16 Questions
What is the characteristic of bacteria that distinguishes it from other microorganisms?
Absence of a nuclear membrane
Which of the following is a role of bacteria in human life?
Aiding in digestion
What is the primary characteristic of fungi?
Rigid cell walls
What distinguishes fungi from bacteria?
Cell wall composition
Which type of microorganism contains DNA within a nuclear membrane?
Fungi
What is the primary reason for most fungal infections in humans?
Weakened host immune defenses
Which of the following characteristics is common to all fungi?
Reproduction through both sexual and asexual means
What is the main mode of growth for most microalgae?
Autotrophic growth through photosynthesis
Which characteristic defines viruses as infectious agents with non-living characteristics?
Metabolism carried out independently
What is a defining feature of protozoa?
Presence of mitochondria in all cases
What role do beneficial microbes play in biodegradation?
Contributing to the breakdown of organic matter
What determines the pathogenicity of microorganisms?
Nature and type of virulence factors
How are Gram-positive and Gram-negative bacteria classified based on their cell wall structure?
By the thickness of the peptidoglycan layer in the cell wall
What makes up around 90% of the dry weight of Gram-positive bacterial cell wall?
Polysaccharides
What is the role of microorganisms in bioremediation?
Breakdown of organic pollutants or contaminants
What distinguishes cyanobacteria from other microalgae?
Conversion of sunlight into energy through photosynthesis
Explore the classification of microscopic organisms like bacteria, viruses, archaea, algae, fungi, and protozoa. Understand the types and characteristics of these microorganisms.
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