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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.
| 951. |
The first acceptor of `CO_(2)` in `C_(4)` plant isA. RuBpB. PEPC. OAAD. water |
| Answer» Correct Answer - B | |
| 952. |
In photosynthesis , for synthesis of one mole of glucose number of ATP and `NADPH_(2)` required isA. 10 and 20B. 18 and 12C. 8 and 6D. 12 and 15 |
| Answer» Correct Answer - B | |
| 953. |
How may ATP and `NADPH_(2)` are respectively produced in the process of photorespiration?A. 2 and 4B. 1 and 2C. 4 and 6D. 0 and 0 |
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Answer» Correct Answer - D Photorespiratory pathway (or `C_(2)` pathway) results in the release of `CO_(2)` with the utilisation of ATP. In the photorespirator pathway.there is no synthesis of ATP or NADPH. |
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| 954. |
Main difference between chlorophyll a and chlorophyll b isA. `-CH_(3)` of chlorophyll a is replaced by-CHO in chlorophyll bB. Chlorophyll a is linear while chlorophyll b is branchedC. Chlorophyll a has no MgD. All of the above |
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Answer» Correct Answer - A Main difference between chlorophyll a and chlorophyll b is `-CH_(3)` of chlorophyll a is replaced by `-CHO` in chlorophyll b. |
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| 955. |
Photophosphorylation is the process in whichA. `CO_(2) and `O_(2)` uniteB. Phosphoglyceric acid is producedC. Aspartic acid is formedD. Light energy is converted into chemical energy through production of ATP |
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Answer» Correct Answer - D Photophosphorylation is the process in which light energy is converted into chemical energy through production of ATP. |
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| 956. |
During fixation of one molecule of `CO_(2)` by `C_(3)` plants, number of ATP and NADPH_(2)` required areA. 3ATP and 2`NADPH_(2)`B. 5ATP and `NADPH_(2)`C. 12 ATP and `12 NADPH_(2)`D. 2ATP and 3 `NADPH_(2)` |
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Answer» Correct Answer - A For every `C_(2)` molecule entering the Calvin cycle 3 molecules of ATP and 2 molecules odf NADPH are required. To make one molecule of glucose, 6 turns of the cycles are requried (6xx2ATP=18ATP and 6xx2 NADPH=12NADPH). |
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| 957. |
In Hatch and Slack pathwayA. Chloroplast are of same typeB. Occurs in Kranz anatomy where mesophyll have small chloroplast wheres bundle sheath have agranal chloroplastC. Occurs in Kranz anatomy when mesophyll have small chloroplast where a bundle sheath have larger chloroplastD. Kranz anatomy where mesophyll cell are diffused |
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Answer» Correct Answer - B Bundle sheath chloroplast larger in size, lack grana (Agranal chloroplast) and contain starch grains. Mesophyll chloroplast small in size, contain grana and lack starch grains. |
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| 958. |
`C_(4)` plants are more expensive in terms of ATP required for `CO_(2)` fixation, the additional number of ATP required by `C_(4)` plants in comparison to `C_(3)` plants isA. `6 ATP`B. `12 ATP`C. `18 ATP`D. `24 ATP` |
| Answer» Correct Answer - B | |
| 959. |
In Hatch and Slack pathwayA. has chloroplasts of same typeB. occurs in Kranz anatomy where mesophyll cells have small granal chloroplast and bundle sheath cells have agranal chloroplastC. occurs in Kranz anatomy when mesophyll have small chloroplast whereas bundle sheath have larger granal chloroplastsD. occurs in Kranz anatomy where mesophyll cells are diffused |
| Answer» Correct Answer - B | |
| 960. |
Which one of the following does not play any role in photosynthesisA. PhycocyaninB. PhycnerythrinC. AnthocyaninD. Xanthophyll |
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Answer» Correct Answer - C Anthocyanin does not play any role in photosynthesis. |
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| 961. |
Which of the following may show photosynthesis in moonlightA. Some thermal algaeB. Some marine algaeC. Some fresh water algaeD. None of these |
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Answer» Correct Answer - B Normally plants utilize sunlight but marine algae also use moon light, photosynthesis even occur in electric light. |
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| 962. |
In this process which of the following play important roleA. Chlorophyll aB. Light energyC. `Ca^(++),Mn^(++),Cl^(-)`D. All of the above |
| Answer» Correct Answer - D | |
| 963. |
`C_(4)` Plants belong toA. GramineaeB. MonocotsC. DicotsD. Both monocots and dicots |
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Answer» Correct Answer - D `C_(4)` plants belong to monocots and dicots. |
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| 964. |
3-PGA is first stable product ofA. Carbon oxidation cycleB. Carbon reduction cycleC. Reductive aminationD. Malic acid synthesis |
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Answer» Correct Answer - B 3-PGA is first stable product of carbon reduction cycle/`C_(3)` cycle. |
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| 965. |
As compared to a `C_(3)` plant, how many additional molecules of ATP are needed for net production of one molecule hexose sugar by `C_(4)` plantsA. TwoB. SixC. TwelveD. Zero |
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Answer» Correct Answer - C As compared to `C_(3)` plants, twelve additional molecules of ATP are needed for net production of one molecule of hexose sugar by `C_(4)` plants. |
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| 966. |
As compared to a `C_(3)` plant, how many additional molecules of ATP are needed for net production of one molecule hexose sugar by `C_(4)` plantsA. TwoB. SxC. ZeroD. Twelve |
| Answer» Correct Answer - D | |
| 967. |
As compared to a `C_(3)` plant, how many additional molecules of ATP are needed for net production of one molecule hexose sugar by `C_(4)` plantsA. 2B. 6C. 12D. zero |
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Answer» Correct Answer - C In `C_(4)`- plants every `CO_(2)` molecule as to be fixed twice, so these plants are needed more energy for ` C_(3)`-plants in which ` CO_(2)` has to be fixed only once. 18 ATP molecules are required by `C_(3)`-plants for the synthesis of one molecule of hyexose sugar while 30 ATP molecules are needed by the `C_(4)`-plants for the same. thus, `C_(4)`-plants have a need of 12 ATP molecules extra than `C_(3)`-plants for the synthesis of one molecule of hexose sugar. |
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| 968. |
Isotope of oxygen used in studying photolysis isA. `""^(16)O`B. `""^(15)O`C. `""^(17)O`D. `""^(8)O` |
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Answer» Correct Answer - D Isotope of oxygen used in studying photolysis is `.^(18)O`. |
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| 969. |
As compared to a `C_(3)` plant, how many additional molecules of ATP are needed for net production of one molecule hexose sugar by `C_(4)` plantsA. 2B. 6C. 0D. 12 |
| Answer» Correct Answer - D | |
| 970. |
How many Calvin cycle form one hexose moleculeA. 2B. 6C. 4D. 8 |
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Answer» Correct Answer - B As calvin cycle takes only one carbon (as `CO_(2)`) at a time. So it takes six turns of the cycle to produce a net gain of one hexose or glucose. |
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| 971. |
Assertion: The first product of `CO_(2)` fixation in `C_(3)` pathway is OA A. Reason: The first product of `CO_(2)` fixation in `C_(4)` pathway is PGA. |
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Answer» Correct Answer - D The first product of `CO_(2)` fixation in `C_(3)` pathway is 3-phosphoglyceric acid (PGA) which is a 3-carbon compound while the first product of `CO_(2)` fixation in `C_(4)` pathway is oxaloacetic acid (OA A) which is a 4-carbon compound. |
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| 972. |
Select the incorrect statement as far as kranz anatomy is concerned.A. Undifferentiated mesophyll occurs in concentric layers around vascular bundles.B. Centrifugal chloroplasta are present in bundle sheath cells.C. Large sized bundle sheath cells are arranged in a wreath-like manner in one to several layers.D. Chloroplasts of bundle sheath cells possess welldeveloped grana lamellae. |
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Answer» Correct Answer - D Kranz anatomy is a characteristic of `C_(4)` plants, In kranz anatomy, the mesophyll is undifferentiated and its cells occur in concentric layers around vascular bundles. Vascular bundles are surrounded by large sized bundle sheath cells which are arranged in a wreath-like manner in one to several layers. The chloroplasts of mesophyll cells are smaller, they have well developed grana and a peripheral reticulum but no strach. |
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| 973. |
In chorophyll, structure four pyrrole ring are united with Mg by their atoms ofA. CB. HC. OD. N |
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Answer» Correct Answer - D In chlorophyll, four pyrrole rings are attached to Mg by their N atoms. |
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| 974. |
In chorophy,l striucture four pyrrole ring are united with Mg by their atoms ofA. NB. CC. HD. O |
| Answer» Correct Answer - A | |
| 975. |
The first experiment on photosynthesis in flashing light were carried out byA. F.F. BalackmanB. Robert Emerson and ArnoldC. Melvin CalvinD. Robert Hill |
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Answer» Correct Answer - B Emerson and arnol proved the existence of light and dark reaction by flashing of light experiment in photosynthesis. |
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| 976. |
The reaction centre for PS-I and PS-II areA. `P_(700)` and `P_(680)` respectivelyB. `P_(680)` and `P_(700)` respectivelyC. `P_(580)` and `P_(700)` respectivelyD. `P_(700)` and `P_(580)` respectively |
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Answer» Correct Answer - A The reaction centers of PS-I and PS-II can be denoted as `P_(700^(+)) and P_(680^(+))` respectively. Positively charged. Reactio centers act as attractants for electrons. |
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| 977. |
Reaction centre of PS I is ____ and reaction centre of PS II is___A. `P_(700)`B. `P_(680)`C. `Ch_(715)`D. `Chl_(685)` |
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Answer» Correct Answer - A Reaction centre of PS I is `P_(700-)` |
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| 978. |
In which plant Calcin experiment by radiuo active isotopy to discover the stable product of `C_(3)` cycleA. ChlorellaB. CycaC. CarrotD. Tabacco |
| Answer» Correct Answer - A | |
| 979. |
Which is related to light reaction of photosynthesis?A. In PS II light reaction centre is `P_(700)`B. In PS I light reaction centre is `P_(680)`C. Photolysis is associated with PS ID. PS I and PS II are associated in Z-scheme. |
| Answer» Correct Answer - D | |
| 980. |
The creation of proton geadient across the thyakoid membrane is a result ofA. Decrease in proton number in stromaB. Decrease in pH in the lumenC. Accumulation of protons in the lumenD. All of the above |
| Answer» Correct Answer - D | |
| 981. |
Photorespiration is affected byA. TemperatureB. Light intensityC. `CO_(2)` and `O_(2)`D. All of the above |
| Answer» Correct Answer - D | |
| 982. |
Which is not related to photorespirationA. LysosomeB. ChloroplastC. PeroxisomeD. mitochondria |
| Answer» Correct Answer - A | |
| 983. |
`C_40H_56` is the empirical formula ofA. chlorophyll -bB. carotenseC. anthocyaninD. xanthophyll |
| Answer» Correct Answer - B | |
| 984. |
`C_40H_56` is the empirical formula ofA. xanthophyllB. anthocyaninC. chlorophyllD. xanthophyll |
| Answer» Correct Answer - A | |
| 985. |
The empirical equation representing the total process of photosynthesis for oxygen evolving oxygen was given byA. `6CO_(2)+12H_(2)Ooverset("Light")toC_(6)H_(12)O_(6)+6HO_(2)+6O_(2)`B. `6CO_(2)+6H_(2)Ooverset("Light")toC_(6)H_(12)O_(6)+6O_(2)`C. `CO_(2)+H_(2)Ooverset("Light")to[CH_(2)O]+O_(2)`D. `C_(6)H_(12)O_(6)+6O_(2)to6CO_(2)+6H_(2)O` |
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Answer» Correct Answer - C The empirical equation representing the total process of photosynthesis for oxygen evolving organisms was given by `CO_(2)+H_(2) overset("Light")to [CH_(2)O]+O_(2)` |
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| 986. |
Fill in the blanks Light saturation ocuurs at ….a…per cent of full sunlight. 2. There is a….b…. Relationship between incident light and `CO_(2)` fixation rates at low light intensities. 3. `C_(3)` plants show saturation at about …c…`mulL^(-1)` while `C_(4)` corresponds to saturation at about ....d....`mulL^(-1)`A. a-2-5%, b-sigmoid, c- 350, d-460B. a-50%, b-linear, c-460, d- 350C. a-10%, b-sigmoid, c- 360, d-450D. a-10%, b-linear, c-450, d- 360 |
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Answer» Correct Answer - D 1. Light saturation occurs at 10% per cent of full sunlight. 2. There is a linear relationship between incident light and `CO_(2)` fixation rates at low light intensities. 3.`C_(3)` plants show saturation at about `450mu1 L^(-1)` while `C_(4)` corresponds to saturation at about `360mu1 L^(-1)`. |
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| 987. |
Write the concentration of `CO_(2)` at which `C_(3) and C_(4)` plants shows saturation respectively. |
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Answer» Correct Answer - `C_(3)=450mulL^(-1)` `C_(4)=360mulL^(-1)` |
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| 988. |
Sorghum and sugarcane plants show saturation at aboutA. 50% of full sunlightB. 10% of full sunlightC. 360 ppm of ` CO_(2)`D. 500 ppm of ` CO_(2)` |
| Answer» Correct Answer - C | |
| 989. |
Plants show light saturation effect at _______ of full sunlightA. 0.1B. 0.5C. 0.7D. 1 |
| Answer» Correct Answer - A | |
| 990. |
The ` CO_(2)` concetration at which `C_(4)` plants show saturation is aboutA. 360 ppmB. 380 ppmC. 450 ppmD. 500 ppm |
| Answer» Correct Answer - A | |
| 991. |
Assertion: The color of the leaf is due to the presence of four pigments-chlorophyll a, chlorophyll b, xanthopylls and carotenoids. Reason: Chlorophyll b is the chief pigment associated with phosynthesis |
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Answer» Correct Answer - C Chlorophyll a is found in all photosynthetic plants except bacteria. Hence, it is termed as universal photosynthetic pigment. It is alos called primary photsynthetic pigment because it performs primary reaction of photosynthesis which involves covnertsion of light into chemical energy |
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| 992. |
Choose the correct statementA. Chlorophyll-a is solube in petroleum ether and shows maximum absorption peak at 453 nm and 642 nm.B. In chlorophyll-b, `-CH_(3)` replaces`-CHO` at 3-C of chlorophyll -aC. Chorophyll-b is soluble in methyl alochol and shows maximum absorption peak in 429 nm and 660 nm.D. For the biosynthesis of chlorophyll, raw materials required are succinyl Co-A and glycine. |
| Answer» Correct Answer - B | |
| 993. |
Action spectrum of photosyntheic pigments was studied by Englemann on _______ in the presence of _______ bacteriaA. Spirogyra , AnaerobicB. Cladphora , AerobicC. Chlorella , AerobicD. Scenedesmus, Anaerobic |
| Answer» Correct Answer - B | |
| 994. |
A quantasome consists of 230 chlorophyll molecules and acts as a photosyntheic unit. It was discovered byA. Park and BigginsB. Hatch and SlackC. Pelletier dn CaventouD. Blackman |
| Answer» Correct Answer - A | |
| 995. |
the number of chlorophyll molecules in a quantasome id |
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Answer» Correct Answer - B The number of chlorophyll molecules in a quanta some is 200-250 (about 230). |
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| 996. |
Experiment to prove essentiality of `CO_2` forA. Van MollB. Calvin et al.C. ArnonD. R hill |
| Answer» Correct Answer - B | |
| 997. |
Select the incorrect pair.A. 2-carbon compound-Aspartic acidB. 3-carbon compound-PGAC. 4-carbon compound-Malic acidD. 5-carbon compound-RuBP |
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Answer» Correct Answer - A Both malic acid and asparic acid are 4-carbon compounds formed in the mesophyll cells during `C_(4)` cycle. PGA (3-phosphoglyceric acid) is a 3-carbon compound, which is the first stable product of Calvin cycle (`C_(3)`cycle). RuBP (Ribulose-1,5-biphosphate) is a 5-carbon compound, which is the primary acceptor of `CO_(2)` during `C_(3)` cycle. |
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| 998. |
Alage used by Calvin and associates for photosynthetic reserch is or The experimental material that has largely been responsible for the making rapiad advances in research on photosynthesis is or Warbug studied his effect on .A. ChlorellaB. ChlamydomonasC. VolvoxD. All the above |
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Answer» Correct Answer - A Calvin used isotopes `C^(14)` in chlorella for knowing carbon path in photosynthesis. Chlorella for knowing carbon path in photosynthesis. Chlorella is a unicellular alga is using by ruben kamen and warburg. Bacause algae carry out 90% of photosynthesis. |
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| 999. |
Why do the `C_(4)` plants show better yield and high productivity than ` C_(3) ` plants ? |
| Answer» The `C_(4)` plants have evolved a mechanism to avoid photorespiration which may otherwise lead to 25 precent loss of `Co_(2)` fixes. These plants have a mechanism that increases the concentration of ` CO_(2)` at the RuBisCO site and thus minimising the oxygenase activity of the enzyme. | |
| 1000. |
The head and tail of chlorophyll are made up ofA. porphyrin and phytinB. pyrrol and tetrapyrrolC. porphyrin and phytolD. tetraphyrrol and pyrrol |
| Answer» Correct Answer - C | |