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How are organisms like Pseudomonas and Thiobacillus of great s
Biology Exemplar
Biology Exemplar

Class 11

NCERT Exemplar

Publisher:
NCERT
Subject:
Biology
1

Chapter 1: The Living World

37 questions

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2

Chapter 2: Biological Classification

33 questions

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3

Chapter 3: Plant Kingdom

28 questions

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4

Chapter 4: Animal Kingdom

45 questions

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5

Chapter 5: Morphology of Flowering Plants

42 questions

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6

Chapter 6: Anatomy of Flowering Plants

52 questions

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7

Chapter 7: Structural Organization in Animals

48 questions

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8

Chapter 8: Cell: The Unit of Life

39 questions

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9

Chapter 9: Biomolecules

31 questions

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10

Chapter 10: Cell Cycle and Cell Division

43 questions

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11

Chapter 11: Transport in Plants

66 questions

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12

Chapter 12: Mineral Nutrition

39 questions

Q1
How is sulphur important for plants? Name the amino acids in which it is present.
Q2
How are organisms like Pseudomonas and Thiobacillus of great significance in nitrogen cycle?
Q3
It is observed that deficiency of a particular element showed its symptoms initially in older leaves and then in younger leaves.
(a) Does it indicate that the element is actively mobilised or relatively immobile?
(b) Name two elements which are highly mobile and two which are relatively immobile.
(c) How is the aspect of mobility of elements important to horticulture and agriculture?
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13

Chapter 13: Photosynthesis in Higher Plants

59 questions

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14

Chapter 14: Respiration in Plants

42 questions

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15

Chapter 15: Plant Growth and Development

48 questions

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16

Chapter 16: Digestion and Absorption

34 questions

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17

Chapter 17: Breathing and Exchange of Gases

32 questions

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18

Chapter 18: Body Fluids and Circulation

42 questions

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19

Chapter 19: Excretory Products and their Elimination

44 questions

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20

Chapter 20: Locomotion and Movement

39 questions

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21

Chapter 21: Neural Control and Coordination

31 questions

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22

Chapter 22: Chemical Coordination and Integration

39 questions

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Question
Hard
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How are organisms like Pseudomonas and Thiobacillus of great significance in nitrogen cycle?

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In biological nitrogen fixation, the atmospheric gets reduced to by nitrogenase reductase present in some prokaryotes. is then oxidises to and by some other bacteria (Nitrosomonas and Nitrobacter). Various steps involved in nitrogenfixation are as follows
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Pseudomonas and Thiobacillus are involved in the process of denitrification. They convert nitrate and nitrite into free nitrogen ( , which is released into the atmosphere.
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Practice more questions from Biology Exemplar (NCERT Exemplar)

Q1
How is sulphur important for plants? Name the amino acids in which it is present.
Q2
How are organisms like Pseudomonas and Thiobacillus of great significance in nitrogen cycle?
Q3
It is observed that deficiency of a particular element showed its symptoms initially in older leaves and then in younger leaves.
(a) Does it indicate that the element is actively mobilised or relatively immobile?
(b) Name two elements which are highly mobile and two which are relatively immobile.
(c) How is the aspect of mobility of elements important to horticulture and agriculture?
View all

Practice questions from Biology Exemplar (NCERT Exemplar)

Question 1
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Deficiency symptoms of an element tend to appear first in young leaves. It indicates that the element is relatively immobile. Which one of the following elemental deficiency would show such symptoms?
Topic

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Book

Book:

Biology Exemplar (NCERT Exemplar)

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Question 2
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Biology Exemplar (NCERT Exemplar)

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Question 3
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Biology Exemplar (NCERT Exemplar)

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Question 4
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Name one non-symbiotic nitrogen fixing prokaryote.
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Which of the following statement is incorrect ?
  1. Plants take very little amount of mineral elements from soil.
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Question Text
How are organisms like Pseudomonas and Thiobacillus of great significance in nitrogen cycle?
TopicMineral Nutrition
SubjectBiology
ClassClass 11
Answer TypeText solution:1
Upvotes147