Monera - bacteria, archaebacteria and their shapes — practice questions

Question 1 · difficulty L1 · recall

What is the usual shape of a coccus bacterium?

• A. Spherical
• B. Rod-shaped
• C. Comma-shaped
• D. Spiral

Question 2 · difficulty L1 · recall

Which bacterial form is typically rod-shaped?

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

Question 3 · difficulty L2 · understanding

Why are archaebacteria able to survive in habitats such as extremely salty water or hot acidic environments?

• A. Their cell-wall and membrane characteristics are adapted to extreme conditions
• B. They possess a membrane-bound nucleus
• C. They always form endospores before exposure
• D. They are multicellular

Question 4 · difficulty L2 · understanding

Which feature is characteristic of cyanobacteria?

• A. They can perform photosynthesis
• B. They possess a true nucleus
• C. They are all obligate parasites
• D. They lack ribosomes

Question 5 · difficulty L3 · application

A bacterium isolated from a marsh releases methane during metabolism. To which ecological group is it most likely to belong?

• A. Methanogens
• B. Cyanobacteria
• C. Mycoplasma
• D. Chemosynthetic nitrifying bacteria

Question 6 · difficulty L3 · application

A prokaryote lacks a cell wall and can survive without oxygen. Which group from Monera best fits this description?

• A. Mycoplasma
• B. Cyanobacteria
• C. Halophiles
• D. Actinomycetes

Question 7 · difficulty L3 · understanding

House fly belongs to _____ family.

• A. Cyprinidae
• B. Hominidae
• C. Calliphoridae
• D. Muscidae

Question 8 · difficulty L3 · understanding

Given below are two statements: Statement I : Mycoplasma can pass through less than 1 micron filter size. Statement II : Mycoplasma are bacteria with cell wall. In the light of the above statements, choose the most appropriate answer from the options given below :

• A. Both Statement I and Statement II are correct
• B. Both Statement I and Statement II are incorrect
• C. Statement I is correct but Statement II is incorrect
• D. Statement I is incorrect but Statement II is correct

Question 9 · difficulty L3 · understanding

Which of the following is a correct statement?

• A. autotrophic organisms classified under kingdom Monera Cyanobacteria are a group of autotrophic organisms classified under Kingdom Monera
• B. Bacteria are exclusively heterotrophic organisms
• C. Slime moulds are saprophytic organisms classified under Kingdom Monera.
• D. Mycoplasma have DNA, ribosome and cell wall.

Question 10 · difficulty L4 · analysis

Two prokaryotes are compared. Organism X uses light energy and releases oxygen, whereas organism Y gains energy by oxidising inorganic substances such as ammonia. Which description is correct?

• A. X is photosynthetic and Y is chemosynthetic
• B. Both are chemosynthetic
• C. X is heterotrophic and Y is photosynthetic
• D. Both must be archaebacteria