Free Kingdom Prokaryotae MCQs with Answers
533 Kingdom Prokaryotae MCQs from Biology, each with the correct answer and a written explanation of why it is correct. Free and unlimited, with no account needed.
Kingdom Prokaryotae includes bacteria and cyanobacteria, organisms with no membrane-bound nucleus or membrane-bound organelles. It covers their cell wall, capsule, flagella, plasmids, forms of nutrition, binary fission, useful and harmful roles, and the differences between prokaryotic cells and eukaryotic cells.
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533 questions · page 7 of 27
- A. Cocci
- B. Vibrio
- C. Spirillum
- D. Bacilli
Explanation: This option is correct because Spirilla (singular, Spirillum) are a group of bacteria characterized by a corkscrew (spiral) appearance.
Correct answer: Spirillum- A. Flagellated bacteria can detect chemicals
- B. The flagellated bacteria moves in response to a chemical signal
- C. Help in motility
- D. On some bacteria, flagella have a role in immunity
Explanation: The primary function of flagella is to aid in the motility of bacteria, allowing them to move through liquid environments.
Correct answer: Help in motility- A. Heterotrophs
- B. Saprotrophic
- C. Parasitic
- D. Autotrophic
Explanation: This option is correct because Saprotrophic bacteria. known as saprophytic bacteria, are a subset of heterotrophic. bacteria.
Correct answer: Saprotrophic- A. Anaerobes
- B. Molds
- C. Aerobes
- D. Yeasts
Explanation: This option is correct because Anaerobic bacteria are microorganisms that can grow and thrive in the absence of oxygen.
Correct answer: Anaerobes- A. Immunization
- B. Sterilization process
- C. Vaccination
- D. Chemical methods
Explanation: This option is correct because Sterilization is the process of using physical or chemical methods to completely eliminate or kill all…
Correct answer: Sterilization process- A. Cell membrane
- B. Capsule
- C. Cell wall
- D. Slime
Explanation: The cell wall is the structure responsible for giving shape to bacterial cells is a rigid layer that surrounds the cell membrane and…
Correct answer: Cell wall- A. Peptidoglycan
- B. rRNA
- C. Histones
- D. Teichoic acid
Explanation: This option is correct because bacteria do not have histones. In contrast to sukaryotic cells, bacterial DNA is not wrapped around…
Correct answer: Histones128. A slippery outer covering in some bacteria that protects them from phagocytosis by host cells is:
- A. Flagellum
- B. Cell wall
- C. Peptidoglycan
- D. Slime
Explanation: The slime layer is a slimy, gelatinous outer covering that surrounds some bacterial cells.
Correct answer: Slime- A. Ribosomes
- B. Plasmids
- C. Mitochondria
- D. Spores
Explanation: Spores are specialized structures produced by certain bacteria, fungi, and other organisms during unfavorable conditions.
Correct answer: Spores- A. Vesicles
- B. Tubules
- C. Lamellae
- D. Squares
Explanation: Squares are not a recognized form of mesosomes. Mesosomes typically exhibit vesicular, tubular, or lamellar shapes but squares are not a…
Correct answer: Squares- A. Plasmid
- B. Mesosome
- C. Nucleoid
- D. Ribosome
Explanation: Plasmids are important vectors in modern genetic engineering. A plasmid is a small, circular DNA molecule that can raplicate independently…
Correct answer: Plasmid- A. Pilin
- B. Tubulin
- C. Flagellin
- D. Myosin
Explanation: Pili, also known as fimbriae are thin, hair-like structures found on the surface of many bacteria.
Correct answer: Pilin- A. Tetrad
- B. Sarcina
- C. Diplococcus
- D. Streptococci
Explanation: A tetrad refers to the arrangement of four cocci in pairs of two, forming two sets of pairs atright angles to each other.
Correct answer: Tetrad- A. Spirochete
- B. Nostoc
- C. Water blooms
- D. Cyanobacteria
Explanation: This option is comact because syphilis is caused by Treponema pallidum, a bacterium that belongs to the spirochete group.
Correct answer: Spirochete- A. Fimbriae
- B. Nucleoid
- C. Mesosome
- D. Endospore
Explanation: Mesosomes are invaginations or infoldings of the cell. membrane in certain bacterial cells.
Correct answer: Mesosome- A. Chemotherapy
- B. Sterilization
- C. Antisepsis
- D. Vaccination
Explanation: An attenuated vaccine consists of live, whole bacterial celis viral particles that are treated in such a way that they have reduced…
Correct answer: Vaccination- A. Mycoplasmas
- B. Gram-negative bacteria
- C. Gram-positive bacteria
- D. Archaebacteria
Explanation: CV-1 complex is formed and retained during Gram staining in Gram-positive bacteria.
Correct answer: Gram-positive bacteria- A. It arises from the basal body
- B. It is involved in chemotaxis
- C. It is proteinaceous in nature
- D. It is responsible for conjugation
Explanation: This option is incorrect because the bacterial flagellum is not responsible for conjugation.
Correct answer: It is responsible for conjugation- A. Penicillium
- B. Bacterium
- C. Adiantum
- D. Polytrichum
Explanation: Bacteria have cell walls that contain peptidoglycan, a unique structural molecule that distinguishes them from fungi, plants and other…
Correct answer: Bacterium- A. Gram-positive
- B. Gram-negative
- C. Cellulose
- D. Acid fast
Explanation: This is the correct option because cyanobacteria have a cell wall structure characteristic of Gram-negative bacteria.
Correct answer: Gram-negative