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InterviewSolution
This section includes InterviewSolutions, each offering curated multiple-choice questions to sharpen your knowledge and support exam preparation. Choose a topic below to get started.
| 101. |
In chloroplast, the highest number of protons are found inA. StromaB. Lumen of thylakoidsC. Inter membrane spaceD. Antennae complex |
| Answer» Correct Answer - B | |
| 102. |
In chloroplast, the highest number of protons are found inA. lumen of thylakoids inter membrane speaceB. inter membrane spaceC. antennae complesD. stroma |
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Answer» Correct Answer - A Proton concentration is higher in the lumen of thylakoids because of the photolysis of water. `H^(+)` pumping and NADP reduce activity, which occurs in stroma of the chloroplast. |
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| 103. |
In a chloroplast the highest number of protons are found inA. lumen of thylokoidsB. inter membrane spaceC. antennae complexD. stroma |
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Answer» Correct Answer - A Proton concentration is higher in the lumen of thylokoid due to photolysis of water, `H^(+)` pumping ad NADP reductase activity which occurs in stroma of the chloroplast. |
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| 104. |
In a chloroplast the highest number of protons are found inA. StromaB. Lumen of thylakoidsC. Inter membrane spaceD. Antennae complex |
| Answer» Correct Answer - B | |
| 105. |
In a chloroplast the highest number of protons are found inA. Lumen of thylakoidsB. Inter membrane spaceC. Antennae complexD. Stroma |
| Answer» Correct Answer - A | |
| 106. |
The process which makes major difference between `C_(3)` and `C_(4)` plants isA. GlycolysisB. Calvin cycleC. PhotorespirationD. Respiration |
| Answer» Correct Answer - C | |
| 107. |
Which of the statements is not true of the `C_(4)` pathwayA. Overcomes loss due to photorespirationB. The `CO_(2)` acceptor is a `C_(3)` compoundC. Inhibited by low `CO_(2)` concentrationD. Required more energy than the `C_(3)` pathways fir production of glucose |
| Answer» Correct Answer - C | |
| 108. |
Which does not show HSK pathway?A. MaizeB. JowarC. SugarcaneD. Sunflower |
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Answer» Correct Answer - D Sunflower does not show `HSK(C_(4))` pathway |
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| 109. |
Minerals involved in the photo-oxidation of water isA. Mn, Cl, CaB. Mg, Fe, MnC. Mn , Fe, CaD. N,P,K |
| Answer» Correct Answer - A | |
| 110. |
Which of the following scientists concluded by his experiments that green plant parts play a role in prfying the noxious air only in the pressure of sunligth?A. PreistleyB. IngenhouszC. SachsD. Engelmann |
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Answer» Correct Answer - B Jan Ingenhousz (1730-1799), In his experiment with an aquatic plant, showed that in bright sunlight, small bubble were formed around the green parts while in the dark no such bubbles formed He found out these bubbles to be of oxygen He thus, cnfirmed that purification of air or formation of dephlogiston is carried out by green plants only in presents of sunlight. |
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| 111. |
If a photosynthesizing plant release oxygen containing more than normal amount of 180, it is concluded that the plant has been supplied withA. `C_(6)H_(12)O_(6)` containing `""^(18)O`B. `H_(2)O` containing `""_(18)O`C. `CO_(2)` containing `""_(18)O`D. Oxygen in the form of ozone |
| Answer» Correct Answer - B | |
| 112. |
A photosynthesizing plant is releasing O more than the normal. The plant must have been supplied withA. `O_(3)`B. `H_(2)O with""^(18)O`C. `C_(6)H_(12)O_(6)with""^(18)O`D. `CO_(2)with""^(18)O` |
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Answer» Correct Answer - B A photosynthesizing plant is releasing .codt^(18)O` more than the normal. The plant must have been supplied with `H_(2)O "with" cdot^(18)O` |
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| 113. |
Refer to the given diagrammatic representation of an electron micrograph of a section of chloroplast and answer the Select the option which correctly depicts the functions of parts X,Y and ZA. `{:(X,Y,Z),("Dark reaction","Light reaction","Cytoplasmic inheritance"):}`B. `{:(X,Y,Z),("Light reaction","Carbohydrate synthesis","Carbohydrate storage"):}`C. `{:(X,Y,Z),("Light reaction","Carbohydrate storage","Carbohydrate synthesis"):}`D. `{:(X,Y,Z),("Carbohydrate synthesis","Carboyhydrate storage","Cytoplasmic inheritance"):}` |
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Answer» Correct Answer - B Light reactions (or photochemical phase) of photosynthesis mainly occur on the grana thylakoids. Dark reactions (or biosynthetic phase) which involves synthesis of chrbophydrates by `CO_(2)` fixation, occur in the stroma (or matrix) of chloroplasts. The chloroplast matrix of higher plants stores starch temproality in the form of starch granules. |
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| 114. |
A photosynthesising plant is releasing `.^(18)O` more than the normal. The plant must have been supplied withA. `O_3`B. `H_2O` with `.^18O`C. `CO_2` with `.^18O`D. `C_2H_12O_6` with `.^18O`. |
| Answer» Correct Answer - B | |
| 115. |
A photosynthesising plant is releasing `.^(18)O` more than the normal. The plant must have been supplied withA. `O_(3)`B. `H_(2)O` with `.^(18)O`C. `CO_(2)` with `.^(18)O`D. `C_(6)H_(12)O_(6)` with `.^(18)O` |
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Answer» Correct Answer - B Ruben, Hassid and Kamen (1941) using heavy isotope of oxygen, `O^(18)` in water, found that oxygen evolved in photosynthesis comes from water evolution of oxygen does not require carbon dioxide. |
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| 116. |
In an experiment, the carbon dioxide available to a `C_(3)` plant was labelled with a radioactive isotope and the amount of radioactivity in the chloroplast was measured.As photosynthesis proceeded, in which of the following molecules did the radioactivity first appear ?A. PGALB. PEPC. PGAD. RuBP |
| Answer» Correct Answer - C | |
| 117. |
Refer to the given diagrammatic representation of an electron micrograph of a section of chloroplast and answer the Select the option that correct identifes X,Y and Z.A. `{:(X,Y,Z),("Stroma","Grana","Chloroplast DNA"):}`B. `{:(X,Y,Z),("Stroma","Grana","Starch granule"):}`C. `{:(X,Y,Z),("Grana","Stroma","Starch granule"):}`D. `{:(X,Y,Z),("Grana","Stroma","Chloroplast DNA"):}` |
| Answer» Correct Answer - C | |
| 118. |
Radioactive carbon dioxide `(.^14CO_2)` is added to suspension of a photosynthesising green alga. Which compound will be labelled first with `.^14CO_2` ?A. GlucoseB. RuBPC. GP(PGA)D. Triose phosphate |
| Answer» Correct Answer - C | |
| 119. |
If green plant cells are incubated with `O^(18)`labelled `CO_(2)`. Which of the following molecules will become radioactive when the cells are exposed to light?A. ATPB. WaterC. SugarD. `O_(2)` |
| Answer» Correct Answer - C | |
| 120. |
If green plant cells are incubated with `O^(18)`- labelled water, which of the following molecuels will become radioactive when the cells are exposed to light?A. `O_(2)`B. `CO_(2)`C. `H_(2)O`D. Sugar |
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Answer» Correct Answer - A |
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| 121. |
Wavelenght of green light isA. `400-450 mmu`B. `500- 550 mmu`C. `660- 720 mmu`D. `720- 800mmu` |
| Answer» Correct Answer - B | |
| 122. |
Select the incorrectly matched pair with regard to `C_4`-cycle.A. Primary `CO_2` fixation - PGA productB. Primary `CO_2` acceptor - PEPC. `C_4`-plant - MaizeD. Location of enzyme RuBisCO - Bundle sheath cells |
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Answer» Correct Answer - A The primary `CO_2` fixation product in `C_4`-cycle is oxaloncetic acid (OAA). |
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| 123. |
Chemosynthesis and photosythesis are alike in that bothA. Are associated with heterotophB. Requires sunlight as an energy sourceC. Methods of autotrophic nutritionD. Occur in tracheophytes |
| Answer» Correct Answer - C | |
| 124. |
Which of the following statements is true with regard to the light reaction of photosythesisA. In PS-II the reaction centre chlorophyll -a has an absorption peak at 700 nm and is called `P_(700)`B. In PS-I the reaction centre chlorophyll -a has an absorption maxima at 680 nm and is called `P_(680)`C. The splitting of water molecule is associated with PS-ID. Photosystem -I and II are involved in Z-cheme |
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Answer» Correct Answer - D Photophosphorylation is the synthesis of ATP from ADP and inorganic phosphate in the presence of sum light .When the two photosystems , work in a series, first PS-II and then the PS-I , a process called non - cyclic photophosphorylation occurs. The two photosystems are connected through an electron transport chain in the Z scheme (due to the shape of path of electrons flow.) Both ATP and `NADPH+H^(+)` are synthesised by this kind of electron flow. |
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| 125. |
Which o fht efollowing statements is true with regard to the light reaction of photosythesisA. In PSII the reaction centre chorophyll a has an absorpition peak at 700 nm , hence is called P 700B. In PS I the reaction centree chorophyyll a has an absorpition maxima at 680 nm and is called P680C. The splitting of water molecule is associated with PSID. Photosystems I and II are involved in Z scheme |
| Answer» Correct Answer - D | |
| 126. |
The mapping of the pahtway of carbon assimilation in photosythesis earned Noble Prize in 1961 toA. Melvin CalvinB. Alfonso CortiC. Henry DixonD. Carl Mobius |
| Answer» Correct Answer - A | |
| 127. |
In Photosytem-I (PSI) of light reaction which substrate works as an electron acceptor?A. `NAD^(+)`B. `ADP`C. `NADP^(+)`D. `FADH^(+)` |
| Answer» Correct Answer - C | |
| 128. |
Solar energy is converted into ATP in or Light energy is converted into chemial energy in the presence ofA. MitochondriaB. ChloroplastsC. RibosomesD. Peroxisone |
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Answer» Correct Answer - B The main function of chloroplast is photosynthesis, in which radiant energy of sun is converted into chemical form of energy (ATP), which is utilized by all living organisms to perform their life activities. |
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| 129. |
Synthesis of `ADP+P i rarr ATP` in grana/photosynthesis isA. phosphorylationB. oxidative phosphorylationC. photophosphorylationD. photolysis |
| Answer» Correct Answer - C | |
| 130. |
Grana present in chloroplast refers toA. Stroma lamellaeB. Stracks of quantansomesC. stacks of thylakoidsD. Double membranous envelops |
| Answer» Correct Answer - C | |
| 131. |
Synthesis of ADP+ Pi ~ ATP in grana photosynthesis isA. PhosphorylationB. PhotophosphorylattonC. Oxidative phosphorylationD. Photolysis |
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Answer» Correct Answer - B Synthesis of `ADP+Pi to ATP` in grana photosynilltisis is photophosphorylation. |
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| 132. |
____ is the process of synthesis of ATP from ADP and Pi in the presence of light.A. PhosphorylationB. PhotophosphorylationC. PhotosystemD. Oxidative phosporylation |
| Answer» The process by which ATP is sysnthesised by cells in mitochondria and chloroplasta is named as phosphorylation. Photophosphorylation is the synthesis of ATP from ADP and inorganic phosphate (Pi) in the presence of light, inside chloroplast. Photosphosphorylation is of two main types-Cyclic and non-cyclic photophosphorylation. | |
| 133. |
In grana of chloroplast , the reaction `ADP+Pi=ATP ` during day showsA. oxidative phosporylationB. photophosphorylationC. substrate level phophorylationD. dephosphorylation |
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Answer» Correct Answer - B In photophosphorylation and oxidative phosphorylation , ATP is/are synthesised. The only difference is that in photophosphorylation ,ATP molecules are synthesised in the presence of light and in oxidative phosphorylation ATP molecules are synthesised without light. |
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| 134. |
Which fractions of the visible spectrum of solar radiations are primarily absorbed by carotenoids of the higher plantsA. Violet and blueB. Blue and greenC. Green and redD. Red and Violet |
| Answer» Correct Answer - A | |
| 135. |
Which fractions of the visible spectrum of solar radiations are primarily absorbed by carotenoids of the higher plantsA. Blue and greenB. Green and redC. Red and violetD. Violet and blue |
| Answer» Correct Answer - C | |
| 136. |
Which fractions of the visible spectrum of solar radiations are primarily absorbed by carotenoids of the higher plantsA. violet and blueB. blue nad greenC. green and redD. red and violet |
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Answer» Correct Answer - A Carotenoids are a group of yellow, red and orange pigments which function as accessory pigments and protect chlorophyll molecules from destruction by intensive light rays. Carotenoids have three absorption peaks in the blue-violet range of the spectrum. |
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| 137. |
Which one of the following is wrong in relation to photorespirationA. it is a characteristic of `C_(3)`-plantsB. it occurs in chloroplastsC. It occurs in day time onlyD. it is a characteristic of `C_(4)`-plants |
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Answer» Correct Answer - D Dicker and Tio (1959) discovered photorespiration in tobacco plant. It is a light depedent process of oxygenation of Ribulose Bisphoshate (RuBP). During this process `CO_(2)` is liberated and `O_(2)` is consumed. `C_(4)`-plants avoid photorespiration by following hatch slack pathway. |
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| 138. |
Which of the following is incorrecty in relation to photorespiration ?A. It releases `CO_2`B. It is a characteristics of `C_3`-plantsC. It occurs in chloroplastsD. It occurs in daytime only |
| Answer» Correct Answer - D | |
| 139. |
Photosynthetically active radiation (PAR) represents the following range of wavelengthA. 400-700 nmB. 500-600 nmC. 450-950 nmD. 340-450 nm |
| Answer» Correct Answer - A | |
| 140. |
Which one of the following is wrong in relation to photorespirationA. It occurs in chloroplasts.B. It occurs in daytime only.C. It is a characteristic of `C_(4)` plantsD. It is a characteristic of `C_(3)` plants. |
| Answer» Correct Answer - C | |
| 141. |
Choose the correct match. Bladderwort , sundew, venus, flytrapA. Nepenthes, Dionaea, DroseraB. Nepenthes, Utricularia , vandaC. Utricularia, Drosera, DionaeaD. Dionaea, Trapa , Vanda |
| Answer» Correct Answer - C | |
| 142. |
In purple and green sulphur bacteria, the hydrogen donor isA. `H_(2)S`B. `H_(2)O`C. `H_(2)SO_(4)`D. Sulphate |
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Answer» Correct Answer - A In purple and green sulphur bacteria, the hydrogen donor is `H_(2)S` |
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| 143. |
Assertion: In green plants `H_(2)O` is the hydrogen donor and is oxidised to `O_(2)` Reason: In the purple and green sulphur bacteria, the oxidation product is sulphur or sulphate depending on the organism and not `O_(2)`.A. If both assertion and reason are true and the reason 1s the correct explanation of the assertion.B. If both assertion and reason are true but reason is not the correct explanation of the assertion.C. If assertion is true but reason is false.D. If both assertion and reason are false. |
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Answer» Correct Answer - B In green plants `H_(2)O` is the hydrogen donor and is oxidised to `O_(2)`. In the purple and green sulphur bacteria, the oxidation product is sulphur or sulphate depending on the organism and not `O_(2)` |
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| 144. |
Splitting of water is associated withA. photosystem -IB. lumen of thlakoidC. both photosystem -I and IID. inner surface of thylakoid membrane |
| Answer» Correct Answer - D | |
| 145. |
Splitting of water is associated withA. photosystem IB. lumen of thylakoidC. both photosystem I and IID. inner surface of thylakoid membrane |
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Answer» Correct Answer - D Light reactions occur inside the thylakoids, especially those of grana region. It involves two types of reactions photolysis of water and production of assimilatory power. Oxygen in the illuminated chloroplasts is called photolysis or photocatalytic splitting of water. Water spilitting complex is associated with the PSII, which iteself is physically located on the inner surface of thylakoid membrane. `4H_(2)OhArr4H^(+)+4OH^(-)` `4OH^(-)underset5(Mn^(2+).Ca^(2+),Cl^(-))overset("Oxygen evolving complex")rarr2H_(2)O+O_(2)uparrow+4e^(-)` |
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| 146. |
How much assimilatory power is produced per molecule of oxygen produced in light reaction ?A. `2ATP + 1NADPH_(2)`B. `2ATP +2NADPH_(2)`C. `1ATP +1NADPH_(2)`D. `1ATP + 2NADPH_(2)` |
| Answer» Correct Answer - B | |
| 147. |
To reduce `1 CO_(2)` molecules in `C_(3)` cycle , assimilatory power needed isA. `3ATP, 2NPDPH_(2)`B. `2ATP, 2NADPH_(2)`C. `5 ATP, 2NADPH_(2)`D. `6.5 ATP, 2NADPH_(2)` |
| Answer» Correct Answer - A | |
| 148. |
Assertion: The splitting of water is associated with PS II. Reason: Water is split into `H^(+),O_(2)` and electrons. |
| Answer» Correct Answer - B | |
| 149. |
Where are the protons and `O_(2)`, formed during splitting of water, likely to be released. |
| Answer» Correct Answer - In lumen of thylakoid | |
| 150. |
Which element plays a vital role in splitting of water to liberate oxygen during photosynthesis ?A. CopperB. BoronC. ChlorineD. Manganese |
| Answer» Correct Answer - D | |