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Select the correct statements from th...

Select the correct statements from the given
(a) Nitrogenase is heterodimeric protein.
(b) Root hairs curl by action of nitrogenase and plant nod factors.
(c ) During symbiotic ` N_ 2 ` fixation ATP is provided by legumes plant.

A

(b) & (c )

B

(a) & (c )

C

Only ( c )

D

(a) & (b )

Text Solution

AI Generated Solution

The correct Answer is:
To solve the question, we need to evaluate each of the statements provided: ### Step 1: Evaluate Statement (a) **Statement (a): Nitrogenase is a heterodimeric protein.** - **Analysis**: Nitrogenase is an enzyme involved in nitrogen fixation, converting atmospheric nitrogen (N₂) into ammonia (NH₃). The correct classification of nitrogenase is that it is a heterotetrameric protein, not a heterodimeric protein. It consists of multiple subunits, typically two alpha and two beta subunits, making it a tetramer. Therefore, this statement is **incorrect**. ### Step 2: Evaluate Statement (b) **Statement (b): Root hairs curl by the action of nitrogenase and plant nod factors.** - **Analysis**: Root hair curling is indeed influenced by the interaction between the leguminous plant and the nitrogen-fixing bacteria, such as Rhizobium. The plant releases flavonoids that stimulate the bacteria to produce nodulation factors (nod factors), which then lead to the curling of the root hairs, facilitating the infection process. Thus, this statement is **correct**. ### Step 3: Evaluate Statement (c) **Statement (c): During symbiotic N₂ fixation, ATP is provided by legumes.** - **Analysis**: In the symbiotic relationship between legumes and Rhizobium, the plant provides ATP to the bacteria for the nitrogen fixation process. The bacteria require energy to convert nitrogen gas into ammonia, and this energy is supplied by the plant. Therefore, this statement is also **correct**. ### Conclusion After evaluating all three statements: - Statement (a) is **incorrect**. - Statement (b) is **correct**. - Statement (c) is **correct**. Thus, the correct statements are **(b) and (c)**. ---
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AAKASH INSTITUTE ENGLISH-MINERAL NUTRITION-ASSIGNMENT (SECTION B)
  1. Hunger signs in plants are

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  2. (a) Moderate decrease of increase on micronutrients causes deficie...

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  3. Movement of electrolytes through the roots is generally

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  4. Initial phase of ion uptake

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  5. The translocation of solute is

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  6. The process of conversion of 2 NO3 ^(- ) to 2 NO 3 ^(-) to...

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  7. Process of nitrification and nitrate assimilation are

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  8. Conversion of NO(3) to NO(2) to NH(4) is called and is catalysed by

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  9. Most common form of nitrogen uptake and usable forms for plant...

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  10. Which of the following is/are diazotrophs ?

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  11. Which is not true for nitrogenase enzyme in root nodules in legumes?

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  12. Leghemoglobin is found in which one of the following organisms ?

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  13. How many electron and protons are required to fix a dinitrogen ?

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  14. Cycas and Azolla plants are associated with

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  15. Select the correct statements from the given (a) Nitrogenase is...

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  16. Nitrogenase enzyme found in root nodules in legumes contains

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  17. The amino acid which plays a central role in nitrogen metabolism ...

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  18. Transported and storage form of nitrogen in plants are

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  19. Ureides are preferred forms for storage and transport of nitrogen ...

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  20. Essential elements are

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