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Test: Kingdom Monera (NCERT) - NEET MCQ


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15 Questions MCQ Test Biology Class 11 - Test: Kingdom Monera (NCERT)

Test: Kingdom Monera (NCERT) for NEET 2024 is part of Biology Class 11 preparation. The Test: Kingdom Monera (NCERT) questions and answers have been prepared according to the NEET exam syllabus.The Test: Kingdom Monera (NCERT) MCQs are made for NEET 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Test: Kingdom Monera (NCERT) below.
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Test: Kingdom Monera (NCERT) - Question 1

Which one of the following is an incorrect statement regarding mycoplasma?

Detailed Solution for Test: Kingdom Monera (NCERT) - Question 1

Mycoplasma or mollicutes are the simplest and the smallest of the free living prokaryotes classified under kingdom Monera. They were discovered in pleural fluid of cattle suffering from pleuropneumonial (Nocard and Roux, 1898). The size ranges from 0.1-0.15 μm. A cell wall is absent. Plasma membrane forms the outer boundary of the cell. They mostly produce pleuropneumonia in domestic animals, a typical pneumonia and mycoplasmal urethritis in humans, little leaf disease of brinjal and witche, broom in plants. Mycoplasma can survive without O2.

Test: Kingdom Monera (NCERT) - Question 2

Select the pair that consists of plant or animal bacterial diseases.

Detailed Solution for Test: Kingdom Monera (NCERT) - Question 2

Pathogen of cholera is Vibrio cholerae bacterium. Cholera is transmitted by contaminated water. Typhoic or eneric fever spreads through contaminated water in which bacterium Salmonella typhi is present. Citrus canker and crown gall are bacterial diseases of plants caused by Xanthomonas citri and Anrobacterium tumefaciens, respectively.

So, the correct option is 'Both (a) and (b)'.

Test: Kingdom Monera (NCERT) - Question 3

Bacteria are grouped under four categories according to their shape. Study the given figures and select the correct option regarding this.

Detailed Solution for Test: Kingdom Monera (NCERT) - Question 3

Bacteria are grouped under four categories based on their shapes: the spherical coccus (pl.: coccl), the rod-shaped bacillus (pi.: bacilli), the comma-shaped vibrium (pl.: vibrio) and the spiral spirillum (pl.: spirilla).

Test: Kingdom Monera (NCERT) - Question 4

Read the following statements regarding methanogens and select the correct option.
(i) They are included in the group Archaebacteria.
(ii) They are responsible for the production of biogas in gobar gas plants.
(iii) They live in hot sulphur springs.
(iv) They are strictly anaerobic.

Detailed Solution for Test: Kingdom Monera (NCERT) - Question 4

Methanogens have autotrophic mode of nutrition. They can obtain their own food as a source of carbon and energy from the dead and decay matter. In the marshy areas, methanogens are responsible for the conversion of carbon dioxide and formic acid into the methane gas in the presence of hydrogen. This competence of methanogen bacteria could be exploited for the commercial production of fuel gas and methane gas in the fuel plants or the gobar gas plants.

Test: Kingdom Monera (NCERT) - Question 5

Given figure is of filamentous blue green alga Nostoc Identify the parts marked as A and B and select the correct option.

Detailed Solution for Test: Kingdom Monera (NCERT) - Question 5

Nostoc occurs in both aquatic and subaerial habitats. A dense mucilage covering (labelled as B in the given figure) is present on the outside. Each trichome is beaded, S-shaped and consists of a large number of vegetative cells, a few term in a land intercalary large pale coloured heterocysts - (labelled as A in the given figure) and thick-walled resting cells called akinetes. Heterocysts are specialised to perform nitrogen fixation.

Test: Kingdom Monera (NCERT) - Question 6

Which of the following statements is incorrect regarding the structure of a typical bacterial cell?

Detailed Solution for Test: Kingdom Monera (NCERT) - Question 6

In a bacterial cell, membrane bound cell organelles as found in eukaryotes are absent. Various structures present in the cytoplasm of a prokaryotic cell include mesosomes, 70S ribosomes, nucleoid, plasmids, gas vacuoles, food reserve, etc.

Test: Kingdom Monera (NCERT) - Question 7

______ is the most common method of reproduction in bacteria.

Detailed Solution for Test: Kingdom Monera (NCERT) - Question 7

Reproduction in bacteria occurs by three methods - binary fission, sporulation and sexual reproduction. Binary fission is the most common method of bacterial multiplication under favourable conditions, in which a mature bacterium divides into two equal daughter cells.

Test: Kingdom Monera (NCERT) - Question 8

Cyanobacteria are classified under which of the following kingdoms?

Detailed Solution for Test: Kingdom Monera (NCERT) - Question 8

Cyano bacteria or blue-green algae are Gram + photosynthetic prokaryotes which perform oxygenic photo- synthesis. Photosynthetic pigments include chlorophyll a, carotenoids  and phycobilins. Cyanobacteria are classified under kingdom Monera. Cyanobacterial cell structure is  typically prokaryotic - one envelope organisation with peptidoglycan wall, naked DNA, 70S ribosomes and absence of membrane bound structures like endoplasmic reticulum, mltochondria, Golgi bodies, plastids, lysosomes, sap vacuoles. The outer part of the protoplast, called chromoplasm, contains a number of photosynthetic thylakoids.

Test: Kingdom Monera (NCERT) - Question 9

_____ bacteria oxidise various inorganic substances such as nitrates, nitrites and ammonia, and use the released energy for ATP production. They play an important role in recycling of nutrients (N, P, Fe, S etc.).

Detailed Solution for Test: Kingdom Monera (NCERT) - Question 9

Chemoautotrophic bacteria or chemosynthetic  autotrophic bacteria are able to manufacture their organic food from inorganic raw materials with the help of energy derived from exergonic chemical reactions Involving oxidation of an inorganic substance present in the external medium. The chemical energy obtained from oxidation reaction is trapped in ATP molecules. This energy is then used in carbon assimilation with the help of hydrogen brought from sources other than water. There are several types of chemoautotrophic bacteria but the well known examples are nitrifying bacteria, sulphur oxidising bacteria and iron bacteria.

Test: Kingdom Monera (NCERT) - Question 10

Read the following statements and select the correct option.
Statement 1: Almost all bacteria possess lipoproteinaceous plasma membrane.
Statement 2: The plasma membrane of archaebacteria as well as eubacteria have same type of lipids.

Detailed Solution for Test: Kingdom Monera (NCERT) - Question 10

Bacterial plasma membrane or plasmalemma has a structure similar to that of a typical membrane. It is made of a phospholipid bilayer with proteins of various types (extrinsic, integral, transmembrane). Archaebacteria are a group of most primitive prokaryotes which are able te survive in extremely hostile conditions. Their cell membranes are different from eubacteria and are characterized by the presence of a monolayer of branched chain lipids.

Test: Kingdom Monera (NCERT) - Question 11

_____ are important decomposers that cause decay and decomposition of dead bodies of plants and animals.

Detailed Solution for Test: Kingdom Monera (NCERT) - Question 11

Saprophytic bacteria are free living bacteria which obtain their food from organic remains, e.g., corpses, animal excreta, fallen leaves, vegetables, fruits, meat, jams, jellies, bread and other products of plant and animal origin. Aerobic breakdown of organic compounds is known as decay. In nature saprophytic bacteria alongwith saprotrophic fungi are the decomposers of organic remains.

Test: Kingdom Monera (NCERT) - Question 12

Cyanobacteria are used in agricultural fields for improvement because they cause

Detailed Solution for Test: Kingdom Monera (NCERT) - Question 12

Several cyanobacteria have the ability of nitrogen fixation. The filamentous forms possess special large pale cells or heterocysts for this. Some of the fixed nitrogen comes out as excretion. After death of cyanobacteria the substratum becomes rich in nitrogen. Such nitrogen fixing cyanobacteria are now regularly inoculated in the rice fields This saves application of nitrogen fertilizers.

Test: Kingdom Monera (NCERT) - Question 13

Select the correct statement regarding heterocysts.

Detailed Solution for Test: Kingdom Monera (NCERT) - Question 13

Heterocyst is a large-sized pale coloured thick-walled cell which occurs in terminal, intercalary or lateral position in filamentous cyanobacteria, e.g., Nostoc. The thick wall impermeable to oxygen but permeable to nitrogen. Mucilage sheath is absent. Photosystem II is absent. Thylakoids laid phycobilisomes. Therefore, photosynthesis is absent but cyclic photophosphorylation occurs. Heterocyst is dependent for its nourishment on adjacent vegetative cells. It has enzyme nitrogenase and so, it is specialised to perform nitrogen fixation.

Test: Kingdom Monera (NCERT) - Question 14

In 5-kingdom classification system, the kingdom that includes the blue-green algae, nitrogen-fixing bacteria and methanogenic archaebacteria, is

Detailed Solution for Test: Kingdom Monera (NCERT) - Question 14

Monera kingdom includes prokaryotes - mycoplasma bacteria, actinomycetes and cyanobacteria or blue greet algae. Alongwith fungi, they are decomposers and mineralisers of the biosphere.

Test: Kingdom Monera (NCERT) - Question 15

Assertion: Prokaryotic chromosome differs from a eukaryotic one by the absence of histone proteins

Reason: Bacterial cell is a prokaryote

Detailed Solution for Test: Kingdom Monera (NCERT) - Question 15

Answer: (b)

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