As compound to a C_3-plant, how many additional molecules of ATP are needed for net production of one molecule of hexose sugar by C_4-plants?
 a) 2        b) 6        c) 0        d) 12

Proton gradient is broken down due to
a) Movement of electrons across the membrane to stroma
b) Movement of electrons across the membrane to lumen
c) Movement of proton across the membrane to lumen
d) Movement of proton across the membrane to stroma

The membrane of thylakoid is called
 a) Cell membrane        b) Fret membrane
 c) Granum membrane        d) Thylakoid membrane

The enzyme responsible for primary carboxylation in C_3-plants is
a) Hexokinase                        b) Succinic dehydrogenase
c) Pyruvate carboxylase        d) RuBP carboxylase oxygenase

Hill reaction occurs in
a) High altitude plants            b) Total darkness
c) Absence of water               d) Presence of ferricyanide

During the experiment in laboratory, the thylakoid is some how punctured so that the interior of the thylakoid is no longer separated from stroma. This damage will have the direction effect on
a) ATP formation                                                  b) Absorption of light
c) Flow of electrons from PS-I to PS-II                d) All of the above

Photosynthesis convert radient or solar energy into the
a) Physical energy    b) Latent energy    c) Chemical energy    d) Oxidation energy

Number of carboxylation occurs in Calvin cycle is
 a) Zero         b) One             c) Two             d) Three

In a CAM-plant, the concentration of organic acid
a) Increases during the day              b) Decreases or increases during the day
c) Increases during night                  d) Decreases during any time

Identify the correct sequence of enzymes given below which participate in the regeneration phase of Calvin cycle.
I.   Ribulose-5-phosphate isomerase
II.  Ribulose-5-phosphate epimerase
III. Transketolase
IV.  Triose phosphate isomerase
a) VI, I, III, II           b) III, IV, II, I            c) IV, III, I, II          d) II, I, IV, III

Etiolation in plants is caused when they
a) Are grown in dark                           b) Have mineral deficiency
c) Are grown in intense light               d) Are grown in blue light

Dichlorophenyl dimethylurea inhibits
 a) PS-I                                      b) PS-II
 c) Chloroplast functioning        d) Oxidative phosphorylation

Photosynthetic pigments in chloroplast are embedded in the membrane of
a) Photoglobin      b) Matrix    c) Thylakoid     d) Mitochondria

Rate of photosynthesis is low in herbs, shurbs as compared to sun plants because
 a) Herb, shrubs receive mere red light
 b) Herb, shrubs receive mere blue light
 c) Herb, shrubs receive mere more green light
 d) Herb, shrubs receive more white light

PEPcase has an advantage over RuBisCo. The advantage is
 a) RuBisCo combines with O_2 but PEPcase do not
 b) RuBisCo combines with NO_2 but PEPcase do not
 c) RuBisCo conserve energy but PEPcase do not
 d) PEPcase is present in both mesophyll cells and bundle sheath cells but RuBisCo is not

Which of the following is maximum in chloroplast?
 a) RuBP carboxylase        b) Hexokinase        c) Phosphatase        d) Nuclease

Which of the following characteristics out of I, II, III, IV are exhibited by C_4-plant?
I. Kranz anatomy
II. Oxaloacetic acid
III. Large bundle sheath cells
IV. Found only in desert area
a) I, II and III    b) I, II and IV         c)    II, III and IV         d)    III, I and IV

Plants adapted to low light intensity have
 a) Larger photosynthetic unit size than the sun plants
 b) Higher rate of carbon dioxide fixation than the sun plants
 c) More extended root system
 d) Leaves modified to spines

I. In photosynthesis, the proton accumulation is towards the inside of membrane of thylakoid
II. In respiration, proton accumulation occurs in the inter membrane space of the mitochondria
Select the correct option
a) Statement I is incorrect II is correct
b) Statement II is incorrect I is correct
c) Both Statement I and Statement II incorrect
d) Both Statement I and Statement II are correct

We are created by chloroplast. This statement suggest the idea
a) All the life form possesses chloroplast
b) All the life form depend on photosynthesis
c) All the life form is plant
d) Plants are the first organism on earth

Which of the following characteristics out of A, B and C are exhibited by C_4-plants?
 A - Kranz anatomy
 B - The product of photosynthesis is oxaloacetic acid
 C - Both PEP carboxylase and ribulose-bisphosphate carboxylase act as carboxylating enzymes.
 a) Only A and B, but not C    b) Only B and C, but not A
 c) Only A and C, but not B    d) All A, B and C

Hexose monophosphate pathway takes place in
 a) Endoplasmic reticulum    b) Cristae
 c) Cytoplasm                        d) Mitochondrial matrix

Function/s of accessory pigments is/are
I.   They enable wider range of wavelength of incoming light for photosynthesis
II.  They absorb light and transfer the energy to chlorophyll-a
III. They protect reaction centre from photo-oxidation
Select the correct option
 a) I and II     b) II and III         c)    Only I         d)    I, II and III

In CAM-plants, carbon dioxide required for photosynthesis enters the plant body during
a) Day time through the lenticels
b) Night through the stomata, which are kept open
c) Day time when the stomata are open
d) Night when the hydathodes are open 

Water is
a) Produced in dark reaction    b) A reactant in light reaction
c) Both (a) and (b)        d) Involve nowhere in photosynthesis

I. $H_{2}S$ and $H_{2}O$ and  is involved in photosynthesis of sulphur bacteria
II. ATP is produced during light reaction via chemiosmosis
III. Absence of light leads to the stoppage of photosynthesis
IV. Calvin cycle occurs in grana
Select the correct option
a) II, III and IV    b) I, III and IV    c) I, II and IV        d) I, II and III

Which of the following is the first compound that accepts carbon dioxide during dark phase of photosynthesis?
a) NADP        b) RuBP        c) Ferredoxin     d) Cytochrome