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 13 of 27
- A. Increase pathogenicity of bacteria
- B. Degrade host plasma membrane
- C. Degrade host enzymes
- D. Exchange of genetic material
Explanation: Pili (singular: pilus) arehair-like appendages found on the surface of some bacterial cells.
Correct answer: Exchange of genetic material- A. 1
- B. 2
- C. 3
- D. 4
Explanation: In Gram-positive bacteria, there is only one major layer in the cell wall, while Gram-negative bacteria have two major layers in the cell…
Correct answer: 1- A. Cell wall
- B. Capsule
- C. Cell wall & slime
- D. Slime
Explanation: The bacterial cell wall is a rigid structure that provides structural support and helps maintain the shape of the bacterial cell.
Correct answer: Cell wall- A. Diplococcus pneumoniae
- B. Hyphomicrobium
- C. Escherichia coil
- D. Pseudomonas
Explanation: Hyphomicrobium is a genus of bacteria that exhibits a spiral or helical shape. It is known for its spiral or curved rod morphology.
Correct answer: Hyphomicrobium- A. Tincture of Iodine
- B. Potassium Permanganate
- C. Mercuric Chloride
- D. Hydrogen Peroxide
Explanation: **Tincture of iodine** (option A) is not typically used as a disinfectant to control bacterial growth.
Correct answer: Tincture of Iodine- A. 1
- B. 2
- C. 3
- D. 4
Explanation: In Gram-positive bacteria, there is only one major layer in the cell wall while hgram negative bacteria has two major layers.
Correct answer: 1- A. Lipids
- B. Carbohydrates
- C. Nucleotide
- D. Alcohol
Explanation: Option B is correct.The capsule of a bacterial cell is a sticky gelatinous structure made up of carbohydrates.
Correct answer: Carbohydrates- A. Autotrophs
- B. Decomposers
- C. Parasites
- D. Photosynthetic
Explanation: Option B is correct.Saprophytic bacteria are decomposers. Decomposers are organisms that break down dead organic matter.
Correct answer: Decomposers249. Salmonella typhi causing typhoid and Clostridium tetani causing tetanus are which type of bacteria?
- A. Bacilli
- B. Spirilla
- C. Cocci
- D. Comma
Explanation: Option A is correct.Salmonella typhi and Clostridium tetani are both bacilli. Bacilli are rod-shaped bacteria.
Correct answer: Bacilli- A. Dry Heat
- B. Moist Heat
- C. Filtration
- D. Ultraviolet Radiation
Explanation: This is the correct answer. Dry heat is a method of sterilization that involves exposing microorganisms, including bacteria, to high…
Correct answer: Dry Heat- A. 1-2 weeks
- B. 2-3 weeks
- C. 3-4 weeks
- D. 7 days
Explanation: The incubation period of syphilis, which is the time between exposure to the bacteria (Treponema pallidum) and the appearance of symptoms…
Correct answer: 2-3 weeks- A. Teichoic acids
- B. Lipids
- C. Peptidoglycan
- D. Periplasmic space
Explanation: Teichoic acids are unique components found only in the cell walls of Gram-positive bacteria.
Correct answer: Teichoic acids- A. Capsulated and S-Type
- B. Non-capsulated and S-Type
- C. Capsulated and R-Type
- D. Non-capsulated and R-Type
Explanation: Streptococcus pneumoniae strains are classified into two main types based on their capsule:- S-type (Smooth-type): Capsulated, virulent…
Correct answer: Non-capsulated and R-Type- A. Capsule
- B. Slime
- C. Glycocalyx
- D. Spore
Explanation: The capsule is an additional covering that surrounds the cell wall of some bacteria, providing protection against:- Phagocytosis…
Correct answer: Capsule- A. Transduction
- B. Transformation
- C. Conjugation
- D. Both a and b
Explanation: Conjugation is the process of genetic exchange between bacteria that involves direct cell-to-cell contact between the bacterial cells.
Correct answer: Conjugation- A. Protista
- B. E.coli
- C. Amoeba
- D. Fungi
Explanation: E. coli (Escherichia coli) is a type of bacteria, which is a prokaryote.
Correct answer: E.coli- A. A reproductive process
- B. A vegetative process
- C. Can be reproductive or vegetative depending on the conditions
- D. Is related to invading host cells
Explanation: Endospore formation is a survival mechanism used by certain bacteria, such as Bacillus and Clostridium species, to withstand harsh…
Correct answer: A vegetative process- A. Phenol
- B. Spirit
- C. Pencilin
- D. Sulphuric Acid
Explanation: Correct, as it is an antibiotic that inhibits bacterial cell wall synthesis.
Correct answer: Pencilin- A. Mitochondria
- B. Nucleus
- C. Golgi apparatus
- D. Ribosomes
Explanation: Ribosomes - Correct. Prokaryotic cells have ribosomes (70S type) for protein synthesis, though they are smaller than eukaryotic ribosomes.
Correct answer: Ribosomes- A. Green
- B. Blue
- C. Yellow
- D. Red
Explanation: Blue - Correct. Phycocyanin is a blue pigment found in cyanobacteria that assists in photosynthesis.
Correct answer: Blue