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the condition(s) under which cyclic ph...

the condition(s) under which cyclic photophosphorylation occurs is/are a. light of wavelength beyond 680 nm b. anaerobic conditions c. poor `CO_2` availability

A

all a, b & c

B

only a & b

C

only a

D

only b & c

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Cyclic photophosphorylation occurs when only light of wavelengths _______ are available. (i) Below 680 nm (ii) Beyond 680 nm (iii) 400 nm and below (iv) Beyond 400 nm

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A physicist wishes to eject electrons by shining light on a metal surface. The light source emits light of wavelength of 450 nm. The table lists the only available metals and their work functions. {:("Metal",W_(0)(eV)),("Barium",2.5),("Lithium",2.3),("Tantalum",4.2),("Tungsten",4.5):} Which metal(s) can be used to produce electrons by the photoelectric effect from given source of light?

Which of the following statement is / are incorrect ? (i) Green light falling in the range of wavelength 500 -580 nm is least effective for photosynthesis. (ii) In non - cyclic photophosphorylation, the electron expelled from the reaction centre is not cycled back , though its loos is compensated by electrons from the photolysis of water . (iii) Chl a , Chl b , carotenoids , and xanthophylls are insoluble in organic solvents. (iv) 400-700 nm light is used in photosynthesis also known as PAR. (v) Red light is the most effective for photosynthesis.

A certain day absorbs lights of lamda=400 nm and then fluorescence light of wavelength 500 mn. Assuming that under given condition 40% of the absorbed energy is re-emitted as fluorescence, calculate the ratio of quanta obserbed to number of quanta emitted out.

Which statement about photosynthesis are correct (a) First CO_(2) acceptor in C_(4) cycle is PGA (b) In C_(3) plants, first stable product of photosynthesis is RuBP (c) Cyclic photophosphorylation results in formation of ATP (d) Oxygen liberated during photosynthesis comes from water

A gas cylinder can hold 1 kg of hydrogen at room temperature and pressure : What weight of CO_2 can the cylinder hold under similar conditions of temperature and pressure ? (H=1, C = 12, O=16)

A pigment appears yellow-orange in the chromatogram and found in leaves of higher plants, helps (a) In absorption of light of different wavelength (b) To prevent oxidative destruction of chlorophyll pigment by light. (c) By absorbing wavelengths beyond visible spectrum which increases the efficiency of photosynthesis.

Answer the following: (a) In Young's double slit experiment, derive the condition for (i) constructive interference and (ii) destructive interference at a point on the screen. (b) A beam of light consisting of two wavelengths, 800 nm and 600 nm is used to obtain the interference fringes in a Young's double slit experiment on a screen placed 1.4 m away. If the two slits are separated by 0.28 mm, calculate the least distance from the central bright maximum where the bright fringes of the two wavelengths coincide.

What amount of energy sould be added to an electron to reduce its de Broglie wavelength lamda_1=550nm incident on it, causing the ejection of photoelectrons for which the stopping potential is V_(s1)=0.19V . If the radiation of wavelength lamda_2=190nm is now incident on the surface, (a) calculate the stopping potential V_(S2) , (b) the work function of the surface, and (c) the threshold frequency for the surface.

AAKASH INSTITUTE ENGLISH-TEST 5-EXAMPLE
  1. A pigment appears yellow-orange in the chromatogram and found in leave...

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  2. which of the given statements are true regarding PS I and PS II? a. bo...

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  3. the condition(s) under which cyclic photophosphorylation occurs is/a...

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  4. Synthesis of ATP by enzymes present on thylakoids does not involve (a...

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  5. which of the given is not a component of assimilatory power for dark...

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  6. choose the odd one w. r. t. the steps of Calvin cycle

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  7. The C4 pathway of CO2 fixation is an adaptation of plants found mainly...

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  8. the dual activity of RuBisCO is found in

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  9. read the following statements and state them as true (T) or false (F...

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  10. the most abundant enzyme of the world is related to all, except

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  11. For every CO2 molecule entering the kelvin cycle how many ATP and NADP...

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  12. Make the incorrect statement for kelvin cycle

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  13. Plants showing C4 pathway are better than the C3 plants in

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  14. Bundle sheath cells are to similar in mesophyll cells in (a)Having gra...

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  15. Diurnal acid cycle is: 1) As efficient as C 4 cycle 2) Responsibl...

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  16. Photorespiration is useful for plants as it: 1) Protects plants from ...

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  17. In C2 cycle oxygenation and decarboxylation is occur respectively in: ...

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  18. Select the correct match for C4 cycle —

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  19. Choose the odd one w.r.t the four carbon acid formed during C4 cycle

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  20. At low light intensities, increase of CO2 concentration will

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