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Chlorophyll shows an outburst of floures...

Chlorophyll shows an outburst of flourescence during the first few moments of illumination. This effect is called

A

Emerson's effect

B

Kautsky effect

C

Hamburger effect

D

Hill effect

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The correct Answer is:
B
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In the atmosphere, carbon dioxide is found in two forms, i.e., ^12CO_2 and ^14CO_2 . Plants absord CO_2 during photosynthesis in presence of chlorophyll, plants systhesise glucose 6CO_2 +6 H_2O rarr C_6H_12O_6 + 6O_2uarr Half life of ^14CO_2 is 5760 years. The analysis of wooden artifacts for ^14C and ^12C gives useful information for determination of its age. All living organisms, because of their constant exchange of Carbon dioxide with the surroundings have the same ratio of C-14 to C-12, i.e. 1.3xx10^-12 . When an organism dies, the C-14 in it keeps on decaying as follows: 6^14Crarr7^14N+(-1)^0e +Energy Thus, the ratio of C-14 and C-12 decreases with the passage of time. We can measure the proportion of C-14 in the remains of dead organism and determine how long ago it died. The method of carbon dating can be used to date anything made or organic matter, e.g., bone, skeleton, wood, etc. Using carbon dating, materials have been dated to about 50,000 years with accuracy. A piece of wood from an archeological source shows a C-14 activity which is 60% of the activity found in fresh wood today. The age of archeological sample will be:

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TRUEMAN BIOLOGY-PHOTOSYNTHESIS IN HIGHER PLANTS-MULTIPLE CHOICE QUESTIONS
  1. Warburg effect has not been observed in

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  2. In C(4) cycle, first CO(2) acceptor is

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  3. Chlorophyll shows an outburst of flourescence during the first few mo...

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  4. Photophosphorylation in chloroplast is most similar to which of the fo...

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  5. In an experiment, the carbon dioxide available to a C(3) plant was lab...

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  6. Which of the following kinds of plant fixes carbon dioxide by way of c...

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  7. The chemiosmotic theory of ATP synthesis in the chloroplast and mitoch...

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  8. A photosystem contains

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  9. Which pair is wrong

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  10. Choose the correct statement for the fixation of one CO(2) molecule

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  11. During non- cyclic photophosphorylation ATP molecules are produced thr...

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  12. Emerson effect is related to

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  13. Radioactive isotopes of oxygen (O""^(18)) was used to know the source ...

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  14. Which of the following photosynthetic characteristics are present in C...

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  15. The following compounds are intermediates in the pathway of photorespi...

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  16. C(4) plants have how many carboxylations?

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  17. Inhibition of photosynthesis in high concentration of oxygen is mainly...

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  18. During light reaction of photosynthesis the electrons lost by pigment ...

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  19. Which of the following is essentially regenerated to complete the Calv...

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  20. During photorespiration glycolic acid is oxidised to glyoxylic acid in...

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