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 20 of 27
- A. Physical agents
- B. Biological agents
- C. Chemical agents
- D. All of these
Explanation: Pesticides and insecticides are the chemicals which kill the unwanted pests and insects for the welfare of humans.
Correct answer: Chemical agents- A. CO2 cycle
- B. Nitrogen cycle
- C. Phosphorus cycle
- D. All of above
Explanation: Bacteria play vita role(s) in all of the above mentioned cycles be it in the form of decomposition, nitrogen fixation , denitrification or…
Correct answer: All of above- A. Lag
- B. Log
- C. Stationary
- D. Decline
Explanation: Exponential Phase (Logarithmic Phase): In the exponential phase, the bacteria experience rapid and continuous growth at an exponential…
Correct answer: Log- A. TATA box
- B. Promoter
- C. Terminator
- D. Shine-Dalgarno sequence
Explanation: The correct answer is D) Shine-Dalgarno sequence. The Shine-Dalgarno sequence is a short RNA sequence found in the mRNA of prokaryotic…
Correct answer: Shine-Dalgarno sequence- A. A.V. Leeuwenhoek
- B. Pasture
- C. Janssen and Hans
- D. None of these
Explanation: It had long been suspected that small creatures exist which are too small to be seen with the naked eye.
Correct answer: A.V. Leeuwenhoek- A. Heterotrophic Bacteria
- B. Saprotrophic Bacteria
- C. Chemosynthetic Bacteria
- D. Parasitic Bacteria
Explanation: Chemosynthetic bacteria obtain their energy by converting inorganic substances into organic compounds.
Correct answer: Chemosynthetic Bacteria- A. Within nucleolus
- B. Prior to fission
- C. Just before transcription
- D. During SDuring S phase:
Explanation: DNA replication in bacteria occurs just before fission. Here's an explanation for each of the options you mentioned:1.
Correct answer: Prior to fission- A. Isogamy
- B. Anisogamy
- C. Oogamy
- D. All of these
Explanation: d. In Chlorophyceae, the mode of sexual reproduction can be all of these-Isogamy, Anisogamy, and Oogamy.
Correct answer: All of these- A. Spirogyra
- B. Nostoc
- C. Ulothrix
- D. Volvox
Explanation: b. Nostoc belongs to Cyanophyceae. In this entire class sexual reproduction is completely absent.
Correct answer: Nostoc- A. Some diatoms and several cyanobacteria
- B. Some cyanobacteria and many diatoms
- C. Everal cyanobacteria and several diatoms
- D. Several diatoms and a few cyanobacteria.
Explanation: d. Until 1907, auxospore formation was regarded as asexual process but now it is considered as an act of sexual process.
Correct answer: Several diatoms and a few cyanobacteria.- A. Four
- B. Five
- C. Six
- D. Three
Explanation: The autotrophs in the list given are: Nostoc Chara Porphyra Wolffia Autotrophs are organisms that can synthesize their own organic…
Correct answer: Four- A. Chromosome
- B. Plasmid
- C. Nucleoid
- D. Mitochondria
Explanation: The correct answer is the nucleoid. In prokaryotic cells, the nucleoid is the region where the cell's chromosomal DNA is concentrated.
Correct answer: Nucleoid- A. Autotroph
- B. Heterotroph
- C. Decomposer
- D. None
Explanation: The correct answer is: a) Autotroph.Cyanobacteria are classified as autotrophs because they have the capability to produce their own food…
Correct answer: Autotroph- A. Long chain of cells
- B. Types of division
- C. Shape
- D. All of the above
Explanation: The arrangements of cocci are determined by how they divide and remain connected.
Correct answer: All of the above- A. Sacrinae
- B. Tetrad
- C. Staphylococcus
- D. All of the above
Explanation: The correct answer is Sacrinae because when cocci undergo division in three planes, they form a cubic arrangement of 8 cells.
Correct answer: Sacrinae- A. E. coli
- B. Vibrio
- C. Mycoplasma
- D. Bacillus
Explanation: The correct answer is Vibrio, which refers to bacteria that are characteristically comma-shaped. E.
Correct answer: Vibrio- A. Spirochete
- B. E. coli
- C. Pseudomonas
- D. Streptococcus
Explanation: The correct answer is Spirochete because they are spiral-shaped bacteria.
Correct answer: Spirochete- A. Four
- B. Five
- C. Six
- D. Three
Explanation: Photoautotrophs are organisms that can synthesize their own food using sunlight as an energy source.
Correct answer: Four- A. 175 x 10^5 cells/ml
- B. 5 x 10^5 cells/ml
- C. 35 x 10^5 cells/ml
- D. 32 x 10^5 cells/ml
Explanation: The bacterium divides every 36 minutes. The total time given is 180 minutes.
Correct answer: 32 x 10^5 cells/ml- A. Cytoplasm
- B. Nuclear membrane
- C. RER
- D. Cell Wall
Explanation: The correct answer is A) Cytoplasm, as bacterial ribosomes are found in the cytoplasm of the cell where they carry out protein synthesis.
Correct answer: Cytoplasm