NCERT CLASS 11 | TOPIC : PLANT PHYSIOLOGY-PHOTOSYNTHESIS | QB-2 | NEET BIOLOGY ONLINE TEST

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NCERT CLASS 11 | TOPIC : PLANT PHYSIOLOGY-PHOTOSYNTHESIS | QB-2 | NEET BIOLOGY ONLINE TEST

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It contains 86 important questions. Choose the most correct answer. Then check your answer. Try again if there are errors. Regards : www.onlinetest.kalvisolai.com

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1 ➤ 101. The enzymes of dark reaction in C4 plants are found in

(a) Bundle sheath chloroplast (b) Mesophyll chloroplast (c) Both (a) and (b) (d) None of these

2 ➤ 102. In C4 plants, the mesophyll cells are connected with bundle sheath cells with the help of

(a) Cytoplasmic connection (b) Special connecting tissues (c) Plasmodesmata (d) Connection is not essential

3 ➤ 103. In case of C4 pathway, CO2 combines with

(a) PGA (b) PEP (c) RuDP (d) RMP

4 ➤ 104. Which one is a C4 plant?

(a) Papaya (b) Pea (c) Potato (d) Maize

5 ➤ 105. C4 plants are also known as

(a) Hatch and Slack type (b) Calvin type (c) Calvin and Bassham type (d) Emerson type

6 ➤ 106. In C4 plants, Calvin cycle occurs in

(a) Stroma of bundle sheath chloroplast (b) Mesophyll chloroplast (c) Grana of bundle sheath chloroplast. (d) Does not occur as CO2 is fixed mainly by PEP and no CO2 is left for the Calvin cycle.

7 ➤ 107. Tropical plant like sugarcane show high efficiency of CO2 fixation because of

(a) Calvin cycle (b) Hatch and Slack cycle (c) EMP pathway (d) TCA cycle

8 ➤ 108. Which of the following cycle shows oxaloacetic acid as the first stable product?

(a) Calvin cycle (b) Hatch and Slack cycle (c) C2 cycle (d) None of these

9 ➤ 109. Kranz type of anatomy is found in

(a) C2 plants (b) C3 plants (c) C4 plants (d) CAM plants

10 ➤ 110. C4 plants are adapted to

(a) Hot and dry climate (b) Temperate climate (c) Cold and dry climate (d) Hot and humid climate

11 ➤ 111. Which one of the following is wrong in relation to photorespiration?

(a) It is a characteristic of C3 plants (b) It occurs in chloroplasts (c) It occurs in day time only (d) It is a characteristic of C4 plants

12 ➤ 112. How many types of photosynthetic cells occur in C4 plant?

(a) One type (b) Two types (c) Four types (d) Eight types

13 ➤ 113. Which of the following cells of C4 plants are prominently loaded with starch?

(a) Epidermal cells (b) Mesophyll cells (c) Bundle sheath cells (d) All of these

14 ➤ 114. The number of carboxylation in C4 cycle is/are

(a) 1 (b) 2 (c) 5 (d) 3

15 ➤ 115. Photorespiration takes place in

(a) Chloroplast, mitochondria (b) Mitochondria, peroxisome (c) Chloroplasts, peroxisome, mitochondria (d) Chloroplasts, cytoplasm, mitochondria

16 ➤ 116. Photorespiration is called

(a) C2 cycle (b) C3 cycle (c) C4 cycle (d) None of these

17 ➤ 117. The first reaction in photorespiraton is

(a) Carboxylation (b) Decarboxylation (c) Oxygenation (d) Phosphorylation

18 ➤ 118. C4 plant is characterized by

(a) High tolerance to temperature (b) Lacks process of photorespiration (c) Greater productivity of biomass (d) All of these

19 ➤ 119. Bundle sheath cells have these following characters except

(a) Large in size (b) Large number of chloroplast (c) Thick wall impervious to gaseous exchange (d) With intercellular spaces

20 ➤ 120. Primary CO2 acceptor in C4 plant occurs in

(a) Inner layer cells of bundle sheath (b) Outer layer cells of bundle sheath (c) Mesophyll cells (d) None of these

21 ➤ 121. Bundle sheath cells are rich in

(a) RuBisCO (b) PEP case (c) Both (a) and (b) (d) None of these

22 ➤ 122. Which of the following is correct about photorespiration?

(a) Wasteful process (b) ATP is utilized (c) Release of CO2 (d) All of these

23 ➤ 123. During photorespiration

(a) RuBisCo binds with O2 (b) Phosphoglycerate and phosphoglycolate is formed (c) Sugar is not synthesized (d) All the above

24 ➤ 124. Photorespiration does not takes place in C4 plant because

(a) O2 is not released in C4 plant during photosynthesis. (b) Intracellular concentration of CO2 is high in bundle sheath and it ensures RuBisCo function as carboxylase. (c) They are found in cold environment. (d) Stomata in them opens during night.

25 ➤ 125. External factor affecting photosynthesis are

(a) Sunlight and temperature (b) CO2 concentration (c) Water (d) All of these

26 ➤ 126. Internal factor affecting photosynthesis are

(a) Number and size of leaf (b) Age of leaf and orientation (c) Internal CO2 concentration and amount of chlorophyll (d) All the above

27 ➤ 127. Internal factor of plant depends on

(a) Growth of plant (b) Genetic predisposition (c) Both (a) and (b) (d) None of these

28 ➤ 128. Which is a limiting factor?

(a) Green leaf (b) Optimal light (c) Optimal CO2 (d) Low temperature

29 ➤ 129. Photosynthesis is affected by

(a) Quality of light (b) Intensity of light (c) Duration of light (d) All of these

30 ➤ 130. Light saturation occurs at _______ of the fall sunlight.

(a) 2% (b) 5% (c) 10% (d) 20%

31 ➤ 131. Light may be a limiting factor for

(a) plants in dense forest (b) plant in temperate forest (c) plant in grassland (d) all

32 ➤ 132. What is the relationship between CO2 fixation and incident light at low intensities?

(a) Linear (b) Parabola (c) Hyperbola (d) None

33 ➤ 133. Select the incorrect statement from the following:

(a) At high intensities, both C3 and C4 plants shows increase in the rate of photosynthesis by increasing CO2 concentration. (b) C4 plants shows saturation at 360 μl/L. (c) C3 plant shows saturation beyond 450 μl/L. (d) Productivity of tomatoes and ball papers cannot be increased by enriching environment by CO2.

34 ➤ 134. Select the incorrect statement from the following:

(a) Dark reaction is more sensitive to temperature. (b) Light reaction is less sensitive to temperature. (c) C4 plant responds to higher temperature and C3 plant have lower optimum temperature. (d) Tropical plant have lower optimum temperature for photosynthesis.

35 ➤ 135. Water stress leads to

(a) Closing of stomata (b) Wilting of leaves (c) Reduced activity of leaf (d) All of these

36 ➤ 136. Which factor indirectly affects the process of photosynthesis?

(a) Light (b) Temperature (c) CO2 concentration (d) Water

37 ➤ 137. Photosynthesis takes place

(a) Only in sunlight (b) Only in yellow light (c) In the visible light obtained from any source (d) Only in very high intensity of light

38 ➤ 138. Photo-oxidation of chlorophyll is called

(a) Intensification (b) Chlorosis (c) Solarization (d) Defoliation

39 ➤ 139. Which one of the following is not a limiting factor for photosynthesis?

(a) Oxygen (b) Carbon dioxide (c) Chlorophyll (d) Light

40 ➤ 140. If a plant is kept in 300 ppm CO2 concentration, what will happen to it?

(a) The plant will die soon. (b) The plant will grow but will not die. (c) The plant will show normal photosynthesis. (d) Respiration will be greatly decreased.

41 ➤ 141. What will be the effect of intermittent light on photosynthesis?

(a) It will increase (b) It will decrease (c) Nothing will happen (d) Process will stop

42 ➤ 142. The diagram below shows three plants with identical leaf surface areas: Assuming all other conditions were identical for all three plants, which of the plants would likely to photosynthesize slowest and fastest.

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(a) Y slowest, Z fastest (b) Z slowest, X fastest (c) X slowest, Z fastest (d) Z slowest, Y fastest

43 ➤ 143. Main factor which limits the rate of photosynthesis on a clear day is

(a) chlorophyll (b) light (c) CO2 (d) water

44 ➤ 144. Blackman’s law of limiting factor is applied to

(a) growth (b) respiration (c) transpiration (d) photosynthesis

45 ➤ 145. Which factor is not limited to normal conditions for photosynthesis?

(a) Air (b) CO2 (c) Water (d) Chlorophyll

46 ➤ 146. The first product of CO2 fixation in Hatch and Slack (C4) cycle in plants is formation of

(a) oxaloacetate by carboxylation of phosphoenol pyruvate (PEP) in bundle sheath cells (b) phosphoglyceric acid in mesophyll cells (c) bundle sheath cells (d) oxaloacetate by carboxylation of phosphoenol pyruvate (PEP) in the mesophyll cells

47 ➤ 147. Assertion: C4 pathway of CO2 fixation is found in some tropical plants.

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Reason: In this pathway CO2 is fixed by 3C compound.

(a) If both the assertion and the reason are true and the reason is a correct explanation of the assertion. (b) If both the assertion and reason are true but the reason is not a correct explanation of the assertion. (c) If the assertion is true but the reason is false. (d) If both the assertion and reason are false.

48 ➤ 148. Assertion: Six molecules of CO2 and twelve molecules of NADPH+ + H+ and 18 ATP are used to form one hexose molecule.

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Reason: Light reaction results in the formation of ATP and NADPH2 and oxygen.

(a) If both the assertion and the reason are true and the reason is a correct explanation of the assertion. (b) If both the assertion and reason are true but the reason is not a correct explanation of the assertion. (c) If the assertion is true but the reason is false. (d) If both the assertion and reason are false.

49 ➤ 149. Assertion: The first CO2 fixation product was a C–organic compound.

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Reason: The use of radioactive C14 in algal photosynthesis studied led to this discovery.

(a) If both the assertion and the reason are true and the reason is a correct explanation of the assertion. (b) If both the assertion and reason are true but the reason is not a correct explanation of the assertion. (c) If the assertion is true but the reason is false. (d) If both the assertion and reason are false.

50 ➤ 150. Assertion: There is a decrease in photosynthesis, if the photosynthetic cells are illuminated by light of P680 nm or more wavelength.

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Reason: In red drop phenomenon the rate of photosynthesis decreases.

(a) If both the assertion and the reason are true and the reason is a correct explanation of the assertion. (b) If both the assertion and reason are true but the reason is not a correct explanation of the assertion. (c) If the assertion is true but the reason is false. (d) If both the assertion and reason are false.

51 ➤ 151. Assertion: CAM plants lack structural compartmentation of leaf, as found in C4 plants.

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Reason: Stomata of CAM plants are open during the night.

(a) If both the assertion and the reason are true and the reason is a correct explanation of the assertion. (b) If both the assertion and reason are true but the reason is not a correct explanation of the assertion. (c) If the assertion is true but the reason is false. (d) If both the assertion and reason are false.

52 ➤ 152. Assertion: Plants utilizing the first RuBP in CO2 fixations are called C3 plants.

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Reason: Plants utilizing the first PEP in CO2 fixations are called C2 plants.

(a) If both the assertion and the reason are true and the reason is a correct explanation of the assertion. (b) If both the assertion and reason are true but the reason is not a correct explanation of the assertion. (c) If the assertion is true but the reason is false. (d) If both the assertion and reason are false.

53 ➤ 153. Assertion: Cyclic pathway of photosynthesis first appeared in some eubacterial species.

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Reason: Oxygen started accumulating in the atmosphere after the non-cyclic pathway of photosynthesis evolved.

(a) If both the assertion and the reason are true and the reason is a correct explanation of the assertion. (b) If both the assertion and reason are true but the reason is not a correct explanation of the assertion. (c) If the assertion is true but the reason is false. (d) If both the assertion and reason are false.

54 ➤ 154. Assertion: The stromal thylakoids are rich in both PS I and PS II.

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Reason: The granal membranes are rich in ATP synthetase.

(a) If both the assertion and the reason are true and the reason is a correct explanation of the assertion. (b) If both the assertion and reason are true but the reason is not a correct explanation of the assertion. (c) If the assertion is true but the reason is false. (d) If both the assertion and reason are false.

55 ➤ 155. Assertion: Cyclic photophosphorylation synthesizes NADPH.

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Reason: NADPH synthesized in cyclic photophosphorylation is not associated with ATP formation.

(a) If both the assertion and the reason are true and the reason is a correct explanation of the assertion. (b) If both the assertion and reason are true but the reason is not a correct explanation of the assertion. (c) If the assertion is true but the reason is false. (d) If both the assertion and reason are false.

56 ➤ 156. Assertion: Oxidative phosphorylation requires oxygen.

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Reason: Oxidative photophosphorylation occurs in chloroplast.

(a) If both the assertion and the reason are true and the reason is a correct explanation of the assertion. (b) If both the assertion and reason are true but the reason is not a correct explanation of the assertion. (c) If the assertion is true but the reason is false. (d) If both the assertion and reason are false.

57 ➤ 157. Assertion: Each molecule of ribulose-1, 5-bisphosphate fixes one molecule of CO2.

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Reason: Three molecules of NADPH and two ATP are required for the fixation of one molecule of CO2.

(a) If both the assertion and the reason are true and the reason is a correct explanation of the assertion. (b) If both the assertion and reason are true but the reason is not a correct explanation of the assertion. (c) If the assertion is true but the reason is false. (d) If both the assertion and reason are false.

58 ➤ 158. Assertion: Regeneration of CO2 acceptor molecule RuBP is crucial if the cycle is to continue uninterrupted.

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Reason: The regeneration steps require one ATP for phosphorylation to form RuBP.

(a) If both the assertion and the reason are true and the reason is a correct explanation of the assertion. (b) If both the assertion and reason are true but the reason is not a correct explanation of the assertion. (c) If the assertion is true but the reason is false. (d) If both the assertion and reason are false.

59 ➤ 159. Assertion: C4 photosynthetic pathway is more efficient than the C3 pathway.

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Reason: Photorespiration is suppressed in C4 plants.

(a) If both the assertion and the reason are true and the reason is a correct explanation of the assertion. (b) If both the assertion and reason are true but the reason is not a correct explanation of the assertion. (c) If the assertion is true but the reason is false. (d) If both the assertion and reason are false.

60 ➤ 160. Assertion: Dark reaction is light independent reaction.

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Reason: Dark reaction doesn’t require product formed in light reaction.

(a) If both the assertion and the reason are true and the reason is a correct explanation of the assertion. (b) If both the assertion and reason are true but the reason is not a correct explanation of the assertion. (c) If the assertion is true but the reason is false. (d) If both the assertion and reason are false.

61 ➤ 161. Assertion: Accessory pigment helps to make photosynthesis more efficient.

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Reason: Accessory pigment helps to absorb different wavelengths of light.

(a) If both the assertion and the reason are true and the reason is a correct explanation of the assertion. (b) If both the assertion and reason are true but the reason is not a correct explanation of the assertion. (c) If the assertion is true but the reason is false. (d) If both the assertion and reason are false.

62 ➤ 162. Assertion: Photolysis of water occur on inner side of the membrane of thylakoid.

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Reason: Water splitting complex is associated with PSII which is physically located on inner side of thylakoid Membrane.

(a) If both the assertion and the reason are true and the reason is a correct explanation of the assertion. (b) If both the assertion and reason are true but the reason is not a correct explanation of the assertion. (c) If the assertion is true but the reason is false. (d) If both the assertion and reason are false.

63 ➤ 163. Assertion: Synthesis of ATP from ADP in chloroplast is called photophosphorylation.

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Reason: This phosphorylation in chloroplast occurs in presence of light.

(a) If both the assertion and the reason are true and the reason is a correct explanation of the assertion. (b) If both the assertion and reason are true but the reason is not a correct explanation of the assertion. (c) If the assertion is true but the reason is false. (d) If both the assertion and reason are false.

64 ➤ 164. Assertion: Proton produced by the splitting of water accumulate with in the lumen of thylakoid.

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Reason: Spitting of water molecule takes place on inner side of the membrane of thylakoid.

(a) If both the assertion and the reason are true and the reason is a correct explanation of the assertion. (b) If both the assertion and reason are true but the reason is not a correct explanation of the assertion. (c) If the assertion is true but the reason is false. (d) If both the assertion and reason are false.

65 ➤ 165. Assertion: Calvin cycle is referred as C3 pathway

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Reason: In Calvin cycle the first product of CO2 fixation is a C3 acid (PGA).

(a) If both the assertion and the reason are true and the reason is a correct explanation of the assertion. (b) If both the assertion and reason are true but the reason is not a correct explanation of the assertion. (c) If the assertion is true but the reason is false. (d) If both the assertion and reason are false.

66 ➤ 166. Assertion: To make one molecule of glucose 6 turns of the Calvin cycle required.

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Reason: One turn of Calvin cycle fix one molecule of CO2

(a) If both the assertion and the reason are true and the reason is a correct explanation of the assertion. (b) If both the assertion and reason are true but the reason is not a correct explanation of the assertion. (c) If the assertion is true but the reason is false. (d) If both the assertion and reason are false.

67 ➤ 167. Assertion: Photorespiration is a wasteful process.

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Reason: It results in CO2 release with the utilization of ATP and there is no synthesis of ATP or NADPH

(a) If both the assertion and the reason are true and the reason is a correct explanation of the assertion. (b) If both the assertion and reason are true but the reason is not a correct explanation of the assertion. (c) If the assertion is true but the reason is false. (d) If both the assertion and reason are false.

68 ➤ 168. Assertion: Light is rarely a limiting factor in most of plant.

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Reason: Light saturation occur at 10% of the full sunlight.

(a) If both the assertion and the reason are true and the reason is a correct explanation of the assertion. (b) If both the assertion and reason are true but the reason is not a correct explanation of the assertion. (c) If the assertion is true but the reason is false. (d) If both the assertion and reason are false.

69 ➤ 169. Assertion: Current availability of CO2 in atmosphere is limiting to C4 plant.

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Reason: C3 plants more efficiently fix CO2 than C4 plants.

(a) If both the assertion and the reason are true and the reason is a correct explanation of the assertion. (b) If both the assertion and reason are true but the reason is not a correct explanation of the assertion. (c) If the assertion is true but the reason is false. (d) If both the assertion and reason are false.

70 ➤ 170. Assertion: Dark reaction is controlled by temperature.

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Reason: Dark reaction is enzymatic reaction.

(a) If both the assertion and the reason are true and the reason is a correct explanation of the assertion. (b) If both the assertion and reason are true but the reason is not a correct explanation of the assertion. (c) If the assertion is true but the reason is false. (d) If both the assertion and reason are false.

71 ➤ 171. Assertion: Photosynthesis occurs only in green parts of plants.

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Reason: Green part of plant contains chlorophyll.

(a) If both the assertion and the reason are true and the reason is a correct explanation of the assertion. (b) If both the assertion and reason are true but the reason is not a correct explanation of the assertion. (c) If the assertion is true but the reason is false. (d) If both the assertion and reason are false.

72 ➤ 172. Assertion: Chemosynthetic pathway occur in stroma of chloroplast.

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Reason: Enzyme required for chemosynthetic pathway present in stroma.

(a) If both the assertion and the reason are true and the reason is a correct explanation of the assertion. (b) If both the assertion and reason are true but the reason is not a correct explanation of the assertion. (c) If the assertion is true but the reason is false. (d) If both the assertion and reason are false.

73 ➤ 1. Which metal ion is a constituent of chlorophyll?

(a) Iron (b) Copper (c) Magnesium (d) Zinc

74 ➤ 2. Which pigment acts directly to convert light energy into chemical energy?

(a) Chlorophyll a (b) Chlorophyll b (c) Xanthophyll (d) Carotenoid

75 ➤ 3. Which range of wavelength (in nm) is called Photosynthetically Active Radiation (PAR)?

(a) 100 to 390 (b) 390 to 430 (c) 400 to 700 (d) 760 to 10000

76 ➤ 4. Which light range is most effective in photosynthesis?

(a) Blue (b) Green (c) Red (d) Violet

77 ➤ 5. Chemosynthetic bacteria obtain energy from

(a) Sun (b) Infra-red rays (c) Organic substances (d) Inorganic chemicals

78 ➤ 6. Energy required for ATP synthesis in PSII comes from

(a) Proton gradient (b) Electron gradient (c) Reduction of glucose (d) Oxidation of glucose

79 ➤ 7. During light reaction in photosynthesis, which of the following are formed?

(a) ATP and sugar (b) Hydrogen, O2 and sugar (c) ATP, hydrogen donor and O2 (d) ATP, hydrogen and O2 donor

80 ➤ 8. Dark reaction in photosynthesis is so called because

(a) It can occur in dark also. (b) It does not depend on light energy. (c) It cannot occur during day light. (d) It occurs more rapidly at night.

81 ➤ 9. PEP is a primary CO2 acceptor in

(a) C4 plants (b) C3 plants (c) C2 plants (d) Both C3 and C4 plants

82 ➤ 10. Splitting of water is associated with

(a) Photosystem I (b) Lumen of thylakoid (c) Both photosystems I and II (d) Inner surface of thylakoid membrane

83 ➤ 11. The correct sequence of flow of electrons in the light reaction is

(a) PS II, plastoquinone, cytochromes, PS I ferredoxin (b) PS I, plasotquinone, cytochromes, PS II ferredoxin (c) PS I, ferredoxin, PS II (d) PS I, plastoquinone, cytochromes, PS II ferredoxin.

84 ➤ 12. The enzyme that is not found in a C3 plant is

(a) RuBP carboxylase (b) PEP carboxylase (c) NADP reductase (d) ATP synthase

85 ➤ 13. The reaction that is responsible for the primary fixation of CO2 is catalysed by

(a) RuBP carboxylase (b) PEP carboxylase (c) RuBP carboxylase and PEP carboxylase (d) PGA synthase

86 ➤ 14. When CO2 is added to PEP, the first stable product synthesised is

(a) Pyruvate (b) Glyceraldehyde–3–phosphate (c) Phosphoglycerate (d) Oxaloacetate

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