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100+ Free CHSE Odisha Voc. Microbiology & Serology Practice Questions

Council of Higher Secondary Education, Odisha (CHSE Odisha) Higher Secondary (+2) Vocational Stream — Microbiology and Serology (Group B Health and Paramedical trade subject) practice questions are available now; exam metadata is being verified.

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2026 Statistics

Key Facts: CHSE Odisha Voc. Microbiology & Serology Exam

Group B trade

Health and Paramedical vocational subject under CHSE Odisha

CHSE Vocational Courses Part-1-1 contents

Part-1-1

Official vocational courses PDF listing Microbiology & Serology

chseodisha.nic.in Part-1-1.pdf

Mixed assessment

Theory plus practical skills—not a pure MCQ board paper

CHSE vocational scheme of studies

Core units

Microbes, sterilisation, media, serology, safety, parasites/viruses

CHSE Microbiology and Serology syllabus outline

In AHSE fee

No separate trade marketplace fee; included in session exam fee

CHSE Odisha fee/form-fill-up practice via colleges

CHSE Odisha Vocational Microbiology and Serology is a +2 Group B health/paramedical trade with mixed theory+practical assessment covering microbes, sterilisation, media, serology principles, and lab safety—not a pure MCQ board paper. This free 2026 bank is an English MCQ study adaptation aligned to Part-1-1 syllabus themes.

Sample CHSE Odisha Voc. Microbiology & Serology Practice Questions

Try these sample questions to test your CHSE Odisha Voc. Microbiology & Serology exam readiness. Each question includes a detailed explanation. Start the interactive quiz above for the full 100+ question experience with AI tutoring.

1In medical microbiology, the term microorganism primarily refers to:
A.Microscopic living agents such as bacteria, fungi, protozoa, and viruses studied in the laboratory
B.Only large multicellular plants and animals visible without magnification
C.Only non-living chemical reagents used in staining
D.Only laboratory glassware and plasticware
Explanation: Microbiology studies microscopic life and related agents (bacteria, fungi, protozoa, viruses) that can cause or interact with disease and are investigated in clinical labs.
2Bacteria are best classified as:
A.Eukaryotic organisms with a true nucleus and mitochondria
B.Prokaryotic unicellular organisms lacking a membrane-bound nucleus
C.Non-cellular infectious proteins only
D.Multicellular plants with chlorophyll
Explanation: Bacteria are prokaryotes: they lack a membrane-bound nucleus and typically have a cell wall and circular DNA, distinguishing them from eukaryotic fungi and protozoa.
3Which structure is essential for bacterial classification by Gram staining reaction?
A.Mitochondrial membrane thickness
B.Nuclear membrane pore size
C.Cell-wall peptidoglycan organisation and outer membrane presence
D.Chloroplast grana stacking
Explanation: Gram reaction depends on cell-wall architecture: thick peptidoglycan retains crystal violet–iodine (Gram-positive), while Gram-negative walls have thinner peptidoglycan plus an outer membrane and lose the complex on decolourisation.
4Nutritional growth of bacteria on culture media requires, at minimum:
A.Only pure oxygen and no nutrients
B.Only light and chlorophyll for all bacterial species
C.Only solid glass without any water
D.A carbon/energy source, nitrogen source, water, essential ions, and suitable temperature and pH
Explanation: Bacterial growth needs water, carbon and energy sources, nitrogen and minerals, and environmental conditions (temperature, pH, atmosphere) suited to the organism.
5Bacterial generation time is defined as:
A.The shelf life of unused Petri dishes only
B.The incubation time of an autoclave cycle
C.The time required for a bacterial population to double under given conditions
D.The time a stain must dry on a slide
Explanation: Generation (doubling) time is how long one cell takes to become two under stated conditions; it varies widely among species and media.
6Plasmid-mediated drug resistance in bacteria is important because plasmids can:
A.Eliminate the need for aseptic technique
B.Carry resistance genes that may transfer between bacteria, spreading antimicrobial resistance
C.Replace the need for a cell wall entirely in all species
D.Convert all bacteria into viruses
Explanation: Plasmids often carry antimicrobial-resistance genes and can transfer by conjugation (and other mechanisms), contributing to spread of resistance in clinical isolates.
7Pathogenicity of a bacterium refers to:
A.Its ability to cause disease in a susceptible host
B.Only its colour on nutrient agar
C.Only the brand of incubator used
D.Only the cost of the culture media
Explanation: Pathogenicity is the capacity to produce disease; virulence is the degree of that capacity. Colour, equipment brand, and media cost are not definitions of pathogenicity.
8Which statement best distinguishes colonisation from infection?
A.Colonisation always means septic shock
B.Infection never involves any host response
C.The two terms are identical in every textbook
D.Colonisation is presence/growth of microbes without tissue invasion and disease; infection involves host damage or clinical disease
Explanation: Colonisation is microbial presence without disease; infection implies invasion/host response and clinical or pathological damage. The distinction guides interpretation of culture results.
9Cocci are bacteria that are:
A.Always filamentous fungi
B.Always acid-fast bacilli only
C.Spherical or nearly spherical in shape
D.Always spiral with axial filaments only
Explanation: Morphologically, cocci are round bacteria (e.g., staphylococci in clusters, streptococci in chains). Spirals, moulds, and AFB describe other forms.
10Bacilli are bacteria that are typically:
A.Visible only with the naked eye as multicellular worms
B.Rod-shaped
C.Perfectly spherical in all cases
D.Without any cell wall in Gram-positive genera
Explanation: Bacilli are rod-shaped bacteria (e.g., Escherichia coli, Bacillus, Clostridium). Cocci are spherical; worms are multicellular parasites.

About the CHSE Odisha Voc. Microbiology & Serology Practice Questions

Verified exam format metadata for Council of Higher Secondary Education, Odisha (CHSE Odisha) Higher Secondary (+2) Vocational Stream — Microbiology and Serology (Group B Health and Paramedical trade subject) is pending. The practice questions above remain available while official exam length, timing, passing score, fee, and administrator details are reviewed.