Photosynthesis Questions: Paper - 01 |
More Biology Questions | ||
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Photosynthesis Questions: Paper - 01 |
1. |
Sugar moves in phloem vessels as ______. (a) cellulose (b) glucose (c) starch (d) sucrose |
Answer: (d) Glucose is called principle carbohydrate, sucrose is called translocable carbohydrate, starch is called storage carbohydrate and cellulose is called structural carbohydrate |
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2.
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______ ions help in photolysis of water. (a) Mn++ (b) Mg++ (c) Cl- (d) both (a) and (c) |
Answer: (d) Magnoprotein is associated with photolysis of water, which contains Mn++ and Cl- as cofactor. |
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3.
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RUBISCO enzyme is also called as ______. (a) carboxytetra mutase (b) carboxydimutase (c) carboxytrimutase (d) carboxyunimutase |
Answer: (b) RUBISCO is called marker enzyme of chloroplast since it can perform carboxylation as well as oxidation, therefore also called carboxydimutase. |
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4.
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______ is precursor for abscissic acid (ABA) (a) Zeatin (b) Lutein (c) Violaxanthin (d) Mevalonic acid |
Answer: (c) Precursor for the biosynthesis of abscissic acid is violaxanthin, a type of xanthophyll found in leaves. |
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5.
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In young leaves ratio of carotene to Xanthophyll is ____. (a) 2 : 1 (b) 3: 1 (c) 1: 3 (d) 1: 2 |
Answer: (d) In young leaves cuticle is thin hence require more production therefore concentration of Xanthophyll is more than carotene which is more protective |
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6.
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Which of the following pigments contains open pyrolle ring? (a) Phycobilins (b) Xanthophylls (c) Chlorophylls (d) β-carotene |
Answer: (a) Chlorophylls are made of closed pyrolle, whereas Phycobilins are made of open pyrolle, Carotenoids are carbon hydrogen derivatives. |
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7.
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In which of the following light, rate of photosynthesis is maximum? (a) white (b) discontinuous white (c) red (d) blue |
Answer: (b) Discontinuous white light or intermittent light don’t increase the temperature, hence the rate of photosynthesis is maximum. |
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8.
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Quantum yield of photosynthesis is ______. (a) 13.5 % (b) 8 % (c) 13% (d) 12.5% |
Answer: (d) Quantum requirement of photosynthesis is 8 quanta, whereas quantum yield is 1/8 x 100 i.e., 12.5% |
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9.
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During light phase of photosynthesis ______ is oxidized and ______ is reduced. (a) CO2 and Water (b) Water and CO2 (c) Water and NADP (d) NADPH2 and CO2 |
Answer: (c) During light phase water is oxidized and the released hydrogen is accepted by NADP, hence is reduced to NADPH2. |
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10.
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During dark phase of photosynthesis ______ is oxidized and ______ is reduced (a) CO2 and Water (b) Water and CO2 (c)
Water and NADP (d) NADPH2 and CO2 |
Answer: (d) During dark phase the reduced NADPH2 transfer its hydrogen to CO2 which is reduced to carbohydrate. |
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11.
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The visible product of photosynthesis is ______. (a) glucose (b) cellulose (c) starch (d) fructose |
Answer: (c) Starch is visible product since it can be stained with iodine. |
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12.
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To produce 3 glucose molecules ______ ATP and ______ NADPH2 molecules are required. (a) 54, 36 (b) 54, 30 (c) 36, 60 (d) 18, 12 |
Answer: (a) 1 glucose molecule requires 18 ATP and 12 NADPH2 |
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13.
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Glycolytic reversal is a part of ______. (a) aerobic respiration (b) anaerobic respiration (c) light phase of photosynthesis (d) dark phase of photosynthesis |
Answer: (d) First phase of calvin cycle is called glycolytic reversal, which is a part of dark phase of photosynthesis. |
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14.
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RuBp carboxylase acts as RuBp carboxygenase at ______ CO2 conc. And ______ O2 conc. (a) low, low (b) low, high (c) high, high (d) high, low |
Answer: (b) During photorespiration RUBP carboxylase acts RUBP oxygenase under low CO2 High O2 concentrations. |
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15.
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The source of CO2 during calvin cycle in C4 plant is (a) Malic acid (b) OAA (c) PEP (d) RuDP |
Answer: (a) During C4 pathway malic acid undergo decarboxylaton to release CO2. |
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16.
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Dicot which follow C4 pathway is____. (a) wheat (b) Amranthus (c) Maize (d) Mango |
Answer: (b) Most of the C4 plant is monocot however exceptional dicot is Amaranthus. |
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17.
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Absorption spectrum of chlorophyll is maximum in _____ light. (a) red (b) blue (c) yellow (d) blue-violet |
Answer: (b) Absorption spectrum of chlorophyll is maximum in blue light whereas action spectrum is maximum in red light. |
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18.
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The oxygen molecule in glucose formed during photosynthesis comes from (a) Water (b) Organic acids (c) CO2 (d) atmosphere |
Answer: (c) Since glucose is formed form CO2 and hydrogen released from water hence oxygen comes from CO2. |
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19.
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Dimorphic chloroplast are present in ______. (a) zeamays (b) sacchrum officinale (c) sorghum bicolor (d) all of these |
Answer: (d) Dimorphic chloroplast or Kranz anatomy is the character feature of monocot, All the given options are monocot. |
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20.
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Red pigment in tomato is (a) b-carotene (b) Anthocyanin (c) Lycopene (d) Lutein |
Answer: (c) the biological name of the tomato is lycopersicon esculentum it is due the ther lycopene. |
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21.
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Solarisation refers to ______. (a) formation of sugar with help of water or energy (b) destruction of chlorophyll (c) synthesis of chl. (d) both b and c |
Answer: (b) Destruction of chlorophyll is due harmful light and oxygen called solarization. |
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22.
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Dark reaction requires light reaction for (a) carboxylation of RUBP (b) regeneration of RUBP (c) reduction of PGA (d) formation of hexose sugar |
Answer: (c) Product of dark reaction is NADPH2 required for reduction of PGA to PGAL |
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23.
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Emerson effect proves (a) concept of two photosystem in plant (b) photophosphorylation (c) photorespiration (d) there are light and dark reaction in photosynthesis |
Answer: (a) The concept of two photosystem in plant was proposed by emerson bases on red drop effect and enhancement effect. |
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24.
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Name a plant which do not perform photosynthesis is (a) Algae (b) Bryophyllum (c) cuscutta (d)Pitcher plant |
Answer: (d) Cuscutta is a parasite. |
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25.
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Light reaction of photosynthesis results in formation of ______. (a) O2 (b) NADPH + H+ (c) ATP (d) All of these |
Answer: (d) During light phase ATP and NADPH is product where as oxygen is byproduct produced during light phase. |
