Chapter Exam

Chapter 2: Biological Classification — Online MCQ Test

Q: Who proposed the Five Kingdom Classification system?

Answer: B. R.H. Whittaker — R.H. Whittaker proposed the Five Kingdom Classification in 1969 based on cell structure, body organisation, mode of nutrition, and reproduction.

Q: Which kingdom includes organisms that are prokaryotic?

Answer: A. Monera — Monerans are prokaryotic organisms, meaning they lack a true nucleus and membrane-bound organelles.

Q: A well-defined nucleus is absent in members of which kingdom?

Answer: C. Monera — Members of Monera are prokaryotes and therefore do not have a membrane-bound nucleus.

Q: Which kingdom contains unicellular eukaryotic organisms?

Answer: B. Protista — Protista includes unicellular eukaryotes such as Amoeba and Paramecium.

Q: An organism is unicellular, eukaryotic and often motile. It is most likely placed in which kingdom?

Answer: B. Protista — Unicellular eukaryotic and often motile organisms are typically placed in Protista.

Q: Which of the following correctly matches the kingdom with its mode of nutrition?

Answer: B. Fungi – absorptive heterotrophs — Fungi are absorptive heterotrophs; they secrete enzymes and absorb digested food.

Q: Which statement best explains why viruses are not placed in Whittaker’s five kingdom classification?

Answer: B. They lack cellular organisation — Viruses are acellular and do not show cellular organisation, so they are not included in the five kingdom system.

Q: A scientist observes an organism that is eukaryotic, unicellular, and may be photosynthetic or heterotrophic. Which kingdom is the best fit?

Answer: A. Protista — Protista includes diverse unicellular eukaryotes, some photosynthetic and some heterotrophic.

Q: Why did Whittaker place cyanobacteria in Monera instead of Protista?

Answer: B. Because they are prokaryotic — Cyanobacteria are bacteria and therefore prokaryotic, which places them in Monera.

BIOLOGY · Grade 11 · CBSE(NCERT)

Practice Chapter 2: Biological Classification with a free chapter-wise online MCQ test for CBSE(NCERT) Grade 11 BIOLOGY. This chapter covers: Five Kingdom Classification Monera Protista Fungi Plantae Animalia Prokaryotes Eukaryotes Classification Characteristics. AI-generated questions from basic to board-exam level, with instant results and explanations.

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Chapter 2: Biological Classification — Important Questions & Answers (FAQ)

Frequently asked questions from CBSE(NCERT) Grade 11 BIOLOGY — Chapter 2: Biological Classification, with answers and explanations. These are sample questions; the exam has its own separate question set.

Who proposed the Five Kingdom Classification system?

A. Carl Woese
B. R.H. Whittaker ✓
C. Ernst Haeckel
D. Linnaeus

Answer: B. R.H. Whittaker
R.H. Whittaker proposed the Five Kingdom Classification in 1969 based on cell structure, body organisation, mode of nutrition, and reproduction.

Which kingdom includes organisms that are prokaryotic?

A. Monera ✓
B. Protista
C. Fungi
D. Plantae

Answer: A. Monera
Monerans are prokaryotic organisms, meaning they lack a true nucleus and membrane-bound organelles.

A well-defined nucleus is absent in members of which kingdom?

A. Animalia
B. Plantae
C. Monera ✓
D. Fungi

Answer: C. Monera
Members of Monera are prokaryotes and therefore do not have a membrane-bound nucleus.

Which kingdom contains unicellular eukaryotic organisms?

A. Monera
B. Protista ✓
C. Fungi
D. Plantae

Answer: B. Protista
Protista includes unicellular eukaryotes such as Amoeba and Paramecium.

An organism is unicellular, eukaryotic and often motile. It is most likely placed in which kingdom?

A. Monera
B. Protista ✓
C. Plantae
D. Animalia

Answer: B. Protista
Unicellular eukaryotic and often motile organisms are typically placed in Protista.

Which of the following correctly matches the kingdom with its mode of nutrition?

A. Plantae – absorptive heterotrophs
B. Fungi – absorptive heterotrophs ✓
C. Animalia – autotrophic
D. Monera – only photosynthetic

Answer: B. Fungi – absorptive heterotrophs
Fungi are absorptive heterotrophs; they secrete enzymes and absorb digested food.

Which statement best explains why viruses are not placed in Whittaker’s five kingdom classification?

A. They are prokaryotic
B. They lack cellular organisation ✓
C. They are multicellular
D. They have chitinous walls

Answer: B. They lack cellular organisation
Viruses are acellular and do not show cellular organisation, so they are not included in the five kingdom system.

A scientist observes an organism that is eukaryotic, unicellular, and may be photosynthetic or heterotrophic. Which kingdom is the best fit?

A. Protista ✓
B. Monera
C. Fungi
D. Animalia

Answer: A. Protista
Protista includes diverse unicellular eukaryotes, some photosynthetic and some heterotrophic.

Why did Whittaker place cyanobacteria in Monera instead of Protista?

A. Because they are multicellular
B. Because they are prokaryotic ✓
C. Because they lack cell wall
D. Because they are always parasitic

Answer: B. Because they are prokaryotic
Cyanobacteria are bacteria and therefore prokaryotic, which places them in Monera.

Which of the following statements about Kingdom Protista is the most accurate?

A. It includes only photosynthetic unicellular organisms
B. It includes only aquatic prokaryotes
C. It is a diverse group of mostly unicellular eukaryotes ✓
D. It contains only organisms with chitinous cell walls

Answer: C. It is a diverse group of mostly unicellular eukaryotes
Protista is a diverse kingdom made up mainly of unicellular eukaryotic organisms with varied modes of nutrition and locomotion.

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Chapter 3: Plant Kingdom