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 2 of 27
- A. Nucleolus
- B. Centrosome
- C. Nucleoid
- D. Nucleus
Explanation: Bacterial chromosomes are located in a nucleoid, a distinct cytoplasmic structure, in which double-stranded DNA is coated with…
Correct answer: Nucleoid- A. Mesosomes
- B. Zygospores
- C. Endospores
- D. Hyphae
Explanation: Numerous strategies exist in bacteria to cope with stressful conditions including the formation of endospores.
Correct answer: Endospores- A. Centrosomes
- B. Mesosomes
- C. Dictyosomes
- D. Polysomes
Explanation: Mesosomes or chondroids are folded invaginations in the plasma membrane of bacteria.
Correct answer: Mesosomes- A. Gram-positive bacteria
- B. Gram-negative bacteria
- C. Both Gram-negative and positive bacteria
- D. None of these options are correct
Explanation: Gram-negative bacteria have an outer layer (membrane) that protects them from their environment.
Correct answer: Gram-negative bacteria- A. Spherical
- B. Spring
- C. Rod
- D. Screw
- E. Comma
Explanation: Coccus, plural Cocci, in microbiology, a spherical-shaped bacterium.
Correct answer: Spherical- A. Cocci
- B. Bacilli
- C. Spirilla
- D. Commas
Explanation: Bacteria are classified according to their shape, or morphology. Spherical bacteria are known as cocci, rod-shaped bacteria are bacilli…
Correct answer: Commas- A. Cellular anaerobe
- B. Respiratory anaerobe
- C. Obligate anaerobe
- D. Facultative anaerobe
Explanation: Facultative anaerobes are bacteria that can grow in both the presence or absence of oxygen.
Correct answer: Facultative anaerobe- A. Slime
- B. Capsule
- C. Cell wall
- D. Cell membrane
Explanation: Mollicutes is a class of bacteria which does not contain cell wall in its cell envelope.While in most of the bacteria the cell envelope…
Correct answer: Cell wall- A. Robert Koch
- B. Louis Pasteur
- C. Alexander Fleming
- D. Leeuwenhoek
Explanation: Animalcule ('little animal', from Latin animal + the diminutive suffix -culum) is an old term for microscopic organisms that included…
Correct answer: Leeuwenhoek- A. Cytoplasmic matrix
- B. Cytoplasm
- C. Protoplast
- D. Cell Structure
Explanation: The protoplasm consists of two major divisions in eukaryotes: the cytoplasm, and the nucleoplasm (cell nucleus).
Correct answer: Protoplast- A. To give cells rigidity
- B. To give specific shape
- C. To protect from osmotic lysis
- D. All of Above
Explanation: All prokaryotic cells have a stiff cell wall located underneath the capsule (if there is one).
Correct answer: All of Above- A. Archea Bacteria
- B. Cyano Bacteria
- C. Eu-bacteria
- D. Both B and C
Explanation: Eubacteria, on the other hand, encompass a wide range of bacteria that can be found in various habitats, including soil, water, and the…
Correct answer: Eu-bacteria- A. Heterotrophic bacteria
- B. Saprotrophic bacteria
- C. Chemosynthetic bacteria
- D. Photosynthetic bacteria
Explanation: Option A: Heterotrophic bacteria is incorrect because heterotrophic bacteria are bacteria that obtain their energy from organic compounds…
Correct answer: Photosynthetic bacteria- A. Transduction
- B. Transformation
- C. Binary fission
- D. Conjugation
Explanation: Option A: Transduction is the process by which genetic material is transferred from one bacterium to another by a bacteriophage (a virus…
Correct answer: Binary fission- A. Slime
- B. Cell Wall
- C. Cell Membrane
- D. Capsule
Explanation: In the question, you need to identify the structure that provides greater pathogenicity to the bacteria.
Correct answer: Slime- A. 40% of dry weight
- B. 50% of dry weight
- C. 10% of dry weight
- D. 80% of dry weight
Explanation: Gram-positive bacteria have a thick peptidoglycan layer, which comprises 50% of their dry weight.
Correct answer: 50% of dry weight- A. Gram-negative bacteria are more likely to cause systemic effects because they lack an outer membrane, which means they can more quickly infect host cells
- B. Gram-negative bacteria are more likely to cause systemic effects because their outer membrane protects them from antibiotics
- C. Both Options A and B are correct
- D. None of these options are correct
Explanation: gram-negative bacteria have thinner membranes, which allows them to resist many antibacterial medicines.
Correct answer: Gram-negative bacteria are more likely to cause systemic effects because their outer membrane protects them from antibiotics- A. Gram-negative
- B. Gram-positive
- C. Capsule
- D. Both Gram positive & negative
Explanation: The Gram stain procedure distinguishes between Gram positive and Gram negative groups by coloring these cells red or violet.
Correct answer: Gram-positive- A. Cube of 8 cocci
- B. Square of 4 cocci
- C. Irregular structure
- D. Triangular 6 cocci
Explanation: Sarcina is a genus of gram-positive cocci bacteria in the family Clostridiaceae.
Correct answer: Cube of 8 cocci- A. Bacillus anthracis
- B. Escherichia coli
- C. Spirillum minus
- D. Staphylococcus aureus
Explanation: Staphylococcus aureus (cocci) is a round shaped bacteria. Since it is spherical in shape therefore it is the right choice here.
Correct answer: Staphylococcus aureus