MCQOPTIONS
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MCQOPTIONS
This section includes 14620 Mcqs, each offering curated multiple-choice questions to sharpen your NEET knowledge and support exam preparation. Choose a topic below to get started.
| 6051. |
Through which of the following substances the photosystem-I passes an electron to NADP during light reactions [AMU 1987; Bihar MDAT 1991] |
| A. | Plastocyanin |
| B. | Plastoquinone |
| C. | Cytochrome |
| D. | Ferredoxin |
| Answer» E. | |
| 6052. |
Chlorophyll is present [CPMT 1987] |
| A. | On the surface of chloroplast |
| B. | In the stroma of chloroplast |
| C. | In the grana of chloroplast |
| D. | Dispersed throughout the chloroplast |
| Answer» D. Dispersed throughout the chloroplast | |
| 6053. |
Light is necessary during photosynthesis for [NCERT 1978] |
| A. | Evolution of hydrogen |
| B. | Photolysis of water |
| C. | Heating |
| D. | Opening of stomata |
| Answer» C. Heating | |
| 6054. |
Photophosphorylation is a process in which [NCERT 1984; CPMT 1980, 84; MP PMT 1989, 96] |
| A. | Light energy is converted into chemical energy in the form of ATP |
| B. | NADP is formed |
| C. | Chemical energy is used to produce ATP |
| D. | \[C{{O}_{2}}\]is reduced to carbohydrate |
| Answer» B. NADP is formed | |
| 6055. |
Pigment system-II is concerned with [BHU 1981,92, 2003; MHCET 2000] |
| A. | Photolysis of water |
| B. | Reduction of\[C{{O}_{2}}\] |
| C. | Flowering |
| D. | None of the above |
| Answer» B. Reduction of\[C{{O}_{2}}\] | |
| 6056. |
Pigment system-I conducts [JIPMER 1986, 90; AMU 1987] |
| A. | Cyclic photophosphorylation |
| B. | Non-cyclic photophosphorylation |
| C. | Both [a] and [b] |
| D. | None of the above |
| Answer» B. Non-cyclic photophosphorylation | |
| 6057. |
Where does the primary photochemical reaction occur in chloroplast or Where does the light reactions of photosynthesis take place or Light reaction takes place in [RPMT 1985,95, 99; CPMT 1984,95,98; MP PMT 1988, 99; Pb. PMT 1999,2000] |
| A. | Stroma |
| B. | Edoplasmic reticulum |
| C. | Quantasome or thylakoids (Grana) |
| D. | Inner membrane of chloroplast |
| Answer» D. Inner membrane of chloroplast | |
| 6058. |
Blue-green algae shows |
| A. | Chlorophyll 'a' |
| B. | Chlorophyll 'b' |
| C. | Both [a] and [b] |
| D. | None of the above |
| Answer» B. Chlorophyll 'b' | |
| 6059. |
The trapping centre of light energy in photosystem-I is [BHU 1983, 2000; JIPMER 1988; BVP 2003] |
| A. | P-660 |
| B. | P-680 |
| C. | P-700 |
| D. | P-720 |
| Answer» D. P-720 | |
| 6060. |
Which of the following pigment is soluble in water [MP PMT 1989; CPMT 1983, 94] |
| A. | Chlorophyll |
| B. | Carotene |
| C. | Anthocyanin |
| D. | Xanthophyll |
| Answer» D. Xanthophyll | |
| 6061. |
The basic structure of all chlorophyll comprises of [BHU 1983] |
| A. | Porphyrin system |
| B. | Cytochrome system |
| C. | Plastocyanin system |
| D. | Flavoproteins only |
| Answer» B. Cytochrome system | |
| 6062. |
The brown colour of some algae is due to the presence of pigments [DPMT 1991] |
| A. | Chlorophyll |
| B. | Phycocyanin |
| C. | Carotene |
| D. | Fucoxanthin |
| Answer» E. | |
| 6063. |
When a cell convert light energy into chemical energy, which of the following reaction would take place [MP PMT 1989; BHU 1980] |
| A. | ADP + IP = ATP |
| B. | ATP - IP = ADP |
| C. | AMP + IP = ADP |
| D. | GDP + P = GTP |
| Answer» B. ATP - IP = ADP | |
| 6064. |
Pigment system-I recieves radiant energy and releases electron [MP PMT 1992] |
| A. | Chlorophyll-683 |
| B. | Chlorophyll-673 |
| C. | Chlorophyll-695 |
| D. | P-700 |
| Answer» E. | |
| 6065. |
NADP is converted into\[NADP{{H}_{2}}\]in [CBSE PMT 1988] |
| A. | Photosystem-I |
| B. | Non-cyclic photophosphorylation |
| C. | Calvin cycle |
| D. | Photosystem-II |
| Answer» C. Calvin cycle | |
| 6066. |
In cyclic photophosphorylation which one of the following is formed [AMU 1988] |
| A. | ATP |
| B. | NADP and ATP |
| C. | \[NAD{{H}_{2}}\]and\[{{O}_{2}}\] |
| D. | \[NADP{{H}_{2}}\], \[ATP\]and\[{{O}_{2}}\] |
| Answer» B. NADP and ATP | |
| 6067. |
The site of oxygen evolution and photosynthetic phosphorylation in chloroplast are [MP PMT 1988] |
| A. | Matrix |
| B. | Grana stacks |
| C. | Inner wall of chloroplast |
| D. | Surface of chloroplast |
| Answer» C. Inner wall of chloroplast | |
| 6068. |
The specific function of light energy in the process of photosynthesis is to [CPMT 1978, 81, 84; MP PMT 1984, 89] |
| A. | Activate chlorophyll |
| B. | Split water |
| C. | Reduce carbon dioxide |
| D. | Synthesize glucose |
| Answer» B. Split water | |
| 6069. |
The light phase of photosynthesis is called |
| A. | Hill reaction |
| B. | Photo action |
| C. | Pigment action |
| D. | Chlorophyllous process |
| Answer» B. Photo action | |
| 6070. |
In blue-green algae photosystem-II contain an important pigment concerned with photolysis of water it is called [BHU 1989, 90] |
| A. | Beta carotene |
| B. | Chlorophyll 'b' |
| C. | Cytochrome 'c' |
| D. | Phycocyanin |
| Answer» E. | |
| 6071. |
The source of\[{{O}_{2}}\]liberated in photosynthesis in green plants is [CPMT 1982, 84, 91, 94, 95; DPMT 1983, 84; MP PMT 1984, 2002; Bihar MDAT 1992; RPMT 1999] |
| A. | Photosynthetic enzyme |
| B. | Carbohydrate present in leaf |
| C. | Water |
| D. | Carbon dioxide |
| Answer» D. Carbon dioxide | |
| 6072. |
In\[{{C}_{3}}\]plants, phosphoketopentose epimerage is required for converting |
| A. | Ribose into ribulose |
| B. | Xylulose to ribulose\[1,5Di\,\,P{{O}_{4}}\] |
| C. | Erythrose to xylulose |
| D. | None of the above |
| Answer» C. Erythrose to xylulose | |
| 6073. |
Photosystem-II occurs in [CBSE PMT 1992; RPMT 1999; BHU 2001] |
| A. | Stroma |
| B. | Grana |
| C. | On surface of mitochondria |
| D. | On cytochrome |
| Answer» C. On surface of mitochondria | |
| 6074. |
Which of the chlorophyll type ejects the electron during photophosphorylation |
| A. | Chlorophyll 'b' |
| B. | Chlorophyll 'a' |
| C. | Chlorophyll 'a' and 'b' |
| D. | Xanthophyll |
| Answer» C. Chlorophyll 'a' and 'b' | |
| 6075. |
Quantasomes are present in |
| A. | Pigment system-I |
| B. | Pigment system-II |
| C. | Both [a] and [b] |
| D. | None of the above |
| Answer» D. None of the above | |
| 6076. |
\[NADP{{H}_{2}}\]is generated through [CBSE PMT 1997] |
| A. | Glycolysis |
| B. | Photosystem-I |
| C. | Photosystem-II |
| D. | Anaerobic respiration |
| Answer» C. Photosystem-II | |
| 6077. |
What is the absorption maxima of P-700 |
| A. | \[\text{700}\overset{\text{o}}{\mathop{\text{A}}}\,\] |
| B. | 683 nm |
| C. | 700 cm |
| D. | 700 nm |
| Answer» E. | |
| 6078. |
The process for which manganese and chloride ions are required is |
| A. | Photolysis of water |
| B. | For transfer of\[{{H}^{+}}\]ion to NADP |
| C. | For transfer of charge of hydroxyl ion to chlorophyll |
| D. | None of the above |
| Answer» B. For transfer of\[{{H}^{+}}\]ion to NADP | |
| 6079. |
What is the quantum yield of photosynthesis |
| A. | 0.08 |
| B. | 0.12 |
| C. | 0.09 |
| D. | 0.33 |
| Answer» C. 0.09 | |
| 6080. |
Chlorophyll 'e' is generally present in |
| A. | Thallophytes |
| B. | Rhodophytes |
| C. | Mycophytes |
| D. | Xanthophytes |
| Answer» E. | |
| 6081. |
If E is Emerson effect, x is the rate of oxygen production in mixed beam of light, y is the rate of\[{{O}_{2}}\]production in low wavelength of light and z is the rate of\[{{O}_{2}}\]evolution in high intensity of red light. What will be the value of E |
| A. | \[\frac{x-u}{z}\] |
| B. | \[\frac{x-z}{u}\] |
| C. | \[\frac{z-u}{x}\] |
| D. | \[\frac{z-x}{u}\] |
| Answer» B. \[\frac{x-z}{u}\] | |
| 6082. |
How many molecules of water should be photolysed to form a\[NADP{{H}_{2}}\]molecule |
| A. | 4 |
| B. | 2 |
| C. | 6 |
| D. | 1 |
| Answer» C. 6 | |
| 6083. |
Solarisation is [BHU 2005] |
| A. | Formation of chlorophyll |
| B. | Destruction of chlorophyll |
| C. | Utilisation of sunlight |
| D. | Effects of solar light |
| Answer» C. Utilisation of sunlight | |
| 6084. |
Chlorophyll molecule (PS-II) when excited and electron so released passes first into |
| A. | Plastoquinone |
| B. | Plastocyanin |
| C. | Ferredoxin |
| D. | Ferredoxin reducing substrate |
| Answer» B. Plastocyanin | |
| 6085. |
Which of the following product of photosynthesis is produced first |
| A. | Glucose |
| B. | Oxygen |
| C. | Both [a] and [b] together |
| D. | None of the above |
| Answer» C. Both [a] and [b] together | |
| 6086. |
Which of the following method is responsible for ATP production by green plants cells in the presence of sunlight [AMU 2005] |
| A. | By phosphorylation only |
| B. | By oxidative phosphorylation only |
| C. | By only substrate level phosphorylation |
| D. | All of these |
| Answer» E. | |
| 6087. |
The radiation energy of light is converted to chemical energy and stored as [Orissa JEE 2005] |
| A. | AMP |
| B. | ADP |
| C. | ATP |
| D. | APP |
| Answer» D. APP | |
| 6088. |
Photosynthesis of light reaction occur in [AMU 2005] |
| A. | Only absence of light |
| B. | Only present of light |
| C. | Presence and absence of light |
| D. | Absent of light in maximum intensity |
| Answer» D. Absent of light in maximum intensity | |
| 6089. |
Which of the following occurs first in the light reaction |
| A. | Oxidation of chlorophyll |
| B. | Photolysis of water |
| C. | Evolution of\[ATP\]and\[{{O}_{2}}\] |
| D. | Production of\[{{O}_{2}}\]and\[NADP{{H}_{2}}\] |
| Answer» B. Photolysis of water | |
| 6090. |
Photophosphorylation differs from oxidative phosphorylation in |
| A. | It takes place in light |
| B. | ATP is formed |
| C. | Cytochrome participates |
| D. | All the above |
| Answer» B. ATP is formed | |
| 6091. |
The light energy passes in the form of |
| A. | Photo ions |
| B. | Photons |
| C. | Photosomes |
| D. | All the above |
| Answer» C. Photosomes | |
| 6092. |
In non-cyclic photophosphorylation, there are [Manipal 2005] |
| A. | \[24{{H}^{+}}\] |
| B. | \[36{{H}^{+}}\] |
| C. | \[12{{H}^{+}}\] |
| D. | \[32{{H}^{+}}\] |
| Answer» D. \[32{{H}^{+}}\] | |
| 6093. |
Which of the following wavelength occur in red part of the spectrum |
| A. | 470 nm |
| B. | 390 nm |
| C. | 680 nm |
| D. | 830 nm |
| Answer» D. 830 nm | |
| 6094. |
The value of\[{{Q}_{10}}\]for photosynthesis is |
| A. | 4 |
| B. | 6 |
| C. | 7 |
| D. | 2 |
| Answer» E. | |
| 6095. |
In noncyclic photophosphorylation, the pigment molecule first excited is [MHCET 2004] |
| A. | \[{{P}_{680}}\] |
| B. | \[{{P}_{700}}\] |
| C. | Chlorophyll-b |
| D. | Xanthophyll |
| Answer» B. \[{{P}_{700}}\] | |
| 6096. |
Cyclic photophosphorylation produces [MHCET 2004] |
| A. | \[\text{NADPH}\] |
| B. | \[\text{ATP}+\text{NADPH}\] |
| C. | \[\text{ATP}\] |
| D. | \[\text{ATP}+\text{NADPH}+{{\text{O}}_{\text{2}}}\] |
| Answer» D. \[\text{ATP}+\text{NADPH}+{{\text{O}}_{\text{2}}}\] | |
| 6097. |
The reaction centre is located in [MHCET 2002] |
| A. | Chlorophyll 'b' |
| B. | Carotene |
| C. | Xanthophyll |
| D. | Chlorophyll 'a' |
| Answer» E. | |
| 6098. |
Non-cyclic photophosphorylation involves [MHCET 2002] |
| A. | PS-I or PS-II |
| B. | PS-I only |
| C. | PS-II only |
| D. | Stroma matrix |
| Answer» D. Stroma matrix | |
| 6099. |
Photolysis of water by isolated chloroplasts was demonstrated by [AIEEE 2004] |
| A. | Robin Hill |
| B. | Van Niel |
| C. | Liebig |
| D. | Calvin |
| Answer» B. Van Niel | |
| 6100. |
Photosynthetically active radiation (PAR) represents the following range of wavelength [CBSE PMT 1996, 2005] |
| A. | 340-450 mm |
| B. | 400-700 mm |
| C. | 500-600 mm |
| D. | 450-950 mm |
| Answer» C. 500-600 mm | |