InterviewSolution
Saved Bookmarks
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.
| 1. |
The role of chlorophyll in photosynthesis isA. Absorption of `CO_(2)`B. Absorpiton of lightC. Absorption of light and photochemical decomposition of waterD. Absorption of water |
| Answer» Correct Answer - C | |
| 2. |
Chlorophyll is presentA. On the surface of chloroplastB. In the stroma of chloroplastC. In the grana of chloroplastD. Dispersed throughout the chloroplast |
| Answer» Correct Answer - C | |
| 3. |
Chlorophyll b isA. `C_(54) H_(70) O_(6) N_(4) Mg`B. `C_(55) H_(70) O_(6) N_(4) Mg`C. `C_(55) H_(72) O_(5) N_(4) Mg`D. `C_(45) H_(72) O_(5) N_(4) Mg` |
| Answer» Correct Answer - B | |
| 4. |
Chlorophyll a occurs inA. all photosynthetic autotrophsB. in all higher plantsC. all oxygen liberating autotrophsD. all plants except fungi |
| Answer» Correct Answer - C | |
| 5. |
Yellowish colour of autumn foliage is due to the presence of a type of xanthophyll pigment called asA. luteinB. lycopeneC. fucoxanthinD. zeaxanthin. |
|
Answer» Correct Answer - A Xanthophylls (=Carotenois) are oxygen containing derivatives of carotenes, e.g., `C_(40)H_(56)O` (cryptoxanthin), `C_(40)H_(56)O_(2)` (lutein, zeaxanthin) Yellowish colour of autumnal follage is due to lutein. The characteristic xanthophyll of brown algae is fucoxathin `(C_(40)H_(56)O_(6))` |
|
| 6. |
Which of the following concerns photophosphorylationA. `"AMP+Inorganic" PO_(4) overset("Light energy")to ATP`B. `"AMP+AMP" overset("Light energy")to ATP`C. `"ADP+Inorganic" PO_(4) overset("Light energy")to ATP`D. `"ADP+Inorganic" PO_(4) overset("Light energy")to ATP` |
| Answer» Correct Answer - C | |
| 7. |
85-90% of all photosythesis of the carried out by or The maximum evolution of oxygen is by greated produces of organic matterA. ShrubsB. HerbsC. Oceanic algae/ PhytoplanktonsD. Trees with large bracnces |
|
Answer» Correct Answer - C 90% of total photosynthesis is carried out by aquatic plants, chiefly algae (80% I oceans and 10% in fresh water). 10% of total photosynthesis is performed by land plants. |
|
| 8. |
Non-cyclic photophosphorylation producesA. `NAD^(+)`B. NADHC. NADPHD. `NADP^(+)` |
|
Answer» Correct Answer - C Non-cyclic photophosphorylation produces NADPH and ATP. |
|
| 9. |
Photorepiration producesA. sugar but not ATPB. ATP but no sugarC. Both ATP and sugarD. Neither ATP nor sugar |
|
Answer» Correct Answer - D Photorespiration produces neither ATP nor sugar. |
|
| 10. |
Study the following statements. (i) Red light falling in the ragne of wavelength 660-760nm is the most effective for photosynthesis. (ii) Green light falling in the range of wavelength 500-580 nm is the least effective for photosynthesis. (iii) Chl a,chl b carotenses and xanthophylls are soluble in organic solvents. (iv) Phycobilins (phycocyanin, allophycocynin and phycoerythrin) are soluble in water Which of the above statements is/are incorrect?A. ii and iiiB. iii and ivC. i onlyD. None of these |
| Answer» Correct Answer - D | |
| 11. |
The number of `P_(700)` molecules present in PS II comlex areA. oneB. twoC. threeD. none |
| Answer» Correct Answer - D | |
| 12. |
Dichlorophenyl Dimethyl Urea (DCMU) also called diuron, a potent herbicide stopsA. `O_2` evolutionB. non-cyclic photophosphorylationC. Both (a) and (b)D. oxididative photophosphorylation |
| Answer» Correct Answer - C | |
| 13. |
Consider the following:- 1. Cytochrome `b_(6)` -2. Cytochrome f- 3. Plastocyanin- 4. Plastoquinone- What is the correct sequence of these in the photo-induced electron carries between PS-II to PS-I in photosynthesis?A. 4,1,2,3B. 3,4,1,2C. 1,2,3,4D. 2,3,4,1 |
| Answer» Correct Answer - A | |
| 14. |
ATP as well as NADPH ` + H^(+)` both are required during the conversion of _______ in `C_(3) ` cycleA. RuBP + ` CO_(2) to 2 xx ` PGAB. `PGA to PGAL`C. `PGAL to DHAP`D. Fructose 1, 6 biphosphate ` to `Glucose |
| Answer» Correct Answer - B | |
| 15. |
Dobule carboxylation with spatial differnece is characteristic ofA. triticumB. pisumC. SaccharumD. Bryophyllum |
| Answer» Correct Answer - C | |
| 16. |
Regeneration of each RuBP in ` C_(3)` cycle requiresA. 1 ATPB. 6 ATPC. 1 ATP and 1 NADPH ` + H^(+)`D. 3 ATP and 2 NADPH ` + H^(+)` |
| Answer» Correct Answer - A | |
| 17. |
In ` C_(4)` plants, `CO_(2)` fixation is done byA. SclerenchymaB. Chlorenchyma and hypodermisC. Mesophyll cellsD. Guard cells |
| Answer» Correct Answer - C | |
| 18. |
Fixation and reduction of `CO_(2)` requiresA. ATPB. NADPH, cholrophyll, waterC. ATP,NADPHD. ATD,NADPH and light |
|
Answer» Correct Answer - C Fixation and reduction of `CO_(2)` (dark reaction) require ATP and NADPH. |
|
| 19. |
Regeneration step in `C_(3) ` cycle per ` Co_(2)` fixation requiresA. 1ATPB. 6 ATPC. 1NADPH ` + H^(+)` and 1 ATPD. 3 ATP and 2 NADPH ` + H^(+)` |
| Answer» Correct Answer - A | |
| 20. |
Photochemical reactions in the chloroplasts are directly involved in theA. formation of phosphoglyceric acidB. fixation of carbon dioxideC. synthesis of glucose and starchD. photolysis of water and phosphorylation of ADP to ATP |
|
Answer» Correct Answer - D `CO_(2)` is fixed in the stroma of the chloroplast leading to the synthesis of PGA from which glyceraldehyde phosphate is formed. From glyceraldehyde phosphate, sugar and starch are formed. All these do not require light. However, photolysis of water and phosphorylation of ADP to ATP requires light energy. |
|
| 21. |
how many turns of Calvin cycle yield one molecule of glucose?A. 8B. 2C. 6D. 4 |
|
Answer» Correct Answer - C Conversion of `CO_(2)` to simple (reduced) organic compounds is called `CO_(2)` assimilation or `CO_(2)` fixation or carbon fixation. This fixation pathway was elucidated in the early 1950s by Melvin calvin and Coworkens and is often called as calvin cycle. Since, one molecule of carbon is fixed in one turn of the calvin cycle. so, six turns of the cycle are required to fix the glucose molecules containing 6 carbon atoms. |
|
| 22. |
Fixation of one `CO_(2)` molecule through calvin cycle requiresA. 1 ATP and 2NADP`H_(2)`B. 2 ATP and `2NADPH_(2)`C. 3 ATP and `2NADPH_(2)`D. 2 ATP and `1NADPH_(2)` |
|
Answer» Correct Answer - C 2 ATP are required during conversion of PGA to 1,3 diphosphoglyceric acid and 1 ATP during conversion of glyceraldehyde phosphate to ribulose biphosphate. 2`NADPH_(2)` molecules are utilised for converting 1,3 diphosphoglyceric acid to glyceraldehyde phosphate. |
|
| 23. |
The first step in photosynthesis is theA. excitation of electron of chlorophyll by a photon of lightB. formation of ATPC. attachment of `CO_(2)` to 5 carbon sugarD. ionisation of water |
|
Answer» Correct Answer - A The entire process of photosynthesis is driven by light energy coming from the sun. this energy is first captured by chlorophyll molecules and later on utilised for the synthesis of ATP (chemical energy) molecules which are later utilised in the dark reaction, i.e., calvin cycle. |
|
| 24. |
The first step in photosynthesis is theA. Exciation of chlorophyll by lightB. lonsiation of waterC. ATP synthesisD. Production of assimilartory power |
| Answer» Correct Answer - A | |
| 25. |
The first step in the light reaction of photosynthesis isA. Formation of ATPB. Ionization of waterC. Attachment of `CO_(2)` to a pentose sugarD. Excitement of electron of chlorophyll by a photon of light. |
| Answer» Correct Answer - A | |
| 26. |
The first step for inition of photosynthesis will beA. Photolysis of waterB. Excitement of chlorophyll molecules due to absorpition of lightC. ATP formationD. Glucose formation |
| Answer» Correct Answer - B | |
| 27. |
The first step in photosynthesis is photolysis of waterA. Excitation of chlorophyll by lightB. IonizationC. ATP synthesisD. Production of assimilatory power |
| Answer» Correct Answer - A | |
| 28. |
the first step in photosynthesis is theA. Joining of 3-carbon atom to form GlucoseB. Formation of ATPC. Ionization of waterD. Excitement of an electron of chlorophyll by photon of light |
|
Answer» Correct Answer - D The first step in photosynthesis is the excitement of electron of chlorophyll by photon of light. |
|
| 29. |
The role of water in photosynthesis was experimentally confirmed byA. T.D.SaussureB. BarnesC. LiebigD. J.R.Mayer |
|
Answer» Correct Answer - A Hill demonstrated that `O_(2)` comes from `H_(2)O`. It was proved experimentally by Ruben and Kaman using labelled `O_(2)` as `H_(2)O""^(18)`. |
|
| 30. |
Diamorphic choroplasts are present inA. Sugracane `(C_(4))`B. CottonC. PeaD. Mango |
|
Answer» Correct Answer - A Sugarcane is `C_(4)` plant. The chloroplasts in `C_(4)` leaevs are dimorphic (two morphologically distinct types). The chloroplasts of bundle sheath cells contain starch grains but lack grana. The mesophyll cells on the other hand, contain normal type of chloroplasts. |
|
| 31. |
`C_(4)` plants can absorbs `CO_(2)` fromA. its much low concentrationB. much high concentrationC. carbonatesD. bicarbonates |
|
Answer» Correct Answer - A The enzyme PEP-carboxydismutase present in `C_(4)` plants is very sensitive to `CO_(2)` that is why `C_(4)` plants can absorb `CO_(2)` even from its much low concentration while the `C_(3)` plamts fail to avail it from such low concentration. |
|
| 32. |
Plants are know as purifiers for air due to process ofA. respirationB. photosynthesisC. transpirationD. desiccation |
| Answer» Correct Answer - B | |
| 33. |
Match the following and choose the correct combination form the options given A. A-1, B-3, C-4, D-5B. A-3, B-2, C-1,D-5C. A-4, B-3, C-2, D-1D. A-2,B-4, C-1, D-3 |
| Answer» Correct Answer - D | |
| 34. |
The full expansion of NADP isA. Nicotinamide adenime disphosphateB. Nicotinamide adenosime disphosphateC. Nicotinamide adenine dinucleotide phosphateD. Nicotinamide adenosine dinucleotide phosphate |
| Answer» Correct Answer - C | |
| 35. |
Plants are know as purificrse fo air due to process ofA. RespirationB. PhotosynthesisC. TranspirtionD. Desication |
|
Answer» Correct Answer - B Because `CO_(2)` is utilized in photosynthesis process by plants. |
|
| 36. |
Quantansomes are found inA. Surface of cristaeB. Surface of plasma membranceC. Surface of nuclear membraneD. Surface of thylakoids |
| Answer» Correct Answer - D | |
| 37. |
Assertion : Rhoeo leaves contain anthocynanin pigaments in epidermal cells. Reason : Anthocyanins are accessoryphotosynthetic pigments.A. If both the asserition and the reasion are true and the reason is a correct explanation of the assertionB. If both the assertion and reasoni s not a correct ecplanation of the assertionC. If the assertion is true but the reason is falseD. If both the asseertion and reason are false |
|
Answer» Correct Answer - C Anthocyanin pigment, present in cell sap of vacuole. It is responsible for the colouration of flower parts. It is not a photosynthetic pigment. |
|
| 38. |
Which one of the following contain agranal chloroplasts?A. `C_(3)` plantsB. SucculentsC. `C_(4)` plantsD. Hydrophytes |
|
Answer» Correct Answer - C `C_(4)` plants contain agranal chloroplasts. |
|
| 39. |
All life on earth derive its energy directly or indirectly from sun exceptA. Mushroom and mouldB. Chemosynthetic bacteriaC. Symbiotic bacteriaD. Pathogenic bacteria |
|
Answer» Correct Answer - B Chemosynthetic bacteria are able to manufacture all their organic food from inorganic raw material in the absence of light. `6CO_(2) + 24[H] overset("Enzymes/Energy")(to)C_(6)H_(12)O_(6) + 6H_(2)O` |
|
| 40. |
`NADPH_(2)` is generated in noncyclic photophosphorylation throughA. glycolysisB. photosystem IC. photosystem IID. anaerobic respiration |
|
Answer» Correct Answer - B Warburg effect is the reduction in photosynthesis in high conc. Of `O_(2)`. It is almost absent in `C(4)` plants. |
|
| 41. |
`CO_(2)` is formed all of the following exceptA. Buring of sugarB. Respiration in plantsC. Photosynthesis by plantsD. On heating of limestore |
|
Answer» Correct Answer - C Burning of sugar, respiration in plants and heating of limestone is responsible for the liberation of `CO_(2)` but in photosynthesis green plants take in `CO_(2)` and release `O_(2)` thus purifying the air. |
|
| 42. |
Quantansomes containA. 200 chlorophyll moleculesB. 230 chlorophyll moleculesC. 250 chlorophyll moleculesD. 300 chlorophyll molecules |
|
Answer» Correct Answer - B Park and Biggins (1964) gave the term quantasome for photosynthetic units is equivalent to 230 chlorophyll molecules. |
|
| 43. |
The plants of Cuscuta reflexa(Dodder) shows maximum photosynthesis inA. red lightB. blue lightC. green lightD. no photosynthesis at all |
|
Answer» Correct Answer - D Cuscuta is non green stem parasite. |
|
| 44. |
In photosynthesis , there isA. Reduction of `H_(2)O`B. Oxidation of `H_(2)O`C. Oxidation of `CO_(2)`D. Oxdiation of `NO_(2)` |
| Answer» Correct Answer - B | |
| 45. |
Cuscuta isA. Parasitic plantB. Symbiotic plantC. PredatorD. Decomposer |
| Answer» Correct Answer - A | |
| 46. |
In the process of photosynthesis,A. `O_(2)` is taken and `CO_(2)` is evolvedB. `O_(2)` is taken and `CO_(2)` in not evolvedC. `CO_(2)` is taken and `O_(2)` is evolvedD. `CO_(2)` is taken and `NO_(2)` is evolved |
| Answer» Correct Answer - C | |
| 47. |
Which one is `CU^(++)` containing pigmenttA. FeredoxinB. PlastocyaninC. PlastoquinoneD. Cytohchrome |
| Answer» Correct Answer - B | |
| 48. |
Which one of the following categories of organisms do not evolve oxygen during PhotosynthesisA. Photosynthetic red algaeB. Photsynthetic green aglaeC. Photosynthetic green algaeD. Photosynthetic bacteria |
| Answer» Correct Answer - D | |
| 49. |
Cu is present inA. PlasmalemmaB. PlastoquinoneC. PlastocyaninD. Ferredoxin |
| Answer» Correct Answer - C | |
| 50. |
During photosynthesisA. `O_(2)` evolved comes from `CO_(2)`B. ATP is formedC. ATP is not formedD. Water is required as medium but it does not take part in photosynthesis |
| Answer» Correct Answer - B | |