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 22 of 27
- A. A
- B. B
- C. C
- D. D
Explanation: Structure X is pilus. Bacteria possessing the F plasmid are designated as F+.
Correct answer: B- A. Bacteria that thrive in high-temperature environments like hot springs
- B. Cyanobacteria play an important role in nitrogen fixation
- C. The bacterial species Salmonella typhi causes typhoid in humans
- D. Bacteria in the large intestine of humans synthesize vitamins
Explanation: The correct answer is Option A:Bacteria that thrive in high-temperature environments like hot springsThermophilic bacteria are known for…
Correct answer: Bacteria that thrive in high-temperature environments like hot springs- A. Photoautotrophs
- B. Chemoautotrophs
- C. Photoheterotrophs
- D. Chemoheterotrophs
Explanation: Decomposers play a crucial role in ecosystems by breaking down dead organic material and recycling nutrients.
Correct answer: Chemoheterotrophs- A. Sycon
- B. Green algae
- C. Zooflagellates
- D. Archaebacteria
Explanation: Archaebacteria are a group of microorganisms that are well-known for their ability to thrive in extreme environments, such as those found…
Correct answer: Archaebacteria- A. Monotrichous
- B. lopotrichous
- C. peritrichous
- D. monopolar bitrichous
Explanation: The lophotrichous bacteria have several flagella located at the same place on their surface.
Correct answer: lopotrichous- A. Transformation
- B. Transduction
- C. Conjugation
- D. Translation
Explanation: The process of absorption of DNA into the cell from its immediate environment is called transformation.As a result cell is transformed…
Correct answer: Transformation- A. Amphitrichous
- B. Lophotrichous
- C. Peritrichous
- D. Monotrichous
Explanation: Amphitrichous refers to a type of bacterial flagellation where a single flagellum is present at both ends of the cell.
Correct answer: Amphitrichous- A. Spirochete
- B. Seudomonas
- C. E.coli
- D. Campylobacter
Explanation: Campylobacter is a genus of bacteria that are mostly microaerophilic, i.e. they require a very low concentration of oxygen to survive.
Correct answer: Campylobacter- A. Prokaryotes generate sodium gradients across their nuclear membranes
- B. Prokaryotes do not generate energy
- C. Prokaryotes produce energy via photosynthesis
- D. Prokaryotes generate proton gradients across their plasma membranes
Explanation: Although prokaryotes lack mitochondria and other membrane-bound organelles, they are able to generate a proton gradient across their cell…
Correct answer: Prokaryotes generate proton gradients across their plasma membranes- A. Coccus
- B. Vibrio
- C. Spirillum
- D. Bacillus
Explanation: Option C is correct as bacteria classified as "spirillum" are spiral in shape.
Correct answer: Spirillum431. Which of the following structure primarily helps in attachment of bacteria on various surfaces?
- A. Pilli
- B. Flagella
- C. Both A and B
- D. None of these
Explanation: Flagella help in locomotion whereas pilli help in attachment.
Correct answer: Pilli- A. Gram-positive
- B. Both Gram-positive and Gram-negative
- C. Gram-negative
- D. Capsule
Explanation: If lipopolysaccharides (LPS) did not appear in the wall of bacteria on staining, it would be known as Gram-positive bacteria
Correct answer: Gram-positive- A. Peptidoglycans
- B. Flagellin
- C. Bacteriorhodopsin
- D. Chitin
Explanation: Chitin is found in fungal cell walls 1 arthropod exoskeletons, not in bacteria or archaea, whereas peptidoglycan, flagellin, and…
Correct answer: Chitin- A. Single cell
- B. Chain of bacilli
- C. Pairs of bacilli
- D. All of Above
Explanation: It is a genus of facultatively anaerobic gram-negative rod-shaped bacteria (family Fusobacteriaceae) in which the individual cells are…
Correct answer: Chain of bacilli- A. Plasmid
- B. Nucleotide
- C. Mesosomes
- D. All of these
Explanation: Plasmids often contain drug-resistant, heavy metals, disease, and insect-resistant genes on them.
Correct answer: Plasmid- A. Cell membrane
- B. Chromatin
- C. Ribosome
- D. Capsule
Explanation: Not all bacteria have capsules present. They all have a slime layer but this is only classified as a capsule when visible under the…
Correct answer: Capsule- A. Readily incorporate cloned DNA
- B. Capable of autonomous replication
- C. Capable of being isolated from genomic DNA
- D. All of these
Explanation: All of these characteristics collectively make plasmid DNA a valuable tool for researchers, as they enable the introduction, replication…
Correct answer: All of these- A. Heterotrophic bacteria
- B. Saprotrophic bacteria
- C. Chemosynthetic bacteria
- D. Parasitic bacteria
Explanation: Parasitic bacteria are those which obtain nutrients from the host they live on, they rely on the host for their food.
Correct answer: Parasitic bacteria- A. Bacilli
- B. Strephylobaccilus
- C. Bacillus
- D. Diplobacilli
Explanation: A. Rod shaped bacteria (plural)B. Chain of bacilliD. Pair arrangement
Correct answer: Bacillus- A. Mesosome
- B. Ribosomes
- C. Golgi bodies
- D. Mitochondria
Explanation: The correct answer is 'Ribosomes.' In bacteria, which are prokaryotic organisms, ribosomes are present and essential for protein…
Correct answer: Ribosomes