H3PO4 -> AMP

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

unde pe structura pentozei se insereaza baza azotat si acidul fosforic

A

baza azotat : pozitia 1 (OH glicozidic)
acid fosforic: pozitia 3 sau 5

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

unde sunt timina si uracilul in acizii nucelici?

A

timina - ADN
uracil - ARN

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

model macromolec ADN + baze complementare

A

2 catene rasucite, ele in sine sub forma de elice alfa, impreuna in forma de spirala, fiecare are 10 nucelotide

baza orientata in interior, radicalul fosfat in exterior => leg H intre baze

A = T, C =_ G

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

model macromolec ARN + baze complementare

A

model de bucle si tije

A = U, C =_ G

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

structura baze azotate

A

compusi heterociclici cu caracter pronuntat bazic determinat de cicluri ce contin atomi de azot

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

structura baze pirimidinice

A

un singur ciclu cu 2 atomi de azot

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

structura baza purinica

A

2 cicluri condensate, fiecare cu 2 atomi de azot, unul de 5 atomi, celalalt de 6

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

enzima care catalizeaza fosforilarea nucleozidelor si pozitia in care intra restul de acid fosforic

A

kinaze

5

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

care este forma activa a nucelotidelor

A

trifosfate

16
Q

cum se face legarea a doua nucelotide

A

pozitia 5 din prima si pozitia 3 din urmatoarea, se scindeaza 2 grupari fosfat si se face legatura esterica dubla

17
Q

rolul polimerazelor

A

leaga nucelotidele 5-3
leaga bazele azotate de pe cele 2 catene