RUBISCO activity

[hassam]

"er says that it is wrong to say that there will be comppletely no fixation of co2 at lower conc . of co2 bt i learnt that at lower conc....rubisco's carboxylase activity finishes and instead oxygenase activity occurs so CO2 must not be fixed then......cn any one clear this contradiction with ER

 

[hassam]

this taken form ms of question abt role of stoamta in relation to photsythesis....wat the helll is EDGE effect???

 

[hassam]

With reference to Fig. 4.1, list two visible features of the cell B that allows the pore to
open and close?

ref. to chloroplasts ;
sausage shaped / AW ;
joined only at ends ;
unevenly thickened walls / thick above and below / thin furthest from the pore ;
ref. vacuole ;
the MS is horrible.....i mean wat da hell has chloroplast and vacuole to do with opening and closing of pore.....aaand i dnt understand how being sausage shaped will allow too open easily.....

 

[mrpaudel]

For the 2nd one..idk bout the vacuoles and chloroplasts....but sausage shaped helps..!! it relaxes and contracts to close and open...look at the page 217 in the CIE endorsed bio book...!!