22 Taxol is an anticancer drug extracted from the Pacific ye

22) Taxol is an anticancer drug extracted from the Pacific yew animal t the microtubule ormation by binding to microtubules and accelerating their assembly from protein precursor, tubulin. Surprisingly, this stops mitosis. Specifically, taxol must affect A) chromatid assembly. B) the fibers of the mitotic spindle. C) anaphase. D) the S phase of the cell cycle. E) formation of the centrioles.

Solution

22 B the fibres of mitotic spindle ... because the fibres are made of microtubules on which taxol acts

19) c ATP, CO2 AND ETHANOL .... yeast perfomes alcohlic fermentation ultimately producing ATP and ethyl alcohol ...beacuse yeast has got the enzyme alcohol dehydrogenase .

20) D) disapperance of nucleolus ... fact based question has no explination ..

21) D) it requires 6 rounds of calvin cycle to fix one glucose molecule .... because glucose molecule is composed of 6 carbon atoms ..... (we know For every three molecules of CO2 which go into the Calvin cycle, 1 molecule of the three carbon compund glyceraldehyde 3-phosphate (G3P) is formed. since 2 molecules of G3P are combined to obtain 1 molecule of glucose. Thus , the Calvin cycle needs to make a total of 6 ROUNDS to FORM two molecules of G3P OR ONE MOLECULE OF 6C GLUCOSE ....