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 9 of 27
- A. Microbistatic approach
- B. Microbicidal approach
- C. Bactericidal approach
- D. Antenatal approach
Explanation: Reproductive capacities of the cells are inhibited and the population of microbes is maintained at constant size by microbistatic.
Correct answer: Microbistatic approach- A. Robert Koch
- B. Antonie van Leeuwenhoek
- C. Robert Hooke
- D. Robert Brown
Explanation: Proposing the germ theory of disease was the crowning achievement of the French scientist Robert Koch.
Correct answer: Robert Koch- A. Cocci
- B. Bacilli
- C. Spirilla
- D. None of these
Explanation: Bacteria are classified according to their shape, or morphology. Spherical bacteria are known as cocci, rod-shaped bacteria are bacilli…
Correct answer: Bacilli- A. Both processes produce four haploid cells
- B. Both processes are a form of asexual reproduction.
- C. Both processes involve genetic recombination
- D. None of these
Explanation: This means that they both involve the mixing of genetic material from two different cells.
Correct answer: Both processes involve genetic recombination- A. Vinegar
- B. Saliva
- C. Rain water
- D. All of Above
Explanation: Correct option is C. Anton Van Leeuwenhoek is known as the father of microbiology due to his findings with his novel microscopes.
Correct answer: Rain water- A. Staphylococci
- B. Pseudomunas
- C. Diplococcus pneumonia
- D. Mycoplasmas
Explanation: Correct option is D. Examples of bacteria that lack a cell wall are Mycoplasma and L-form bacteria.
Correct answer: Mycoplasmas- A. Cellulose
- B. Chitin
- C. Silica waxes and lignin
- D. Peptidoglycan or murein
Explanation: Prokaryotic cell wall; It lacks cellulose. Its strengthening material is peptidoglycan or murein.
Correct answer: Peptidoglycan or murein- A. Transduction
- B. Transformation
- C. Binary Fission
- D. Conjugation
Explanation: Option B is correct since the transformation is the process of transmitting genetic information from one bacterium to another bacterium…
Correct answer: Transformation- A. 20 to 2000 times
- B. 10 to 1000 times
- C. 500 times
- D. 3000 times
Explanation: Viruses are 10 to 1000 times smaller than the smallest bacteria. The smallest bacteria, mycoplasma has a size of approximately 0.2 - 0.3 μm.
Correct answer: 10 to 1000 times- A. Both B and D
- B. Facultative anaerobe
- C. Constitutive aerobe
- D. Obligate anaerobe
Explanation: Obligate Anaerobe organisms cannot survive in the presence of oxygen. It lacks the necessary enzymes and metabolic pathways to utilize…
Correct answer: Obligate anaerobe- A. Microbiology and Genetics
- B. Genetics and Medicines
- C. Microbiology and Medicines
- D. Pathology and Genetics
Explanation: A. Microbiology and Genetics (Incorrect): Louis Pasteur's major discoveries were in microbiology and not specifically in genetics. B.
Correct answer: Microbiology and Medicines- A. Tetrad
- B. Sarcina
- C. Grape like clusters
- D. All of the above options are correct
Explanation: Option A; cells in a square arrangement, tetrads.Option B: The cocci are arranged in a cuboidal manner, as the cells are formed by regular…
Correct answer: Sarcina- A. Escherichia coli
- B. Mycoplasma
- C. Epulopiscium
- D. Spirochetes
Explanation: Some spirochetes occasionally reach 500 micrometres in length.
Correct answer: Spirochetes- A. Purple
- B. Red
- C. Pink
- D. Blue
Explanation: Gram-positive bacteria are bacteria with thick cell walls. In a Gram stain test, these organisms yield a positive result.
Correct answer: Purple- A. Cowpox
- B. Smallpox
- C. Rabies
- D. HIV
Explanation: In summary, Louis Pasteur discovered the vaccine against rabies (option C), making a groundbreaking contribution to the field of…
Correct answer: Rabies- A. Lactic acid
- B. Urea
- C. Ammonia
- D. Uric acid
Explanation: Lactic acid is indeed a common waste product produced by certain bacteria, particularly lactic acid bacteria, during a specific metabolic…
Correct answer: Lactic acid- A. Edward Jenner
- B. Leeuwenhoek
- C. Alexander Fleming
- D. Louis Pasteur
Explanation: Louis Pasteur developed a vaccine for anthrax in 1881. So opt D is correct.
Correct answer: Louis Pasteur- A. 50S+40S
- B. 60S+40S
- C. 80S
- D. 70S
Explanation: Is wrong because in eukaryotes 40S and 60S subunit s of ribosomes combine to form single subunit 80S
Correct answer: 70S- A. Anaerobic
- B. Facultative anaerobic
- C. Aerobic
- D. Obligate aerobic
Explanation: Option B is correct. E. coli is classified as a facultative anaerobe. It uses oxygen and grows by aerobic respiration when it is present…
Correct answer: Facultative anaerobic- A. Basal body
- B. Cell membrane
- C. Cell wall
- D. Capsule
Explanation: Option A is correct as cilia and flagella originate from their basal bodies embedded in the cytoplasm.
Correct answer: Basal body