- Which of the following is toxic even in smaller
concentration?
(a) Pb, Ni and Al (b) Cu, B and Pb
(c) Mn, Mo and Pb (d) Ni, B and Zn - Which of the following statements is incorrect, regarding
action spectrum?
(a) Action spectrum shows the use of light energy of
different wavelengths in photosynthesis.
(b) It is graphic representation of amount of light of
different wavelengths absorbed by a pigment.
(c) It is studied in relation to either O 2 evolved or CO 2
absorbed.
(d) It requires study of light utilisation at various
wavelengths. - Which of the following instrument is used to measure
relative humidity and transpiration?
(a) Psychrometer (b) Tensiometer
(c) Atmometer (d) None of these - Which one of the following is inoculated to rice field for
nitrogen fixation?
(a) Rhizobium (b) Azolla
(c) Lyngbia (d) Calothrix - Refer the given figure representing C 4 pathway in plants.
Select the incorrect statement regarding steps A, B and C.
(a) Step A represents fixation in which primary CO 2
acceptor Phosphoenol Pyruvate, present in mesophyll
cell combines with CO 2.
(b) In given step A RuBisCO enzyme is responsible for CO 2
fixation.
(c) Step B represents decarboxylation in which CO 2 is
released in the bundle sheath cells.
(d) Step C represents regeneration in which pyruvate and
PEP formed in bundle sheath cells are sent back to
mesophyll cells.- Study the given figure of nitrogen cycle and select the
correct option of labelled parts A, B, C and D.
A B C D
(a) Ammonification Animal Denitrification Plant
biomass biomass
(b) Denitrification Plant Ammonification Animal
biomass biomass
(c) Denitrification Plant Animal Ammoni-
biomass biomass fication
(d) Denitrification Ammo- Plant Animal
nification biomass biomass- Match the elements in column I to their respective functions
in column II.
Column I Column II
A. Calcium p. Photolytic evolution of O 2
B. Zinc q. Pollen germination
C. Molybdenum r. Evolution of CO 2
D. Boron s. Oxidation-reduction
reaction
E. Manganese t. Organisation of mitotic
spindle
(a) A-t, B-r, C-s, D-q, E-p (b) A-q, B-s, C-r, D-t, E-p
(c) A-t, B-r, C-q, D-s, E-p (d) A-q, B-r, C-s, D-p, E-t
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