What Are the Key Types and Examples of Organisms in Kingdom Monera?
Understanding Monera Questions With Answers is essential for mastering concepts in biology. These questions cover definitions, examples, diagrams, and explanations about the Kingdom Monera, which includes bacteria and cyanobacteria. By working through well-explained answers, students can strengthen their conceptual clarity for entrance exams and board preparations. Explore the topic further to enhance your learning and exam performance.
Monera Questions With Answers: Definition and Key Concepts
Kingdom Monera includes all unicellular prokaryotic organisms, such as bacteria and cyanobacteria. These organisms lack a well-defined nucleus and membrane-bound organelles. Monera are among the oldest and most abundant life forms on Earth. Understanding their structure, classification, and behavior helps explain many biological processes, including nutrient cycling and disease causation.
- Monera Questions With Answers definition: Structured queries that test and explain concepts about Kingdom Monera.
- Examples: Questions on bacterial reproduction, cell wall composition, and flagellar arrangements.
- Notes: Monera are classified into archaebacteria and eubacteria, and can thrive in extreme environments.
For deeper insights into differences between organisms, check out this resource on acquired and inherited traits.
Types of Monera: Classification and Characteristics
| Type | Definition | Examples |
|---|---|---|
| Archaebacteria | Primitive bacteria living in extreme environments | Methanogens, Halophiles, Thermoacidophiles |
| Eubacteria | True bacteria; common in soil, water, living hosts | Escherichia coli, Cyanobacteria |
The classification of Monera helps understand microbial diversity and adaptation, which is essential for applications in medicine and environmental science.
Monera Questions With Answers: MCQs and Explanations
Practicing Monera Questions With Answers MCQs enables students to test their knowledge and learn key biological facts. Below are some MCQs with answers and explanations relevant to board and entrance exams.
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Which of the following statements about chemosynthetic bacteria are true?
A. They recycle nutrients like nitrogen and sulfur
B. They are heterotrophic
C. They release energy by oxidizing organic substances
D. They contribute to nutrient cycling
Answer: A and D
Explanation: Chemosynthetic bacteria are autotrophic and play an important role in the recycling of nutrients. -
Which statement about Mycoplasma is correct?
A. Mycoplasma can pass through less than one micron filter size
B. Mycoplasma has a cell wall
Answer: A is correct; B is incorrect.
Explanation: Mycoplasma lacks a cell wall, making it unique among bacteria. -
Bacteria with a tuft of flagella at one pole are called:
A. Monotrichous
B. Amphitrichous
C. Lophotrichous
D. Peritrichous
Answer: C. Lophotrichous
Explanation: Lophotrichous bacteria possess a cluster of flagella at one end, aiding in motility. -
Which is the major component giving rigidity to the eubacterial cell wall?
A. Cellulose
B. Peptidoglycan
C. Chitin
D. Glycogen
Answer: B. Peptidoglycan
Explanation: The peptidoglycan or murein layer provides structural support in most bacteria.
Find more challenging questions with detailed diagrams and notes in our cell biology MCQs section.
Common Monera Questions With Answers Examples
Below are typical examples of Monera Questions With Answers encountered in exams. These questions cover structure, function, and ecological significance.
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What are the types of nutritional modes found in bacteria?
Answer: Bacteria can be autotrophic (photosynthetic or chemosynthetic) or heterotrophic (saprophytic, parasitic or symbiotic). -
Explain binary fission in bacteria.
Answer: Binary fission is an asexual process in which a bacterial cell divides into two identical daughter cells. -
State one key difference between archaebacteria and eubacteria.
Answer: Archaebacteria have unique membrane lipids, whereas eubacteria have peptidoglycan in their cell wall. -
Describe the oxygenic vs. anoxygenic photosynthesis in Monera.
Answer: Cyanobacteria perform oxygenic photosynthesis, releasing oxygen, while some bacteria use anoxygenic photosynthesis, not producing oxygen.
To understand more about microbial roles in ecosystems, explore biogeochemical cycles and their importance for nature.
Monera Questions With Answers: Diagrams and Illustrations
Illustrations are vital in clarifying Monera Questions With Answers, especially for bacterial cell structure and flagellar arrangement. For instance:
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Bacterial Cell Structure Diagram:
- Labelled parts: cell membrane, cell wall, nucleoid, ribosomes, cytoplasm, flagella.
- Flagella arrangements: monotrichous (single flagellum), lophotrichous (tuft), amphitrichous (both poles), peritrichous (all around).
For stepwise diagram-based explanations, check our class 7 important biology diagrams resource.
Short Notes on Monera Questions With Answers
Monera Questions With Answers notes provide concise information for rapid revision:
- Bacteria are the most abundant prokaryotes, found in diverse habitats.
- Cell walls contain peptidoglycan (in eubacteria) or may be absent (as in Mycoplasma).
- Bacterial reproduction is mainly by binary fission.
- Nutritional modes include heterotrophy and autotrophy (photosynthetic or chemosynthetic).
- Conjugation, transformation, and transduction are genetic exchange processes in bacteria.
For further reading on the diversity of metabolic pathways, explore biomolecules and their roles.
Applications and Importance in Real Life
Monera Questions With Answers are critical in fields such as medicine (antibiotics, pathogenic bacteria), environment (nutrient cycling), agriculture (biofertilizers), and biotechnology (genetic manipulation). Their study helps solve pressing real-world problems, including disease management and sustainable farming practices.
Understanding Monera also links to broader biological systems. For example, differences in acquired and inherited traits affect both microbial and human populations. For more on this, visit our guide on genetic traits.
Page Summary
Monera Questions With Answers provide clear explanations, definitions, diagrams, and examples to aid exam success. Covering everything from classifications to real-world significance, this resource ensures students gain confidence in understanding Monera. Dive into the details to strengthen your biology foundation with Vedantu's rich set of interactive learning tools and explanations.
FAQs on Monera Questions With Answers – MCQ and Diagram Review
1. What is Monera?
Monera is a biological kingdom consisting of unicellular and prokaryotic organisms.
- Includes bacteria and cyanobacteria
- Cells lack a true nucleus and membrane-bound organelles
- Reproduce mainly by binary fission
- Found in diverse habitats such as soil, water, and inside living organisms
2. What are the characteristics of Monera?
The main characteristics of Monera are:
- Unicellular and prokaryotic cell structure
- No true nucleus, DNA is present in a nucleoid
- No membrane-bound organelles
- Reproduce asexually (mainly by binary fission)
- Cell wall present (in most)
- Habitats include extreme environments
3. Name two examples of Monera.
Two common examples of Monera are:
- Escherichia coli (E. coli) – a type of bacteria found in the intestines
- Spirulina – a cyanobacterium used as a dietary supplement
4. What is the cell structure of organisms in Monera?
Organisms in Monera have a simple, prokaryotic cell structure.
- Lack a true nucleus; DNA is circular and present in the nucleoid
- No membrane-bound organelles like mitochondria or chloroplasts
- Cell wall is present in most Monerans
- Some have flagella for movement
5. How do Monerans reproduce?
Monerans mainly reproduce asexually by binary fission.
- Parent cell divides into two identical daughter cells
- Some bacteria also show spore formation under adverse conditions
6. What are the economic importance of Monera?
Organisms in Monera are economically important in various ways:
- Bacteria help in decomposition and nutrient recycling
- Used in fermentation (curd, cheese, vinegar)
- Nitrogen-fixing bacteria enrich soil fertility
- Some cause diseases, but others are used in medicine (antibiotics production)
7. Differentiate between Monera and Protista.
The main differences between Monera and Protista are:
- Monera: Prokaryotic, unicellular, no true nucleus
- Protista: Eukaryotic, mostly unicellular, true nucleus present
- Monera: No membrane-bound organelles
- Protista: Have membrane-bound organelles
8. What are the major subgroups of Monera?
Monera is mainly divided into two subgroups:
- Archaebacteria – found in extreme environments (hot springs, salty lakes)
- Eubacteria – true bacteria, found in soil, water, and living organisms
- Both differ in cell wall structure and metabolism
9. What is the function of cyanobacteria in Monera?
Cyanobacteria, also called blue-green algae, perform key ecological functions:
- Carry out photosynthesis to produce oxygen
- Some fix atmospheric nitrogen, enriching soil fertility
- Form blooms in water bodies under certain conditions
10. Why is Monera called prokaryotic?
Monera is called prokaryotic because its organisms lack a true nucleus and membrane-bound organelles. Their genetic material is not enclosed within a nuclear membrane, setting them apart from eukaryotes.
11. What is the role of Monera in nitrogen fixation?
Certain Monerans, such as Rhizobium and cyanobacteria, fix atmospheric nitrogen, converting it into usable forms for plants. This process helps maintain soil fertility and supports plant growth.
12. What diseases are caused by Monera?
Monera includes bacteria that cause various diseases.
- Tuberculosis (by Mycobacterium tuberculosis)
- Cholera (by Vibrio cholerae)
- Typhoid (by Salmonella typhi)
- Pneumonia (by Streptococcus pneumoniae)
