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 3 of 27
- A. Proteins
- B. Lipids
- C. Enzymes
- D. Chemicals
Explanation: Bacterial cells lack membrane-bound organelles such as mitochondria. Therefore, the enzymes needed for respiration are present in…
Correct answer: Enzymes- A. Radiation
- B. Filtration
- C. High temperature
- D. Antiseptic
Explanation: Option A:Sterilization by ionizing radiation, primarily by cobalt 60 gamma rays or electron accelerators, is a low-temperature…
Correct answer: Antiseptic- A. Diplococcus
- B. Tetrad
- C. Peritrichous
- D. Monotrichous
Explanation: Diplococcus and Tetrad are some of the shapes of bacteria and are not related to flagella. Monotrichous means 1 flagella.
Correct answer: Peritrichous- A. Sexual reproduction
- B. Binary fission
- C. Mitosis
- D. Conjugation
Explanation: The following diagram shows reproduction by conjugation and it can be seen that the recipient forms a pilus at the end.
Correct answer: Conjugation- A. Helix
- B. Around
- C. Rod
- D. Rigid helix
Explanation: c) Rod: The correct answer is option (c) "Rod." Rod-shaped bacteria are also known as bacilli. They have a cylindrical or rod-like shape.
Correct answer: Rod- A. Facultative anaerobes
- B. Obligate aerobes
- C. Obligate anaerobes
- D. Facultative aerobes
Explanation: Obligate aerobes are bacteria that need oxygen to grow and multiply but cannot do so in the absence of oxygen.
Correct answer: Obligate aerobes- A. Vibrio
- B. Cocci
- C. Spirilla
- D. Bacilli
Explanation: Menaquinones are the naturally occurring form of vitamin K identified in bacteria. Bacilli in intestine produce vitamin K.
Correct answer: Bacilli- A. Gram-positive bacteria
- B. Both gram-positive and gram-negative bacteria
- C. Gram-negative bacteria
- D. All bacteria
Explanation: The nucleoid is the region of cytoplasm where the bacterial genetic material is found.
Correct answer: All bacteria- A. All bacteria
- B. Gram-negative bacteria
- C. Both gram-positive and gram-negative bacteria
- D. Gram-positive bacteria
Explanation: Pili can be found evenly around the surface of the cell, or localized to one or both of the poles.
Correct answer: Gram-negative bacteria- A. PS-I
- B. None of these
- C. PS-I and PS-II both
- D. PS-II
Explanation: Cyanobacteria have two photosystems (PSI and PSII), and anoxygenic phototrophs have either PSI or PSII-like photosystems.
Correct answer: PS-I and PS-II both- A. Cell wall
- B. Slime
- C. Capsule
- D. Cell membrane
Explanation: The cell membrane of bacteria is very delicate and any damage to it can kill the bacteria.
Correct answer: Cell membrane- A. Gram-negative
- B. Gram-positive
- C. None of these
- D. E. coli
Explanation: Neisseria gonorrhoeae, the causative agent of gonorrhoea, is a Gram negative, coffee-bean shaped facultative intracellular diplococcus…
Correct answer: Gram-negative- A. Sodium channels
- B. Heterocysts
- C. Hormogonia
- D. Nitrogenase
Explanation: Cyanobacteria have specialized nitrogen-fixing cells called heterocysts which play a vital role in nitrogen fixation.
Correct answer: Heterocysts- A. Tetracycline
- B. Streptomycin
- C. Azythromycin
- D. Penicillin
Explanation: Tetracycline antibiotic has been found to cause permanent discoloration of teeth in kids below 8 years.
Correct answer: Tetracycline- A. Phosphorus Cycle
- B. Nitrogen Cycle
- C. Carbon Cycle
- D. All of the above
Explanation: In nitrogen cycle :Nitrogen-fixing bacteria convert N2 to ammonia Nitrifying bacteria convert ammonia to nitrates and nitrites…
Correct answer: All of the above56. E. coli is
- A. Anaerobic
- B. Gram negative
- C. Facultative
- D. All of the above
Explanation: E coli is a gram negative (Stains pink with Gram's stain), facultative and anaerobic microbe.
Correct answer: All of the above- A. Amphitrichous
- B. Atrichous
- C. Lophotrichous
- D. Peritrichous
Explanation: Based on their flagella, bacteria can be classified as follows: Atrichous have no flagella (the suffix 'a' usually implies an absence of…
Correct answer: Atrichous- A. Rod
- B. Egg
- C. Ball
- D. None of these
Explanation: d) None of these: If none of the options accurately describes the shape of Coccobacillus, then this would be the correct answer.
Correct answer: None of these- A. Sporulation
- B. Fission
- C. Apomixis
- D. All of these options are correct
Explanation: Sporulation: Leads to spore formation asexually. Fission: Mechanism of asexual reproduction in prokaryotes.
Correct answer: All of these options are correct- A. Absence of membrane bound cell organelles
- B. Presence of 70S ribosomes
- C. Both Options A and B are correct
- D. None of these
Explanation: Prokaryotic cells lack a nucleus, have no membrane-bound organelles, and have 70S ribosomes.
Correct answer: Both Options A and B are correct