Free Kingdom Prokaryotae MCQs with Answers

• A. Coccus
• B. Spirochete
• C. Vibrio
• D. Bacillus

Explanation: Bacillus, (genus Bacillus), any of a genus of rod-shaped, gram-positive, aerobic or (under some conditions) anaerobic bacteria widely…

• A. Tuberculosis and typhoid
• B. Tuberculosis and measels
• C. Tuberculosis and cholera
• D. All of the above

Explanation: Robert Koch discovered the anthrax disease cycle and the bacteria responsible for "tuberculosis and cholera".Option A,B and D are incorrect

• A. Bacteria and Protista
• B. Archaea and Eukarya
• C. Eukarya and Monera
• D. Eubacteria and archaea

Explanation: d) Eubacteria and Archaea: This option is correct. Eubacteria, also known as true bacteria, is a group of prokaryotes that are common and…

• A. Protein
• B. Chemical
• C. Enzyme
• D. None of the above options are correct

Explanation: Flagella are made up of a protein called flagellin, which forms long filaments that are the structural backbone of the flagellum.

• A. Protection from enviroment
• B. Protection from engulfment
• C. Protection from osmotic lysis
• D. All of the above

Explanation: The capsule is tightly bound to the bacterial cell. It is a part of the cell envelope.

• A. Archaebacteria and vibrio bacteria
• B. Eubacteria and Streptococus
• C. Eubacteria and Archaebacteria
• D. Cyanobacteria and Archaebacteria

Explanation: Eubacteria and Archaebacteria are the two main domains of prokaryotic organisms.Eubacteria are the most familiar type of bacteria that…

• A. Both are same in size
• B. Both help in movement
• C. Both are composed of proteins
• D. All of the above options are correct

Explanation: Option A: This is not the correct option because pili are smaller than flagella.Option B: Flagella help in locomotion while pili are used…

• A. Nucleus
• B. Plasmid
• C. Mitochondria
• D. Both Options A and B are correct

Explanation: Prokaryotes can also contain plasmids, which are much smaller circular pieces of DNA that often have genes that give antibiotic…

• A. Bacteria contain plasma membranes that are made up of triglycerides
• B. Gram staining reveals that bacteria contain cell walls, but no cell membranes
• C. Bacteria do not contain a membrane-bound nucleus, but they contain an non membrane-bound structure called the nucleoid
• D. All of these options are false

Explanation: Option A; All cells including bactria contain cell membrane but it is not made up of triglycerides.Option B: Gram staining tells us about…

• A. Nucleus
• B. DNA
• C. Cell membrane
• D. Mitochondria

Explanation: Although blood is an excellent source of DNA, the DNA does not come from the red blood cells, as these cells have no nuclei.

• A. Aerobic
• B. Facultative
• C. Anaerobic
• D. Both Options A and B are correct

Explanation: Spirochaeta are free-living nonpathogenic inhabitants of mud and water, typically thriving in anaerobic (oxygen-deprived) environments

• A. Flagella
• B. Pili
• C. Capsules
• D. Plasmids

Explanation: Fimbriae and pili are hair-like appendages present on the bacterial cell wall similar to flagella.

• A. Heterotrophic bacteria
• B. Saprotrophic bacteria
• C. Chemosynthetic bacteria
• D. Parasitic bacteria

Explanation: Chemosynthetic bacteria oxidise inorganic compounds like ammonia, nitrate, nitrite, sulphur or ferrous ions and use the energy thus…

• A. The bacteria is anaerobic
• B. The bacterial sample was pretreated with 3% ethanol
• C. The bacteria's periplasmic space
• D. The bacteria's thick peptidoglycan cell walls

Explanation: Gram-positive bacteria have a thick layer of peptidoglycan in their cell walls, which allows them to take up the crystal violet colour of…

• A. A bacterium
• B. A virus
• C. A parasite
• D. Protozoa

Explanation: Epulopiscium fishelsoni is a very large bacterium that only lives in the gut of a brown surgeonfish found in the Red Sea.

• A. Cillia
• B. Flagella
• C. Pili
• D. Pseudopodia

Explanation: The bacterial flagellum is a motile organelle composed of thousands of protein subunits.

• A. Lophotrichous
• B. Peritrichous
• C. Monotrichous
• D. Amphitrichous

Explanation: OPTION A: A lophotrichous bacterium has a group of two or more flagella inserted at one pole of the cell.

• A. Cell wall
• B. Genetic material
• C. Cytoplasm
• D. Mitochondria

Explanation: OPTION A: The cell wall is present in both prokaryotes and eukaryotes. OPTION B: DNA is the genetic material present in both prokaryotes…

• A. Motality
• B. Conjugation
• C. Chemical detection
• D. None of above options are correct

Explanation: Option A : Pilli is not involved in motility. Motility is the function of flagella.

• A. Constitutive anaerobe
• B. Facultative anaerobe
• C. Constitutive aerobe
• D. Obligate anaerobe

Explanation: A facultative anaerobe is any organism that is able to produce energy aerobically and ''switch to anaerobic respiration depending on the…