NEET Exam  >  NEET Tests  >  Biology Class 12  >  Test: Microbes as Biofertilizers (NCERT) - NEET MCQ

Test: Microbes as Biofertilizers (NCERT) - NEET MCQ


Test Description

15 Questions MCQ Test Biology Class 12 - Test: Microbes as Biofertilizers (NCERT)

Test: Microbes as Biofertilizers (NCERT) for NEET 2024 is part of Biology Class 12 preparation. The Test: Microbes as Biofertilizers (NCERT) questions and answers have been prepared according to the NEET exam syllabus.The Test: Microbes as Biofertilizers (NCERT) MCQs are made for NEET 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Test: Microbes as Biofertilizers (NCERT) below.
Solutions of Test: Microbes as Biofertilizers (NCERT) questions in English are available as part of our Biology Class 12 for NEET & Test: Microbes as Biofertilizers (NCERT) solutions in Hindi for Biology Class 12 course. Download more important topics, notes, lectures and mock test series for NEET Exam by signing up for free. Attempt Test: Microbes as Biofertilizers (NCERT) | 15 questions in 15 minutes | Mock test for NEET preparation | Free important questions MCQ to study Biology Class 12 for NEET Exam | Download free PDF with solutions
Test: Microbes as Biofertilizers (NCERT) - Question 1

Organic farming does not include:

Detailed Solution for Test: Microbes as Biofertilizers (NCERT) - Question 1

Organic farming includes serval methods to enhance soil fertility. In such farming, methods of biological origin are used, e.g., biopesticides, biogertilisers, IPM (Integrated Pest Management) green manure, bioherbicides, keeping pess and pathogens under control, etc. chemical fertilisers are not used in organic farming.

Test: Microbes as Biofertilizers (NCERT) - Question 2

Farmers have reported over 50% higher yields of rice by using which of the following biofertilisers?

Detailed Solution for Test: Microbes as Biofertilizers (NCERT) - Question 2

Azolla pinnata is a small free floating freshwater fern which multiplies rapidly, doubling every 5-7 days. The fern can live with Anabaena symbiotically in rice field to fix atmospheric nitrogen. It does not interfere with their growth. In some South-East Asian countries, especially China, the rice fields are regularly provided with Azolla.

1 Crore+ students have signed up on EduRev. Have you? Download the App
Test: Microbes as Biofertilizers (NCERT) - Question 3

Unicellular symbiotic organisms that improve the yield of legumes by

Detailed Solution for Test: Microbes as Biofertilizers (NCERT) - Question 3

Symbiotic nitrogen fixing bacteria form a mutually beneficial association with the plants. The bacteria obtain food and shelter from plants. In return, they give a part of their fixied nitrogen to the plants. The most important of the symbiotic nitrogen fixing bacteria is Rhizobium. it forms nodule on the roots of legume plants. They develop the ability to fix nitrogen only when they are present inside the root nodules. in the nodule cells, bacteria (bacteroids) lie in groups surrounded by membrane of the host which is lined by a pink-red pigment called leghaemoglobin.

Test: Microbes as Biofertilizers (NCERT) - Question 4

Biofertilisers are organisms that enrich the nutrient quality of the soil. Which of the following can be used as biofertilisers?

Detailed Solution for Test: Microbes as Biofertilizers (NCERT) - Question 4

Biofertilisers are microorganisms which bring about nutrient enrichment of soil by enhancing the availability of nutrients to crops. Microorganisms which act as biofertilisers are bacteria, cyanobacteria (blue green algae) and mycorrhizal fungi. Bacteria and cyanobacteria have the property of nitrogen fixation while mycorrhizal fungi preferentially withdraw minerals from organic matter for the plant with which they are associated. They maximize ecological benefits and minimize environmental hazards.

Test: Microbes as Biofertilizers (NCERT) - Question 5

The reason that the chemical/synthetic fertilisers should be replaced by biofertilisers is that the former:

Detailed Solution for Test: Microbes as Biofertilizers (NCERT) - Question 5

Chemical fertilisers are being used in increasing amounts to increase output in high yielding varieties of crop plants. However, chemical fertilisers cause pollution of water bodies as well as groundwater, besides getting stored in crop plants. They are expensive and also require a lot of energy resources in their manufacture. 

Test: Microbes as Biofertilizers (NCERT) - Question 6

 Which of the following statements is not correct regarding mycorrhiza?

Detailed Solution for Test: Microbes as Biofertilizers (NCERT) - Question 6

Several fungi are known to form symbiotic association with plants, i.e., Mycorrhiza. The most common fungi partners of mycorrhiza are Glomus species. Mycorrhiza roots show a sparse or dense wooly growth of fungus hyphae on their surface. The fungus remains restricted to the cortex of the root. The vascular strands and growing parts are not affected. The fungal symbionts in these associations absorb phosphorus from soil and pass it to the plant. Plants having such associations show other resistance to root-borne pathogens and drought and an overall increase in plant growth and development.

Test: Microbes as Biofertilizers (NCERT) - Question 7

Cyanobacteria are:

Detailed Solution for Test: Microbes as Biofertilizers (NCERT) - Question 7

Cyanobacteria are photosynthetic, Gram negative prokaryotes. They have chlorophyll a and are probably major primary producers in the world's oceans. Hence, they are autotrophs.

Test: Microbes as Biofertilizers (NCERT) - Question 8

Which of the following statements is/are incorrect?
(i) Cyanobacteria are autotrophic microbes widely distributed in aquatic and terrestrial habitats.
(ii) Anabaena, Nostoc and Oscillatoria are photosynthetic N2 - fixing cyanobacteria.
(iii) Tolypothrix (BGA) can increase rice production by about 20%.
(iv) BGA add organic matter to the soil and increase its fertility.
(v) In our country, fertilizers are not available commercially in the markets for farmers.

Detailed Solution for Test: Microbes as Biofertilizers (NCERT) - Question 8

Biofertilizers are available commercially in our country for farmers.

Test: Microbes as Biofertilizers (NCERT) - Question 9

A nitrogen fixing microbe associated with the fern Azolla in rice fields is:

Detailed Solution for Test: Microbes as Biofertilizers (NCERT) - Question 9

Anabaena azollae, a cyanobacterium that lives in symbiotic association with the free-floating water fern Azolla. Anabaena azollae can grow Photo-autotrophically and fixes atmospheric nitrogen. The inoculation of cyanobacteria in rice crops significantly influences the growth of rice crop by secretion of ammonia in flood water.

Test: Microbes as Biofertilizers (NCERT) - Question 10

Which of the following options includes biofertilisers?

Detailed Solution for Test: Microbes as Biofertilizers (NCERT) - Question 10

Nostoc and Oscillatoria are nitrogen fixing cyanbacteria. They add organic matter as well as extra nitrogen to the soil. Cyanobacteria are very important and low-cost biofertilisers.

Test: Microbes as Biofertilizers (NCERT) - Question 11

Which of the following is non-symbiotic biofertilizer?

Detailed Solution for Test: Microbes as Biofertilizers (NCERT) - Question 11

Bacteria, such as Azotobacter is free living  and can fix atmospheric nitrogen in the soil, thus enriching nitrogen content of the soil.

Test: Microbes as Biofertilizers (NCERT) - Question 12

Which one of the following pairs is correctly matched?

Detailed Solution for Test: Microbes as Biofertilizers (NCERT) - Question 12

Mycorrhiza is a symbiotic association of a fungus with the roots of a higher plant. Ectomycorrhiza, which lie on surface of the root, help in direct absorption of minerals from the soil over a large area. Rhizobium is a Parasite and Azospirillum is a free living nitrogen fixing bacteria. Methanogenic bacteria help in production of biogas

Test: Microbes as Biofertilizers (NCERT) - Question 13

Match column I with column II and select the correct answer from the codes given below.

Detailed Solution for Test: Microbes as Biofertilizers (NCERT) - Question 13
  • Mycorrhizae helps in phosphorus uptake from the soil.
  • Bacillus thuringiensis is a bioinsecticide.
  • Leghaemoglobin is present in the root nodules in leguminous plants.
  • Azadiractin is a secondary metabolite present in the neem seeds and it acts as a biopesticide.
Test: Microbes as Biofertilizers (NCERT) - Question 14

Nitrogen fixation in root nodules of alnus is brought about by

Detailed Solution for Test: Microbes as Biofertilizers (NCERT) - Question 14

Frankia, a nitrogen fixing mycelial bacterium(actinomycete), is associated symbiotically with roots nodules of several non - legume plants like Alnus(Alder), Myrica, rubus etc.

Test: Microbes as Biofertilizers (NCERT) - Question 15

Which one of the following can be used as biofertiliser in cotton field?

Detailed Solution for Test: Microbes as Biofertilizers (NCERT) - Question 15

Cotton is a dicotyledonous crop. The best biofertiliser for cotton is Bacillus cereus and Azotobacter chroococcum. These are free-living N2 fixing bacteria and enhance the fertility of the soil.

122 videos|311 docs|196 tests
Information about Test: Microbes as Biofertilizers (NCERT) Page
In this test you can find the Exam questions for Test: Microbes as Biofertilizers (NCERT) solved & explained in the simplest way possible. Besides giving Questions and answers for Test: Microbes as Biofertilizers (NCERT), EduRev gives you an ample number of Online tests for practice

Up next

122 videos|311 docs|196 tests
Download as PDF

Up next