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Besides providing pink colour to the roo...

Besides providing pink colour to the root nodules, leghaemoglobin performs the function of
1. protecting enzyme nitrogenase from free oxygen
2. transporting nitrogen to host cells
3. protecting bacteroids from the enzymes of host cell
4. protecting leakage of fixed nitrogen to the soil atmosphere

A

protecting enzyme nitrogenase from free oxygen

B

transporting nitrogen to host cells

C

protecting bacteroids from the enzymes of host cell

D

protecting leakage of fixed nitrogen to the soil atmosphere

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Nitrogen fixing enzyme in root nodule is 1. nitrase 2. nitrogenase 3. nitrosomonas 4. nitrogen esterase

Assertion : Nitrogen fixing enzyme in legume root nodules function at low oxygen concentration. Reason : Low oxygen concentration is provided by leghaemoglobin.

In root nodules of leguminous plants, the pigment leghamoglobin that gives pink colour to the nodules, is present in the 1. intercellular spaces 2. cytosol of bacteroids 3. inside the bacterial wall 4. outside the peribacterial space in the cytosol of nodule cells.

Which of the following statements about the nitrogen cycle are false ? 1. Rhizobium and Frankia cause nitrogen fixation in their independent free - living stage . 2. Azotobacter and Anabaena are anaerobic, symbiotic , free - living , nitrogen fixers. 3. Rhodospirillum is an aerobic , nitrogen -fixing microbe found in the root nodules of legumes . 4. Nitrobacter oxidizes nitrites to nitrates .

Assertion: Nitrogen-fixing bacteria of legume nodules live in O_2 depleted cells. Reason: Leghaemoglobin completely removes O_2 from the nodule cells.

Gemma cups are located on the male and female thalmi of Marchantia as 1. they are always attached to thalami 2. they are detached from the parent body and germinate to form new individuals 3. Gemma cups are protective in function 4. they produce gametes

Read the following statements regarding the mineral nutrition in plants (1) For the elements that are actively mobilized within the plants, the deficiency symptoms tend to appear first in the young tissues. (2) Manganese competes with iron and magnesium for uptake and with magnesium for binding with enzymes. (3) Manganese inhibits calcium traslocation in shoot apex. (4) Rhodospirillum is aerobic free-living nitrogen fixing microbe. Which of these are correct

TRUEMAN BIOLOGY-MINERAL NUTRITION-MULTIPLE CHOICE QUESTIONS
  1. Organisms that fix nitrogen in aquatic habitats are

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  2. In root nodules of leguminous plants, the pigment leghamoglobin that g...

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  3. Besides providing pink colour to the root nodules, leghaemoglobin perf...

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  4. Major nitrogen flxation is carried out by

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  5. Which one plays an important role in energy metabolism? 1. Calcium ...

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  6. Most of the plants obtain nitrogen from the soil in the form of 1. ni...

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  7. Deficiency of nitrogen produces

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  8. Plants absorb sulphur in the form of 1. SO(4) from soil 2. SO(2) fr...

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  9. Which of the following is an micronutrient essential for plants?

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  10. Which of the following is not an essential micronutrient ?

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  11. Which one of the following elements is not required by plants for thei...

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  12. Carbon becomes available to crop plants in the form of

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  13. On the basis of symptoms of chlorosis in leaves, a student inferred th...

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  14. Fertilizers are usually enriched in NPK which denotes

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  15. Which one is component of ferredoxin ?

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  16. Potassium is involved in

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  17. The deficiency symptom of phosphorus is

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  18. Due to deficiency of phosphorus

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  19. In plants a common symptom caused by deficiency of P, K, Ca and Mg is

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  20. Pungent principle, a sinigrin, of crucifers is a

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