Q1.
One scientist cultured Cladophora in a suspension of Azotobacter and illuminated the culture by splitting light through a prism. He observed that bacteria accumulated mainly in the region of
Q2.
Oxygen is not produced during photosynthesis by
Q3.
Anoxygenic photosynthesis is characteristic of
Q4.
Oxygenic photosynthesis occurs in
Q5.
Stroma in the chloroplasts of higher plant contains
Q6.
Emerson's enhancement effect and Red drop have been instrumental in the discovery of
Q7.
Chromatophores take part in
Q8.
Which fractions of the visible spectrum of solar radiations are primarily absorbed by carotenoids of the higher plants?
Q9.
Which element is located at the centre of the porphyrin ring in chlorophyll?
Q10.
Chlorophyll a molecule at its carbon atom 3 of the pyrrole ring II has one of the following
Q11.
The core metal of chlorophyll is
Q12.
Chlorophyll a occurs in
Q13.
Photosynthetic pigments found in the chloroplasts occur in
Q14.
The size of chlorophyll molecule is
Q15.
Which of the following is not a product of light reaction of photosynthesis?
Q16.
Which of the following absorb light energy for photosynthesis?
Q17.
The first step for initiation of photosynthesis will be
Q18.
NADPH2 is generated through
Q19.
Which of the following pigments acts as a reaction-centre during photosynthesis?
Q20.
Ferredoxin is a constituent of
Q21.
In light reaction, plastoquinone facilitates the transfer of electrons from
Q22.
In a chloroplast the highest number of protons are found in
Q23.
Read the following four statements (A – D). How many of the above statements are right?
Q24.
Which one of the following is essential for photolysis of water?
Q25.
Read the following four statements, (i), (ii), (iii) and (iv) and select the right option having both correct statements.
Statements :
(i) Z scheme of light reaction takes place in presence of PSI only.
(ii) Only PSI is functional in cyclic photophosphorylation.
(iii) Cyclic photophosphorylation results into synthesis of ATP and NADPH2.
(iv) Stroma lamellae lack PSII as well as NADP.
Q26.
Cyclic photophosphorylation results in the formation of
Q27.
Electrons from excited chlorophyll molecule of photosystem II are accepted first by
Q28.
The first acceptor of electrons from an excited chlorophyll molecule of photosystem II is
Q29.
In photosystem I, the first electron acceptor is
Q30.
Which one of the following concerns photophosphorylation?
Q31.
In photosynthesis energy from light reaction to dark reaction is transferred in the form of
Q32.
Which pigment system is inactivated in red drop?
Q33.
During light reaction of photosynthesis, which of the following phenomenon is observed during cyclic phosphorylation as well as non-cyclic phosphorylation?
Q34.
A photosynthesising plant is releasing 18O more than the normal. The plant must have been supplied with
Q35.
Photosystem II occurs in
Q36.
NADP+ is reduced to NADPH in
Q37.
In photosynthesis, the light-independent reactions take place at
Q38.
Which one of the following organisms is correctly matched with its three characteristics?
Q39.
PGA as the first CO2 fixation product was discovered in photosynthesis of
Q40.
The chemiosmotic coupling hypothesis of oxidative phosphorylation proposes that adenosine triphosphate (ATP) is formed because
Q41.
Chemiosmotic theory of ATP synthesis in the chloroplasts and mitochondria is based on
Q42.
In C3 plants, the first stable product of photosynthesis during the dark reaction is
Q43.
For assimilation of one CO2 molecule, the energy required in form of ATP and NADPH2 are
Q44.
For the synthesis of one glucose molecule the Calvin cycle operates for
Q45.
Carbon dioxide acceptor in C3-plants is
Q46.
The mechanism of ATP formation both in chloroplast and mitochondria is explained by
Q47.
What will be the number of Calvin cycles to generate one molecule of hexose?
Q48.
The primary acceptor, during CO2 fixation in C3 plants, is
Q49.
The carbon dioxide acceptor in Calvin cycle/C3-plants is
Q50.
Which technique has helped in investigation of Calvin cycle?
Q51.
Dark reactions of photosynthesis occur in
Q52.
Carbon dioxide joins the photosynthetic pathway in
Q53.
Phosphoenol pyruvate (PEP) is the primary CO2 acceptor in
Q54.
A plant in your garden avoids photorespiratory losses, has improved water use efficiency, shows high rates of photosynthesis at high temperatures and has improved efficiency of nitrogen utilisation. In which of the following physiological groups would you assign this plant?
Q55.
Bundle sheath cells
Karnataka NEET 2013
medium
Q56.
CAM helps the plants in
Q57.
In kranz anatomy, the bundle sheath cells have
Q58.
Study the pathway given below. In which of the following options correct words for all the three blanks A, B and C are indicated?
Q59.
Kranz anatomy is one of the characteristics of the leaves of
Q60.
The C4 plants are photosynthetically more efficient than C3 plants because
Q61.
In leaves of C4 plants, malic acid synthesis during CO2 fixation occurs in
Q62.
In the leaves of C4 plants, malic acid formation during CO2 fixation occurs in the cells of
Q63.
As compared to a C3-plant, how many additional molecules of ATP are needed for net production of one molecule of hexose sugar by C4-plants?
Q64.
Photosynthesis in C4 plants is relatively less limited by atmospheric CO2 levels because
Q65.
In sugarcane plant 14CO2 is fixed to malic acid, in which the enzyme that fixes CO2 is
Q66.
Stomata of CAM plants
Q67.
Which pair is wrong?
Q68.
Which is the first CO2 acceptor enzyme in C4 plants?
Q69.
In C4 plants, CO2 combines with
Q70.
In C4 plants, CO2 fixation is done by
Q71.
The CO2 fixation during C4 pathway occurs in the chloroplast of
Q72.
Which one is a C4-plant?
Q73.
The enzyme that catalyses carbon dioxide fixation in C4 plants is
Q74.
The first carbon dioxide acceptor in C4-plants is
Q75.
Kranz anatomy is typical of
Q76.
In C4 plants, Calvin cycle operates in
Q77.
The oxygenation activity of RuBisCO enzyme in photorespiration leads to the formation of
Q78.
The process which makes major difference between C3 and C4 plants is
Q79.
A process that makes important difference between C3 and C4 plants is
Q80.
The correct sequence of cell organelles during photorespiration is
Q81.
C4 plants are more efficient in photosynthesis than C3 plants due to
Q82.
During photorespiration, the oxygen consuming reaction(s) occur in
Q83.
Which one of the following is wrong in relation to photorespiration?
Q84.
Photorespiration is favoured by
Q85.
The substrate for photorespiration is
Q86.
With reference to factors affecting the rate of photosynthesis, which of the following statements is not correct?
Q87.
Plants adapted to low light intensity have
Q88.
The rate of photosynthesis is higher in
Q89.
The law of limiting factors was proposed by
Q90.
At a temperature above 35ºC
Q91.
During monsoon, the rice crop of eastern states of India shows lesser yield due to limiting factor of