Question

25. Choose the event that does not occur inphotosynthesis
(a) Absorption of light energy bychlorophyll
(b) Reduction of carbon dioxide tocarbohydrates
(c) Oxidation of carbon to carbondioxide
(d) Conversion of light energy to chemicalenergy
26. The opening and closing of the stomatal pore dependsupon
(a) oxygen
(b) temperature
(c) water in guardcells
(d) concentration of CO2 instomata
27. Choose the forms in which most plants absorbnitrogen
(i) Proteins
(ii) Nitrates andNitrites
(iii) Urea
(iv) Atmosphericnitrogen
(a) (i) and (ii) (b) (ii) and (iii)
(c) iii) and (iv) (d) (i) and (iv)
28. Which is the first enzyme to mix with food in the digestivetract?
(b) Cellulase
(a) Pepsin
(d) Trypsin
(c) Amylase
29. Which of the following statement(s) is '(are)correct?
(i) Pyruvate can be converted into ethanol and carbon dioxide byyea
(ii) Fermentation takes place in aerobicbacteria
(iii) Fermentation takes
place in mitochondria (iv)
Fermentation is a form of
anaerobicrespiration
(a) (i) and (iii) (b) (ii) and(iv)
(c) (i) and (iv) (d) (ii) and(iii)

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Answer 1

25-(d)

26-(c)

27-(b)

28-(b)

29-(d)

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