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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.
| 351. |
Who demonstrated that photosynthesis is essentially a light dependent reaction in which hydrogen from a suitable oxidisabie compound reduces carbon dioxide to carbohydrates·?A. Julius von SachsB. Cornelius van NielC. T .W. EngelmannD. Jan lngenhousz |
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Answer» Correct Answer - B Cornelius van Neil demonstrated that photosynthesis is essentially a light dependent reaction in which hydrogen from a suitable oxidisable compound reduces carbon dioxide to carbohydrates. |
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| 352. |
Usually the process of photosynthesis is :A. Slower than respirationB. Faster than respirationC. Equal to respirationD. Any of the above is possible |
| Answer» Correct Answer - B | |
| 353. |
Of the total amount of water absobed by the plants, its actual percentage used during photosynthesis isA. `50%`B. `90%`C. `1%`D. `25%` |
| Answer» Correct Answer - C | |
| 354. |
Carbohydrates are commonly found as starch in plant storage organs. Which of the following five properties of starch (A-E) make it useful as a storage material (A) Easily translocated (B) Chemically non-reactive (C) Easily digested by animals (D) Osmotically inactive (E) Synthesized during photosynthesis The useful proeprties ar :A. B and CB. B and DC. A,C and ED. A and E |
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Answer» Correct Answer - C Option (c) is correct. As starch is a high molecular weight polymer of D-glucose is `alpha1to4` linkage. It is synthesised in chloroplasts as one of the stable end products of photosynthesis. It is most abundant and common storage polysacharide in plants hence, most staple food for man and herbivores. It is a mixture of two types of glucose homopolysaccharide viz, amylose and amylopectin. During day time the starch synthesis in chloroplst is coordinated with sucrose synthesis in cytose Typically about 90% of total solute carried in phloem is the carbohydrate sucrose, a disaccharide. this is relatively inactive and highly soluble sugar playing little direct role in metabolism and so, making an ideal transport sugar. |
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| 355. |
Photosynthetic enhancement with flashing light was first observed byA. Benson and CalvinB. Hill and CalvinC. Hatch and SlackD. Emerson and Arnold |
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Answer» Correct Answer - D Photosynthetic enhancement with flashing light was first observed by Emerson and Arnold. |
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| 356. |
Assertion : Red light of visible spectrum contains high energy. Reason : Green light of visible spectrum contains low energy than red light.A. Both Assertion and Reason are true and Reason is the correct explanation of AsserationB. Both Assertion and Reason are true, but Reason is not the correct explanation of AssertionC. Assertion is true , but Reason is falseD. Both Assertion and Reason are false |
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Answer» Correct Answer - D Energy is opposite to the wavelength of visible light . So, red light of visible spectrum contains low energy , while blue light contains hight energy , Due to this reason , absorption of blue lgiht excites the chlorophyll molecules to a high energy state than the absorption of red light. |
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| 357. |
Photosynthesis process was first discovered byA. PriestleyB. Ingen HouszC. EnglemanD. Blackman |
| Answer» Correct Answer - B | |
| 358. |
A tadpole like configuration is found inA. ChlorophyllB. CarotenoidsC. PhycobilinsD. Anthocyanin |
| Answer» Correct Answer - A | |
| 359. |
Assertion : Carotenoids are accessory pigments. Reason : Absorbed light energy is transferred to reaction centre by carotenoids.A. Both Assertion and Reason are true and Reason is the correct explanation of AsserationB. Both Assertion and Reason are true, but Reason is not the correct explanation of AssertionC. Assertion is true , but Reason is falseD. Assertion is false, but Reson is true |
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Answer» Correct Answer - A Carotenoids are inergal constituents of the thylakoid membrane and are found in all photosynthetic organisms . They absorb light energy in the mid region of visible spectrum. These are known as accessory pigments, because the light absorbed by them is transferred to chlorophyll for photosynthesis. |
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| 360. |
Linear relationship exists between incident light and rate of ` CO_(2)` fixation at/in.A. High light intensityB. Low light intensityC. Dense forestsD. More than one option is correct |
| Answer» Correct Answer - D | |
| 361. |
Which one of the following is not a limiting factor for photosynthesisA. ChlorophyllB. LightC. Carbon dioxideD. Temperature. |
| Answer» Correct Answer - B | |
| 362. |
Visible part of electromagnetic spectrun consists of radiations having a wavelength in the range ofA. 400-800nmB. 300-2600nmC. 390-760 nmD. 650-760nm |
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Answer» Correct Answer - C Light is the visible part of electomagnetic radiations. Visible light consists of radiations having a wavelength between 390-760 nm (or 399-430nm), blue of indigo (430-470nm), blue green or blue (470-500nm), green (500-580nm), yellow (580-600nm), orange (600-650nm), orange red (650-600nm) and red (660-760nm). |
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| 363. |
ATP formation in photosynthesis is known asA. photophosphorylationB. phosphorylationC. oxidative phosphorylationD. None of the above |
| Answer» Correct Answer - A | |
| 364. |
ATP formation in photosynthesis is known asA. PhosphorylationB. PhotophosphorylationC. Oxidative phosphoruylationD. None of the above |
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Answer» Correct Answer - B Duringlight reaction not only reduced NADP is formed and `O_(2)` is evolved but ATP is also formed. This formation of high energy phosphates (ATP) is dependent on light hence called photophosphorylation. |
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| 365. |
The `C_(3)` plants show ` CO_(2)` satrurationA. At about `360 muL^(-1)`B. Only below ` 450 muL^(-1)`C. Only beyond `540 muL^(-1)`D. only beyond ` 450muL^(-1)` |
| Answer» Correct Answer - D | |
| 366. |
`CO_(2)` concentrating steps are found inA. RiceB. sugarcaneC. WheatD. Tomato |
| Answer» Correct Answer - B | |
| 367. |
First of all who demosntrate that sunlight is essential for photosynthesis in plants. |
| Answer» Correct Answer - Jan Ingenhousz | |
| 368. |
Pigment system-II is concerned withA. reduction of `CO_(2)`B. floweringC. photolysis of waterD. none |
| Answer» Correct Answer - C | |
| 369. |
For which plants light is a limiting factor |
| Answer» Correct Answer - Plant in shade | |
| 370. |
Among light and dark reaction which reaction is more temperature affected? |
| Answer» Correct Answer - Dark reaction (more enzymatic) | |
| 371. |
Peroxysomes are related withA. PhotsynthesisB. PhotorespirationC. RespiartionD. None |
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Answer» Correct Answer - B The process of photorespiration involves the involvement of chloroplast, peroxysome and mitochondria. |
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| 372. |
`ATP` formation during photosynthesis isA. PhosphoryationB. PhotophosphorylationC. Oxidative phosphorylationD. None of the above |
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Answer» Correct Answer - B ATP formation during photosynthesis is photophosphorylation. |
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| 373. |
Peroxysomes are found inA. Bundle sheathB. EndospermC. Mesophyll cellsD. Vascular bundle |
| Answer» Correct Answer - C | |
| 374. |
Photosynthesis in `C_(4)` plants is relatively less limited by atmospheric `CO_(2)` levels becauseA. Effective pumping of `CO_(2)` into bundle sheath cellsB. RuBisCO in `C_(4)` plants has higher affinity for `CO_(2)`C. Four carbon acids are primary initial `CO_(2)` fixation productsD. Primary fixation of `CO_(2)` is mediated via PEP carboxylase |
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Answer» Correct Answer - D Photosynthesis in `C_(4)` plants is relatively less limited by atmospheric `CO_(2)` because primary fixation of `CO_(2)` is mediated via PEP carboxylase |
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| 375. |
the empirical formula for chlorophyll a isA. `C_(35) H_(72) O_(5) N_(4) Mg`B. `C_(65) H_(70) O_(6) N_(4) Mg`C. `C_(55) H_(72) O_(5) N_(4) Mg`D. `C_(45) H_(70) O_(6) N_(4) Mg` |
| Answer» Correct Answer - C | |
| 376. |
In photorespiration glycolate is converted to `CO_(2)` and serine inA. ChloroplastsB. PeroxisomesC. VacuolesD. Mitochondria |
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Answer» Correct Answer - D Glyoxylate is used to form glycin, glycine enters in mitochondria where two glycine molecules gives rise to one molecule of serine and one `CO_(2)`. |
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| 377. |
Which of the followig is `C_(4)` plant ?A. sugarcaneB. MangoC. AppleD. Tomato |
| Answer» Correct Answer - A | |
| 378. |
Which are related with photorespiration ?A. SpherosomeB. LysosomesC. GlyoxysomesD. Peroxisomes |
| Answer» Correct Answer - D | |
| 379. |
Photorespiration is characteristic ofA. CAM plantsB. `C_(3)` plantsC. `C_(4)` plantsD. None of the above |
| Answer» Correct Answer - A | |
| 380. |
In `C_(3)` plants, photosynthesis occur inA. Bundle sheath cellsB. PeroxisomerC. Mesophyll cellsD. Kranz anatomy |
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Answer» Correct Answer - C In `C_(3)` plants photosynthesis occurs in mesophyll cells. |
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| 381. |
`C_(4)` photosynthesis does not occur inA. Zea mayB. Saccharum munjaC. Saccharum officinarumD. Euphorbia splenders |
| Answer» Correct Answer - B | |
| 382. |
A few normal seedlingd of tomato were kept in a dark room. After a few days were found to have become white coloured like albinos. Ehich of the following terms will you use to describe themA. DefoliatedB. MutatedC. EnbolisedD. Etiolated |
| Answer» Correct Answer - D | |
| 383. |
Phytochrome isA. LipoproteinB. ChromoproteinC. FlavoproteinD. Glycoprotein |
| Answer» Correct Answer - B | |
| 384. |
In `C_(3)` plants, photosynthesis occur inA. Bundles sheath cellsB. PeroxisomeC. Mesophyll cellsD. Kranz antomy |
| Answer» Correct Answer - C | |
| 385. |
In case of ` C_4` - plants , whcih enzyme fixes the `CO_2` released during decarboxylation of malateA. RuBisCOB. MDHC. PEPaseD. None of these |
| Answer» Correct Answer - A | |
| 386. |
Photophosphorylation is a process in whichA. light energy is converted into chemical energy by production of ATPB. glutamic acid is formedC. 2 PGA is formedD. None of above |
| Answer» Correct Answer - A | |
| 387. |
The evidence that during photosynthesis oxygen comes from water isA. photosynthesis bacteria employ `H_(2)S` and `CO_(2)` to form carbohydrates, water and sulphurB. isolated illuminated chloroplasts release oxygen if provided with potassium ferrocyanideC. isotopic `""^(18)O` provided as `H_(2)""^(18)O`appears as`""^(18)O_(2)` liberated in photosynthesisD. all the above |
| Answer» Correct Answer - D | |
| 388. |
Who provided the evidence that glucose is formed during photosynthesis and is then stored in the form of starchgt?A. SachsB. EngelmannC. van NielD. Blackmann |
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Answer» Correct Answer - A Sachs (1854) provided the evidence that green plant parts produce glucose which is stored in the form of starch. Starch is the first visible product of photosynthesis. |
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| 389. |
In which stage of photosynthesis ,light is directy necessaryA. For electron exitaionB. For reducation of `CO_(2)`C. For regulating photosystemD. For cyclic photophosphorylation |
| Answer» Correct Answer - A | |
| 390. |
Minimum photosythesis takes place inA. Green lightB. red lightC. Blue lightD. White light |
| Answer» Correct Answer - D | |
| 391. |
Photorespiration take place isA. Chloroplast,mitochondriaB. Mitochondria, peroxysomeC. Chloroplasts, peroxysome, mitochondriaD. Chloroplasts, cytoplasm, mitochondria |
| Answer» Correct Answer - C | |
| 392. |
Intact choloroplast from green leaves can be isolated byA. AcetoneB. EthanolC. AlcohalD. Sugar solution |
| Answer» Correct Answer - A | |
| 393. |
Leaves are green because theyA. Absorb green lightB. Do not absorb but reflect green lightC. Utilise green lightD. Absorb and reflect green light |
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Answer» Correct Answer - B Leaves are green because they do not absorb but refleet green light. |
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| 394. |
Pigment acting as a reaction centre during photosynthesis isA. CaroteneB. PhytochromeC. `P_(700)`D. Cytochrome |
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Answer» Correct Answer - C Pigment acting as a reaction centre during photosynthesis `P_(700) and P_(680)` |
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| 395. |
Which one is false about kranz anatomyA. Bundle sheath have large chloroplast and less developed granaB. Mesophyll cells have large chloroplast and moreC. It is found in Atriplex, sugarcane, maizeD. Plant having it have better photosynthesizing power than `C_(3)` plants |
| Answer» Correct Answer - B | |
| 396. |
Who discovered that `CO_(2)` is taken in and `O_(2)` is released by green plants ?A. MeyerB. Ijugen HouszC. SenebierD. Priestly |
| Answer» Correct Answer - D | |
| 397. |
Which one is false about kranz anatomyA. Bundle sheath cells have large chloroplast and less developed grana.B. Mesophyll cells have large chloroplast and more developed grana.C. It is found in Atriplex, sugarcane, and maize.D. Plants having it have better photosynthesizing power than `C_(3)` plants. |
| Answer» Correct Answer - B | |
| 398. |
Which of the following photosynthetic inhibitor group damages PS-I ?A. CMUB. ParaquatC. AtrizineD. All of these |
| Answer» Correct Answer - D | |
| 399. |
Name the scientist who discovered dark reaction in 1905.A. BlackmanB. Van NeilC. Melvin CalvinD. Engel man |
| Answer» Correct Answer - A | |
| 400. |
The fluid containing proteinaceous matrix of chloroplast isA. thylakoidsB. cytosolC. cytoplasmD. stroma |
| Answer» Correct Answer - D | |