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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.
| 751. |
Members of family Crassulaceae performA. `C_(3)` photosynthesisB. CAM photosybthesisC. `C_(4)` photosynthesisD. All of the above |
| Answer» Correct Answer - B | |
| 752. |
Glycolate accumulates in chloroplasts when there isA. High `CO_(2)`B. Bright lightC. Low temperatureD. Low `CO_(2)` |
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Answer» Correct Answer - D Glycolate accumulates in chloroplasts when there is low `CO_(2)` (during photoerspiration). |
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| 753. |
The glycolate metabolisam occur inA. LysosomesB. RibosomesC. GlyoxysomesD. Peroxisomes |
| Answer» Correct Answer - D | |
| 754. |
Find out the wrong statementA. CAM plants open their stomata at night and close during day timeB. Spilitting of water takes place in the chloroplasts membraneC. PSI is found in stromal as well as granal thylakoidsD. Current availability of `CO_(2)` levels is limiting to the `C_(3)` plants |
| Answer» Correct Answer - B | |
| 755. |
The `C_(2)` glycolate cycle is also known asA. PCRB. PCOC. PPPD. EMP |
| Answer» Correct Answer - B | |
| 756. |
Kranz anatomy is typical ofA. `C_4`-plantsB. `C_3`-plantsC. `C_2`- plantsD. CAM plants |
| Answer» Correct Answer - A | |
| 757. |
Identify the reaction for which the `C_(4)` plants require some extra ATP molecules in comparison to `C_(3)` plantsA. Conversion of PEP to OAAB. Conversion of Pyruvate to PEPC. Conversion of Malate to OxaloacetateD. Conversion of PEP to Malate |
| Answer» Correct Answer - B | |
| 758. |
Which group of plants are not beefitted by `CO_(2)` fertilisation effect ?A. Plants requiring 3 ATP per ` CO_(2)` fixationB. Plants with Kranz anatomyC. Plants having high rate of photorespirationD. Plants having single carboxylation |
| Answer» Correct Answer - B | |
| 759. |
`C_(4)` plants are spacial, They have special type of (A)_____ they tolerate (B)____,they show a response to (C)______, they lack a process called (D)_____ and have greater (E)____ |
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Answer» Correct Answer - A-leaf anatomy B-Higher temperature C-High light intensities D-Photorespiration E-productivity f biomass |
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| 760. |
This is not a `C_(3)` plantA. AmaranthusB. RiceC. WheatD. Potato |
| Answer» Correct Answer - A | |
| 761. |
`C_(4)` plants can tolerate saline conditions due toA. Occurrence of organic acidsB. Absence of photorespirationC. Presence of PEP synthetase enzymeD. Presence of PEP carboxylase enzyme |
| Answer» Correct Answer - A | |
| 762. |
The enzyme that is not found in a `C_(3)` plant isA. RuBP carboxylaseB. PEP carboxylaseC. NADP reductaseD. ATP synthase |
| Answer» Correct Answer - B | |
| 763. |
In `C_(4)` plants, the bundle sheath cellsA. Have thin walls to facilitate gaseous exchangeB. Have large intercellular spacesC. Are rich in PEP CarboxylaseD. Have a high density of chloroplasts |
| Answer» Correct Answer - D | |
| 764. |
`C_(4)` plants are less efficient at low temperature due toA. Low ` O_(2)` affinity of PEPcaseB. Cold sensitivity of PEP synthetase enzymeC. Reduced rate of decarboxyaltion of organic acidsD. High energy requirement for ` CO_(2)` fixation |
| Answer» Correct Answer - B | |
| 765. |
The enzyme that catalyses carbon dioxide fixation in `C_(4)` plants isA. RuBP carboxylase (RUBISCO)B. PEP carboxylase (PePco)C. Carbonic anhydraseD. Caroxy dismutase |
| Answer» Correct Answer - B | |
| 766. |
`C_(4)` plants are abundant inA. temperate region with more humid conditionsB. temperature region with more dry conditionsC. tropical region with more humid conditionsD. tropical region with more dry conditions |
| Answer» Correct Answer - D | |
| 767. |
The enzyme that catalyses carbon dioxide fixation in `C_(4)` plants isA. aldolaseB. PEP carboxylaseC. RuBP carboxylaseD. isomerase |
| Answer» Correct Answer - B | |
| 768. |
The visible prtion of light spectrum useful in photosynthesis is referred to asA. RFLPB. PARC. VAMD. VNTR |
| Answer» Correct Answer - B | |
| 769. |
The enzyme that catalyses carbon dioxide fixation in `C_(4)` plants isA. RuBP carboxylaseB. PEP carboxylaseC. carbonic anhydraseD. carboxydismutase |
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Answer» Correct Answer - B In `C_(4)`-plants, mesophyll cells fix carbon dioxide with the help of phosphoenol-pyruvate (the first acceptor) in the presence of PEP carboxylase to a compound oxaloacetic acid (first product). |
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| 770. |
What is correct about Dark Reactions ?A. It is called Hill reactionB. It is biochemical, enzymatic, rate determining slow reactionC. It is independent of temperatureD. All of these |
| Answer» Correct Answer - B | |
| 771. |
Cyclic photosphorylation results in the formation ofA. `NADPH+H^(+)`B. `ATP and NADPH +H^(+)`C. ADPD. ATP |
| Answer» Correct Answer - D | |
| 772. |
……are CAM plantA. Maize, papayaB. Pineapple, agaveC. Onion, mangoD. Pea, sugarcane |
| Answer» Correct Answer - D | |
| 773. |
Photorespiration shows formation ofA. Sugar but not ATPB. ATP but not sugarC. Both ATP and sugarD. Neither ATP nor sugar |
| Answer» Correct Answer - D | |
| 774. |
Which one is a `C_(4)` plantA. SorghumB. TribulusC. MaizeD. All of these |
| Answer» Correct Answer - B | |
| 775. |
The steps of dark reactions areA. regeneration `to` carboxylation `to` reductionB. reduction `to` oxidation `to` hydrogenationC. carboxylation `to` reduction `to` regenerationD. reduction `to` carboxylation `to` regneration |
| Answer» Correct Answer - C | |
| 776. |
Which of the following is a 4-carbon compound?A. oxaloacetic acidB. Phophoglyceric acidC. Ribulose biosphophateD. Phosphoenol pyruvate |
| Answer» Correct Answer - A | |
| 777. |
What is the quantum yield of photosynthesisA. `33%`B. `9%`C. `12%`D. `78%` |
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Answer» Correct Answer - C Quantum yield of photosynthesis is derived from light intensity and rate of photosynthesis . It is `12%` in grassland ecosystem. |
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| 778. |
ATP synthesis in cell requiresA. `H^(+)` gradient across the membraneB. `K^(+)` gradient across the membraneC. `PO_(4)^(3-)` gradient across the membraneD. `Ca^(2+)` gradient across the membrane |
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Answer» Correct Answer - A ATP synthesis takes place by the process of chemiosmosis, where ATP is genterated via pronon `(H^(+))` gradient across the membrane. As proton moves from inside to outside across a membrane some configuration change occurs in the ATPase which start catalysing formation of ATP. |
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| 779. |
For synthesis of a molecule of glucose. the requirement of ATP and NADPH is respectivelyA. 15 and 10B. 12 and 18C. 12 and 6D. 18 and 12 |
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Answer» Correct Answer - D For synthesis of a molecule of glucose, 18 ATP, 12 NADPH and `6CO_(2)` are required. |
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| 780. |
Synthesis of one molecule of glucose requiresA. `6CO_2,18 ATP and 12 NADPH`B. `6 CO_2, 12 ATP and 18 NADPH`C. `6CO_2, 30 ATP and 12 NADPH `D. `5CO_2, 38 ATP and 12 NADPH` |
| Answer» Correct Answer - A | |
| 781. |
Calvin dark occure inA. ChloroplastsB. CytoplasmC. MitochondriaD. Glyoxysomes |
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Answer» Correct Answer - A Calvin cycle occurs in the stroma of chloroplasts where the products of light reaction (assimilatory power NADP.2H+ATP) are used to form `CO_(2)` to carbohydrate and it has enzymes essential for fixation of `CO_(2)` and synthesis of sugar. |
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| 782. |
Photosystem II occurs inA. StromaB. CytochromeC. Grana thylakoidsD. Mitochondrial surface |
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Answer» Correct Answer - C Photosystem II occurs in grana thylakoids. |
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| 783. |
which one is a `C_(4)`-plant ?A. papayaB. peaC. potatoD. Maize/corn |
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Answer» Correct Answer - D The plants in which the first stable product of dark raction of photosynthesis is a 4-carbon compound are called `C_(4)`-plants, e.g. sugarcane, maize, sorghum, etc. these plants show characteristic Kranz anatomy. The first `CO_(2)` acceptor in these plants is phosphoenol pyruvate (PEP). |
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| 784. |
In which of the following option correct words for all the three blanks A, B and C are indicated |
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Answer» Correct Answer - C A-Fixation of `CO_(2)` by `PEPCO` B-Decarboxylation C-Regeneration. |
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| 785. |
During photosynthesis when PGA is changed into phosphoglyceraldehyde, which of the following reaction occurA. OxidationB. ReductionC. ElectrolysisD. Hydrolysis |
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Answer» Correct Answer - B During photosynthesis PGA is reduced by NADP. 2H into phosphoglyceraldehyde. |
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| 786. |
Photosystem II occurs inA. stroma of chloroplasts and peroxisomesB. cytochromeC. granaD. mitochondrial surface |
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Answer» Correct Answer - C PS-II is present in appressed part of granal thylakoids. PS-I is present in stroma thylokoids and non-appressed parts of granal thylakoids. |
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| 787. |
The five carbon containg primary acceptor of `CO_2` in Calvin cycle isA. RuBPB. OAAC. PEAD. RuBisCO |
| Answer» Correct Answer - A | |
| 788. |
The initial enzyme of Calvin cycle isA. Ribulose 1,5-diphosphate carboxylaseB. Triose phosphate dehydragenaseC. Cytochrome oxidaseD. |
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Answer» Correct Answer - A Ribulose 1,5-diphosphate carboxylase enzyme is first enzyyme of calvin cycle convert ribulose-1,5 diphosphate into 3-phosphoglyceric acid. |
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| 789. |
Translocation of carbohydrate nutrients usually occurs in the form ofA. glucoseB. maltoseC. starchD. sucrose |
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Answer» Correct Answer - D In plants, translocation, i.e. the movement of organic nutrients from the region of supply to the region of sink or utilisation occurs through phloem (sieve tube/sieve cells) tissue. Translocated organic nutrients constitute 10-26% carbohydrates (usually sucrose) and 1% nitrogenous components (mostly amino acids). |
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| 790. |
The carbon dioxide acceptor in Calvin cycle/ `C_(3)`- plants isA. Phosphoenol Pyruvate (PEP)B. Ribulose 1,5-Diphosphate (RuDP)C. Phosphoglyceric acid (PGA)D. Ribulose monophosphate (RMP) |
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Answer» Correct Answer - B In `C_(3)`-plants , `CO_(2)` combines with ribuolose (acceptor molecule) in the presence of RuBisCO (RuBP carboxylase) and form two molecules of 3-phosphoglyceric acid or PGA (first stable product). |
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| 791. |
The initial enzyme of Calvin cycle isA. cytopchrome oxidaseB. photo-pertokinaseC. RuBP carboxylase/oxygenaseD. triose phosphate dehydrogenasse |
| Answer» Correct Answer - C | |
| 792. |
Chloroplast contains maximum quanitity ofA. hexaokinaseB. RuBisCO enzymeC. RuBPD. pyruvic carboxylase |
| Answer» Correct Answer - B | |
| 793. |
Formation of ATP in photosynthesis and respiration in an oxidation process which utilises the energy from:-A. cytochromesB. ferredoxinC. electronsD. carbon dioxide |
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Answer» Correct Answer - C Cytochromes (Keilin, 1925) are the electron transport intermediates containing heme (or related prosthetic groups) in which the iron undergoes valancey changes during electron transfer and produces energy (ATP) in both photosynthesis and respiration. |
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| 794. |
Formation of ATP in photosynthesis and respiration is an oxidation process which utilises the energy fromA. CytochromesB. FerridoxinC. ElectronsD. Carbon dioxide |
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Answer» Correct Answer - C Formation of ATP in photosynthesis and respiration is an oxidation process which utilities the energy from electrons. |
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| 795. |
Succelent performs `CO_(2)` fixation byA. CAM pathwayB. `C_(4)`pathwayC. `C_(3)`pathwayD. `C_(2)`pathway |
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Answer» Correct Answer - A Succulents perform `CO_(2)` fixation by CAM pathway. |
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| 796. |
Consider the following compounds:- 1. Phosphoenol pyruvate- 2. Malic acid- 3. Pyruvic acid- 4. Oxaloacetic acid- What is the correct sequence of these intermediate compounds as they form in `C_(4)` dicarboxylic acid pathway flowing the PEP-carboxylation reaction?A. 1,2,3,4B. 2,4,3,1C. 4,1,2,3D. 4,2,3,1 |
| Answer» Correct Answer - D | |
| 797. |
In presence of high concentration of oxygen. RuBP carboxylase converts RuBP toA. Malic acid and PEPB. PGA and PEPC. PGA and malic acidD. PGA and phosphoglycolate |
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Answer» Correct Answer - D In presence of high concentration of oxygen, carboxylase converte colate (this is photorespiration). |
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| 798. |
RuBP carboxylase is a less efficent enzyme for `CO_(2)` fixation in photosynthesis than PEP carboxylase because:A. RuBP is less predominant than PEP in a mesophyll cellB. RuBP is a 4-carbon sugar phosphate while PEP is a phosphorylated 3-carbon organic acid.C. Km value of RuBP carboxylase for `CO_(2)` is higher than that of PEP carboxylaseD. The molecular weight of RuBP carboxylase is larger than that of PEP carboxylase |
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Answer» Correct Answer - C RuBP carboxylase is a very slow enzyme, fixing only three molecules of its substrate every second and hence a large amount of this enzyme is needed by each plant. Typically, RuBP carboxylase accounts for 50% or so of the total protein in a chloroplast. |
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| 799. |
The enzyme RuBP carboxylaseA. Activity occurs in `C_(3) and C_(4)` plantsB. In present in inner thylakoid membraneC. Is low temperature sensitive enzymeD. Show greater affinity for `CO_(2)` |
| Answer» Correct Answer - A | |
| 800. |
In photorespiration, RuBP carboxylase combines with oxygen to yieldA. Two molecules of phosphoglycerateB. Two molecules of phosphoglycolateC. One molecule of phosphoglycerate and one molecule of phosphoglycolateD. Two molecule of glucose |
| Answer» Correct Answer - C | |