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Test: Biogas, Biocontrol Agents & Biofertilisers: Microbes - NEET MCQ


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5 Questions MCQ Test Biology Class 12 - Test: Biogas, Biocontrol Agents & Biofertilisers: Microbes

Test: Biogas, Biocontrol Agents & Biofertilisers: Microbes for NEET 2024 is part of Biology Class 12 preparation. The Test: Biogas, Biocontrol Agents & Biofertilisers: Microbes questions and answers have been prepared according to the NEET exam syllabus.The Test: Biogas, Biocontrol Agents & Biofertilisers: Microbes MCQs are made for NEET 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Test: Biogas, Biocontrol Agents & Biofertilisers: Microbes below.
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Test: Biogas, Biocontrol Agents & Biofertilisers: Microbes - Question 1

Heterocysts that take part in nitrogen fixation occur in

Detailed Solution for Test: Biogas, Biocontrol Agents & Biofertilisers: Microbes - Question 1

Heterocysts or heterocytes are specialized nitrogen-fixing cells formed during nitrogen starvation by some filamentous cyanobacteria, such as Nostoc punctiforme, Cylindrospermum stagnale, and Anabaena sphaerica.

Test: Biogas, Biocontrol Agents & Biofertilisers: Microbes - Question 2

The residue left after methane production from cattle dung is

Detailed Solution for Test: Biogas, Biocontrol Agents & Biofertilisers: Microbes - Question 2

Thus gobar (excreta/dung) of cattle is rich in these bacteria. Dung can be used for generation of biogas, commonly called gobar gas.
The residue left after methane production from cattle dung is used as manure.

Test: Biogas, Biocontrol Agents & Biofertilisers: Microbes - Question 3

Which one of the following is not used in organic farming?

Detailed Solution for Test: Biogas, Biocontrol Agents & Biofertilisers: Microbes - Question 3

except snail, all these are used in organic farmning —

Glomus — Endomycorrhiza

Oscillatoria — BGA

Earthworm — Vermicompost.

Test: Biogas, Biocontrol Agents & Biofertilisers: Microbes - Question 4

VAM contains

Detailed Solution for Test: Biogas, Biocontrol Agents & Biofertilisers: Microbes - Question 4

VAM contains symbiotic fungi as VAM (Vesicular Arbuscular Mycorrhizae) grows luxuriently in less irrigated lands and association of VAM helps in conversion of less productive fields into more productive fields.

Test: Biogas, Biocontrol Agents & Biofertilisers: Microbes - Question 5

An example of endomycorrhizae is

Detailed Solution for Test: Biogas, Biocontrol Agents & Biofertilisers: Microbes - Question 5

Endomycorrhizal fungi (more commonly referred to as endomycorrhizae) is one of the major types of known mycorrhizae which differs from the another type of mycorrhizae, ectomycorrhizae, in structure. Unlike ectomycorrhizae which form a system of hyphae that grow around the cells of the root, the hyphae of the endomycorrhizae not only grow inside the root of the plant but penetrate the root cell walls and become enclosed in the cell membrane as well. This makes for a more invasive symbiotic relationship between the fungi and the plant. The penetrating hyphae create a greater contact surface area between the hyphae of the fungi and the plant.
Glomus is a genus of endomycorrhizal fungi, and all species form symbiotic relationships (mycorrhizas) with plant roots. 

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