Biological Classification Chapter-Wise Test 8

Correct answer Carries: 4.

Wrong Answer Carries: -1.

Which of the following fungal groups is also called sac fungi?

Phycomycetes
Ascomycetes
Basidiomycetes
Deuteromycetes
2

Ascomycetes are known as sac fungi because they produce ascospores inside sac-like asci.

Which of the following statements about lichens is incorrect?

Lichens are a symbiotic association of fungi and algae.
Lichens are sensitive to air pollution.
Fungi in lichens provide food through photosynthesis.
Lichens can grow in extreme environments.
3

In lichens, the algae perform photosynthesis and provide food, while fungi offer protection and moisture.

Which kingdom includes both unicellular and multicellular heterotrophic organisms?

Monera
Fungi
Plantae
Animalia
2

Kingdom Fungi includes both unicellular (e.g., yeast) and multicellular (e.g., mushrooms) heterotrophic organisms.

Which of the following statements about Mycoplasma is correct?

Mycoplasma have a well-defined cell wall.
Mycoplasma are the smallest free-living organisms.
Mycoplasma contain peptidoglycan in their cell walls.
Mycoplasma are obligate intracellular parasites.
2

Mycoplasma are the smallest free-living organisms and are unique in lacking a cell wall.

Which of the following is a characteristic feature of archaebacteria?

Presence of peptidoglycan in their cell walls
Ability to survive in extreme environments
Obligate intracellular parasites
Photosynthetic nutrition
2

Archaebacteria are known for their ability to survive in extreme environments, such as high temperatures or salinity, and have unique cell walls lacking peptidoglycan.

Which of the following is an example of a saprophytic protist?

Slime moulds
Euglenoids
Dinoflagellates
Diatoms
1

Slime moulds are saprophytic protists that feed on decaying organic material.

Which of the following statements about prions is correct?

Prions are infectious proteins.
Prions contain nucleic acids.
Prions have a cellular structure.
Prions infect only plants.
1

Prions are infectious proteins that cause neurodegenerative diseases such as mad cow disease.

Which of the following organisms causes sleeping sickness?

Plasmodium
Trypanosoma
Entamoeba
Gonyaulax
2

Trypanosoma, a flagellated protozoan, causes sleeping sickness in humans.

Which of the following is an example of a free-living nitrogen-fixing bacterium?

Rhizobium
Azotobacter
Mycobacterium
Clostridium
2

Azotobacter is a free-living nitrogen-fixing bacterium found in the soil.

Which feature of diatoms makes them ecologically important in aquatic ecosystems?

They act as decomposers
They fix atmospheric nitrogen
They form the primary producers in the food chain
They cause red tides
3

Diatoms are primary producers in aquatic ecosystems, forming the base of the food chain by photosynthesizing.

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