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Test: Kingdom Monera - 1 - NEET MCQ


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10 Questions MCQ Test Biology Class 11 - Test: Kingdom Monera - 1

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

Cyanobacteria do not possess which feature?

Detailed Solution for Test: Kingdom Monera - 1 - Question 1

The cyanobacteria are unicellular, colonial or filamentous, freshwater/marine or terrestrial algae. The colonies are generally surrounded by gelatinous sheath. They often form blooms in polluted water bodies.

Test: Kingdom Monera - 1 - Question 2

Which of the following is the only group of organisms capable of using inorganic compounds as source of energy:

Detailed Solution for Test: Kingdom Monera - 1 - Question 2

Some of the bacteria are autotrophic, i.e., they synthesise their own food from inorganic substrates. They may be photosynthetic autotrophic or chemosynthetic autotrophic.

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Test: Kingdom Monera - 1 - Question 3

Select the correct combination of the statements (i-iv) regarding the characteristics of certain organisms.

(i) Methanogens are archaebacteria which produce methane in marshy areas.

(ii) Nostoc is a filamentous blue-green alga which fixes atmospheric nitrogen.

(iii) Chemosynthetic autotrophic bacteria synthesise cellulose from glucose.

(iv) Mycoplasma lack a cell wall and can survive without oxygen.

Detailed Solution for Test: Kingdom Monera - 1 - Question 3

Chemosynthetic autotrophic bacteria oxidise various inorganic substances such as nitrates, nitrites and ammonia and use the released energy for their ATP production. They play a great role in recycling nutrients like nitrogen, phosphorous, iron and sulphur.

Test: Kingdom Monera - 1 - Question 4

Identify distinctive features for kingdom Monera.

(a) It includes prokaryotic cells with nucleus and membrane bound cell organelles.
(b) Some of the Monerans are autotrophic and some of them are heterotrophic forms.
(c) Monera have been divided into two domains, archaeabacteria and eubacteria.
(d) Bacteria and diatoms  are the sole members of the Kingdom Monera.

Detailed Solution for Test: Kingdom Monera - 1 - Question 4

Let's examine the features:

(a) Incorrect. Kingdom Monera includes prokaryotic cells, which do not have a nucleus or membrane-bound organelles.

(b) Correct. Monerans (bacteria) can be autotrophic (e.g., cyanobacteria) or heterotrophic (e.g., most bacteria).

(c) Correct. Monera has been divided into two domains: Archaeabacteria and Eubacteria.

(d) Incorrect. only Bacteria are the sole members of the Kingdom Monera

Test: Kingdom Monera - 1 - Question 5

Assertion: Mycoplasma is pathogenic both to animaLs and plants 
Reason: These organisms lack cell wall and can survive without oxygen 

Detailed Solution for Test: Kingdom Monera - 1 - Question 5

(B) - Mycoplasma is pathogenic to both animals and plants.
- These organisms lack cell walls and can survive without oxygen.
 

BOTH statements are true but reason is not the correct explaination of assertion 

Test: Kingdom Monera - 1 - Question 6

 

Which of the following are found in extreme saline conditions?

Detailed Solution for Test: Kingdom Monera - 1 - Question 6

Archaebacteria are special since they live in some of the most harsh habitats such as extreme salty areas (halophiles), hot springs (thermoacidophiles) and marshy areas (methanogens). Archaebacteria differ from other bacteria in having a different cell wall structure and this feature is responsible for their survival in extreme conditions
.

Test: Kingdom Monera - 1 - Question 7

What is the primary function of heterocysts in certain cyanobacteria species?

Detailed Solution for Test: Kingdom Monera - 1 - Question 7

Heterocysts in cyanobacteria, such as Nostoc and Anabaena, serve the crucial function of nitrogen fixation. These specialized cells enable the conversion of atmospheric nitrogen into a form that can be utilized by the organism. This process is essential for the cyanobacteria to thrive in environments with limited nitrogen availability, contributing to the recycling of nutrients and supporting the overall ecosystem.

Test: Kingdom Monera - 1 - Question 8

Assertion(A): Archaebacteria are special bacteria.
Reason(R): They live in harsh habitats.

Detailed Solution for Test: Kingdom Monera - 1 - Question 8

 Both (A) and (R) are true and (R) is the correct explanation of (A).
- Archaebacteria are unique bacteria that live in extreme environments like hot springs, acidic environments, and salt flats.
- Their ability to survive in such harsh habitats showcases their special nature.
- The reason given, that they live in harsh habitats, indeed explains why Archaebacteria are considered special.
- Therefore, option A is the correct choice.A)

Test: Kingdom Monera - 1 - Question 9

According to the three-domain system, how many domains do organisms from the Kingdom Monera belong to?

Detailed Solution for Test: Kingdom Monera - 1 - Question 9

The three-domain system has also been proposed that divides the Kingdom Monera into two domains, leaving the remaining eukaryotic kingdoms in the third domain and thereby a six kingdom classification

Test: Kingdom Monera - 1 - Question 10

What is the primary role of heterotrophic bacteria in nature?

Detailed Solution for Test: Kingdom Monera - 1 - Question 10

Heterotrophic bacteria are most abundant in nature. The majority are important decomposers. Many of them have a significant impact on human affairs. They are helpful in making curd from milk, production of antibiotics, fixing nitrogen in legume  roots, etc. Some are pathogens causing damage to human beings, crops, farm animals and pets. Cholera, typhoid, tetanus, citrus canker are well known diseases caused by different bacteria.

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