ppp

Question 1

ppp se deroule

Answer 1

cytosol des glandes mammaires , des tissus adipeux , foie , rein

Question 2

ppp est

Answer 2

ubiquiste et voie anabolique

Question 3

substrat de ppp

Answer 3

glucose 6p

Question 4

ppp represente

Answer 4

8 reactions : 2 phases

Question 5

phases de ppp

Answer 5

1) oxydative et irreversible ( reaction 1 2 3 )
2) non oxydative et reversible ( 3a , 3b , 4 , 5, 6 )

Question 6

PHASE 1 produit

Answer 6

2NADPH ,H+ , ribulose P

Question 7

PHASE 2 produit

Answer 7

ribose 5P

Question 8

role du NADPH

Answer 8

synthese des acides gras , cholesterol , hormone streoides

Question 9

role du ribose 5P

Answer 9

synthese du nucleotides , coenzyme (NADH,H+ , FADH , COA )

Question 10

reaction 1

Answer 10

GLUCOSE -P➔ 6phosphogluconolactone

Question 11

reaction 1 est

Answer 11

irreversible

Question 12

enzyme de la 1e

Answer 12

glycose6P deshydrogenase

Question 13

coenzyme de la 1e

Answer 13

NADP+

Question 14

2e reaction

Answer 14

6 phosphogluconolactone+H2O ➔ 6 phosphogluconate + H+

Question 15

2e reaction est

Answer 15

reversible

Question 16

enzyme de la 2e

Answer 16

lactonase

Question 17

reaction 3

Answer 17

6 phosphogluconate ➔ ribulose 5p +CO2

Question 18

reaction 3 est

Answer 18

irreversible

Question 19

enzyme de la 3e

Answer 19

6phosphogluconate deshydrogenase

Question 20

coenzyme de la 3e

Answer 20

NADP+

Question 21

reaction 3b

Answer 21

ribulose 5p➔ribose5P

Question 22

enzyme de la reaction 3b

Answer 22

isomerase

Question 23

reaction 3a

Answer 23

ribulose5P ➔xylulose 5P

Question 24

enzyme de la 3a

Answer 24

epimerase

Question 25

reaction 4

Answer 25

xylulose5p + RIBOSE 5p ➔glyceraldehyde 3P + sedoheptulose 7p

Question 26

enzyme de la reaction 4

Answer 26

trancetolase

Question 27

reaction 5

Answer 27

glyceraldehyde 3P + sedoheptulose 7p➔ erythrose 4phosphate + fructose 6p

Question 28

enzyme de la reaction 5

Answer 28

transaldolase:(-3C) cetose ➔ aldose

Question 29

reaction 6

Answer 29

erythrose 4phosphate + xylulose 5 phosphate ➔ glyceraldehyde + fructose 6phosphate

Question 30

enzyme reaction 6

Answer 30

transcetolase :(-2C) cetose➔aldose

Question 31

regulation de ppp

Answer 31

seule la partie oxydative est regulee

Question 32

enzyme cle de ppp

Answer 32

glucose 6P deshydrogenase

Question 33

inhibiteur de lenzyme cle

Answer 33

rapport NADPH/NADP+ élevé

Question 34

activateur de l enzyme cle

Answer 34

insulin

Question 35

bilan de ppp

Answer 35

ne consome pas et ne produit pas d ATP