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 6 of 27
- A. Capsule
- B. Slime
- C. Spore
- D. Cell wall
Explanation: In the bacterial cell wall, lying between the outer membrane layer and the cytoplasmic membrane is a site where some species of enzymes…
Correct answer: Cell wall- A. Producers
- B. Decomposers
- C. Consumers
- D. Denvers
Explanation: Bacteria and fungi are examples of decomposers, and gain energy from breaking down dead organisms or waste from other organisms.
Correct answer: Decomposers- A. Rapid cure
- B. Increased resistance in pathogen
- C. Disturbance of metabolism
- D. Immunity
Explanation: Misuse and overuse of antibiotics gives the bacteria more chances to develop resistance to that antibiotic, and this resistance can be…
Correct answer: Increased resistance in pathogen- A. Lag phase
- B. Log phase
- C. Death phase
- D. Stationary phase
Explanation: Option A is incorrect because Lag phase is phase of no growth and bacteria prepare themselves for division.Option B is incorrect because…
Correct answer: Stationary phase- A. Actinomycetes
- B. Oomycetes
- C. Ascomycetes
- D. Basidiomycetes
Explanation: Antibiotics are synthesized and secreted by certain bacteria (actinomycetes) and fungi. (PTB)
Correct answer: Actinomycetes- A. Gram-positive bacteria have more lipids in their cell wall
- B. Gram-negative bacteria have more lipids in their cell wall
- C. Lipids are absent in cell wall of both gram positive and negative bacteria
- D. Both have equal amount of lipids
Explanation: Gram-negative bacteria have a more complex cell wall structure compared to gram-positive bacteria.
Correct answer: Gram-negative bacteria have more lipids in their cell wall- A. Staphylococcus
- B. Sarcinae
- C. Streptococci
- D. Cocci
Explanation: Pair of cocci are, called diplococci Rows or chains of cells are called streptococci. Grapelike clusters of cells are staphylococci.
Correct answer: Streptococci- A. Positive bacteria
- B. Negative bacteria
- C. Gram-negative
- D. Gram-positive
Explanation: Gram-positive bacteria have a thick peptidoglycan layer and no outer lipid membrane which gives a positive result in the gram stain test…
Correct answer: Gram-positive- A. O2
- B. CO2
- C. NO2
- D. NO3
Explanation: Nitrogen fixing bacteria contain an enzyme complex known as Nitrogenase which catalyses the conversion of nitrogen gas to ammonia.
Correct answer: O2- A. Beta-proteo bacteria
- B. Alpha-proteobacteria
- C. Gamma-proteo bacteria
- D. Delta proteo bacteria
Explanation: Sulfur bacteria belongs to gamma-proteo bacteria which take part in nitrogen and sulfur cycling processes
Correct answer: Gamma-proteo bacteria- A. Log phase
- B. Lag phase
- C. Growth phase
- D. Decline phase
Explanation: Bacterial cells divide at exponential rate during log phase, hence disease symptoms become prominent during this phase.
Correct answer: Log phase- A. Antibiotic resistance gene
- B. Origin of replication
- C. Cloning site
- D. Ligases enzymes
Explanation: An essential feature of bacterial plasmids is their ability to replicate as autonomous genetic elements in a controlled way within the…
Correct answer: Origin of replication- A. Induction
- B. Transformation
- C. Transduction
- D. Conjugation
Explanation: Transduction is the process by which a virus transfers genetic material from one bacterium to another.
Correct answer: Transduction- A. Oxidation of bacterial compounds
- B. Coagulation of bacterial proteins
- C. Separate the bacteria from their media
- D. Decrease in bacterial growth
Explanation: Is correct as During the sterilization process, oxidation of bacterial compounds can occur due to the exposure of bacteria to various…
Correct answer: Oxidation of bacterial compounds- A. Sulphur
- B. Oxygen
- C. Hydrogen
- D. Carbon dioxide
Explanation: The following are the chemical equations of photosynthesis in photosynthetic bacteria;
Correct answer: Sulphur- A. Mutation in bacterial genome
- B. Denaturation of bacterial proteins
- C. Activation of bacteria
- D. Bacteria to become pathogen
Explanation: A is the most suitable option since X-rays do cause mutations in bacterial genomes and prevent them from dividing.
Correct answer: Mutation in bacterial genome- A. Steroid
- B. Respiratory enzymes
- C. Cholesterol
- D. Phospholipids
Explanation: Cholesterol (or other higher sterols such as ergosterol and phytosterols) is universally present in large amounts (20-40 mol%) in…
Correct answer: Cholesterol118. Pili are hollow, non helical, filamentous appendages in bacteria. Which one is not true for pili:
- A. They are involved in mating process
- B. They are the means of attachments of bacteria to various surfaces
- C. They are made up of protein
- D. These are present in gram-positive bacteria
Explanation: Pili are a characteristic of Gram-negative bacteria.
Correct answer: These are present in gram-positive bacteria- A. Diplococcus
- B. Tetrad
- C. Sarcina
- D. Staphylococcus
Explanation: This option is correct because when Bacteria appear in pairs, then it is named as diplococci.
Correct answer: Diplococcus- A. Cocci
- B. Streptobaccilus
- C. Bacillus
- D. Diplobacilli
Explanation: A single rod-shaped bacterium is called a Bacillus.
Correct answer: Bacillus