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Assertion :- In all photosynthetic plant...

Assertion :- In all photosynthetic plants first fixa- tion product during biosynthetic phase of photosyn- thesis is PGA.
Reason :- PGA is the most stable product and is synthesised from both RuBP and PEP, whenever they act as first CO2 accepting substance.

A

If both assertion and reason are true and reason is the correct explanation of assertion.

B

If both assertion and reason are true but reason is not the correct explanation of assertion.

C

If assertion is true but reason is false.

D

If both assertion and reason are false.

Text Solution

Verified by Experts

The correct Answer is:
D
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Which statements about photosynthesis are correct ? First CO_(2 ) acceptor in C_4 cycle is PGA (b) In C_(3) Plants , first stable product of photosynthesis is RuBP ( c) Oxygen liberated during photosunthesis comes from water

Assertion : Photorespiration is found in all plants Reason : In C_(4) plants, first CO_(2) fixation product is formed in bundle sheath cells

Consider the following statements with respect to photosynthesis (A) The first carbon dioxide acceptor in C_(4) cycle is PGA (B) In C_(3) plants, the first stable product of photosynthesis during dark reaction is RuBP (C) Cyclic photophophorylation results in the formation of ATP (D) Oxygen which is liberated during photosynthesis comes from water

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.

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

Assertion : The complete combustion of glucose, which produces CO_(2)" and "H_(2)0 as end products, yields energy most of which is given out as heat. Reason: There are sufficient reasons to believe that the first cells on this planet lived in an atmosphere that lacked oxygen.

Given below are some characteristics of photosynthetic plants. Which of these are true for C_(4) plants (i) Rubisco is present in the mesophyll cells (ii) 3-carbons in the primary CO_(2) acceptor (iii) The primary CO_(2) fixation product is PGA (iv) Possess PEP case. (v) The intitial carboxylation reaction occurs in bundle sheath cells (vi) The calvin cycle takes place in bundle sheath cells (vii) 4-carbon atoms in the primary CO_(2) fixation product.

MOTION-PHOTOSYNTHESIS IN HIGHER PLANTS-Exercise - 4 (ASSERTION & REASON QUESTIONS)
  1. Assertion :- Energy is not required to pump protons from stroma to lum...

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  2. Assertion:- Biosynthetic phase of photosynthesis is also termed as dar...

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  3. Assertion :- In all photosynthetic plants first fixa- tion product dur...

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  4. Assertion :- Carboxylation is the most crucial step of the Calvin cycl...

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  5. Assertion :- To make one molecule of glucose 6 turns of Calvin cycle a...

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  6. Assertion :- C(4) pathway can not effectively work at low temperature ...

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  7. Assertion :- C(4) plants can tolerate high light intensities. Reason...

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  8. Assertion :- In C(4) plants there is no photorespiration Reason :- I...

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  9. Assertion :- C(4) plants show greater productivity of biomass. Reaso...

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  10. Assertion :- C(4) plants can perform better phtosynthesis even in low ...

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  11. Assertion :- In mesophyll cells of C(4) plants there is no sugar forma...

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  12. Assertion :- In C(4) plants CO(2) always transports to bundle sheath c...

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  13. Assertion :- C(4) plants are less efficient than C(3) plants Reason ...

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  14. Assertion :- The basic pathway that results in formation of sugars, th...

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  15. Assertion :- Rubisco show either carboxylation or oxygenation activity...

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  16. Assertion :- Photorespiration is one of the wasteful processes. Reas...

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  17. Assertion :- In C(4) plants there is no photorespiration. Reason :- ...

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  18. Assertion :- Photosynthetic productivity of plants is also governed by...

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  19. Assertion :- In Aquatic conditions usually CO(2) concentration regulat...

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  20. Assertion :- In terrestrial conditions CO(2) usually acts as main dete...

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