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 14 of 27
- A. Mesosome
- B. Periplasm
- C. Ribosome
- D. Plasmid
Explanation: Mesosome - Correct. In prokaryotic cells, mesosomes are infoldings of the plasma membrane that perform functions similar to mitochondria…
Correct answer: Mesosome- A. Chemicals
- B. Drying
- C. Heat
- D. Radiation
Explanation: Radiation - Correct. Gamma or UV radiation is used to sterilize blood products without damaging them.
Correct answer: Radiation- A. Pili
- B. Membrane
- C. Flagella
- D. Tentacle
- E. Cilia
Explanation: The thin appendages that help bacteria in conjugation are pili. So option A is the correct answer.
Correct answer: Pili- A. Bacilli
- B. Trichomonas
- C. Neisseria gonorrhea
- D. Genital herpes
- E. Treponema palladium
Explanation: The correct answer is Option E. Syphilis is caused by a bacterium called Treponema pallidum.
Correct answer: Treponema palladium- A. CO2
- B. H2S
- C. S
- D. H
- E. O
Explanation: In sulfur photosynthetic bacteria, the substance that donates hydrogen is hydrogen sulfide (H2S) and not water.
Correct answer: S- A. Lophotrichous
- B. Peritrichous
- C. Atrichous
- D. Monotrichous
- E. Diplotrichous
Explanation: Peritrichous bacteria are those that have flagella distributed all over their surface.
Correct answer: Peritrichous- A. Lysosomes
- B. Mesosomes
- C. Golgi bodies
- D. Phragmoplasts
Explanation: Mesosomes are the structures formed by invagination of the plasma membrane and have been associated with cell division and DNA replication…
Correct answer: Mesosomes- A. Chitin
- B. Murein
- C. Cellulose
- D. Hemicellulose
Explanation: Murein, also known as peptidoglycan, is the main component of bacterial cell walls.
Correct answer: Murein- A. One
- B. Two
- C. Three
- D. Four
Explanation: The Gram-negative cell wall consists of 2 interconnected layers of peptidoglycan surrounded by an outer membrane.
Correct answer: Two- A. Alcohol, acetic acid and lactic acid
- B. Alcohol, potassium and sulphur
- C. Alcohol, glycogen and phosphate
- D. Glycogen, fat and potassium
Explanation: Prokaryotes mostly keep Alcohol, lactic acid and acetic acid as wastes. Thus, option A is appropriate.
Correct answer: Alcohol, acetic acid and lactic acid- A. Parasitic bacteria
- B. Saprophytic bacteria
- C. Symbiotic bacteria
- D. Photosynthetic bacteria
Explanation: Saprophytic bacteria are called scavengers of earth because these bacteria decompose dead organic matter and obtain nutrients from…
Correct answer: Saprophytic bacteria- A. Condensed
- B. Thick
- C. Moderate
- D. Thin
- E. Entangled
Explanation: In gram-negative bacteria, the peptidoglycan layer is relatively thin compared to gram-positive bacteria.
Correct answer: Thin- A. Norcardia salmonicolor
- B. Hydrogenomonas
- C. Pseudomonas
- D. Thiobacillus
- E. Azobacter
Explanation: The correct answer is Pseudomonas because some species within this genus have the unique ability to oxidize carbon monoxide (CO) as a…
Correct answer: Pseudomonas- A. Flagellated rod-shaped bacterium
- B. Flagellated chain bacterium
- C. Flagellated spiral-shaped bacterium
- D. Non-flagellated spiral-shaped bacterium
- E. Non-flagellated rod-shaped bacterium
Explanation: Helicobacter pylori is a flagellated spiral-shaped bacterium. Its spiral shape and flagella help it move through the mucus lining of the…
Correct answer: Flagellated spiral-shaped bacterium- A. Aerobic
- B. Anaerobic
- C. Facultative
- D. Microaerophill
Explanation: Aerobic organisms are microorganisms and other living beings that require oxygen for their survival and growth.
Correct answer: Aerobic- A. After fertilization of gametes
- B. Before spore formation
- C. During binary fission
- D. After binary fission
Explanation: The circular bacterial genome is replicated. The process begins at the origin of replication, where the DNA unwinds and new complementary…
Correct answer: During binary fission- A. Made up of microfilaments
- B. Contains centriole
- C. Originates from basal bodies
- D. They are immotile
Explanation: Flagella originate from basal bodies, which are protein structures located at the base of these appendages.
Correct answer: Originates from basal bodies- A. Has a short dormant period
- B. Contains moisture for survival
- C. Metabolically active
- D. Endures extreme condition
Explanation: Endospores are incredibly resilient to extreme environmental conditions, including high temperatures, desiccation, radiation, and chemical…
Correct answer: Endures extreme condition- A. Lag
- B. Log
- C. Stationary
- D. Decline
Explanation: In this phase, bacteria divide rapidly by binary fission, where each cell splits into two identical daughter cells.
Correct answer: Log- A. Heterocyst
- B. Lysosomes
- C. Mitochondria
- D. Ribosomes
Explanation: Heterocysts are specialized cells found in certain filamentous cyanobacteria (blue-green algae) that play a critical role in nitrogen…
Correct answer: Heterocyst