Part 3 — Kingdom Protista (Q51–Q75)
Part 3 — Kingdom Protista (Q51–Q75)
Q51. Kingdom Protista includes:
- A. Multicellular prokaryotes
- B. Unicellular eukaryotes
- C. Multicellular eukaryotes
- D. Acellular organisms
Answer: B
- A: Incorrect — prokaryotes are Monera.
- B: Correct — Protista are mostly unicellular eukaryotes.
- C: Incorrect — multicellular eukaryotes belong to Plantae, Animalia, Fungi.
- D: Incorrect — viruses are acellular, not protists.
Q52. Dinoflagellates are mostly:
- A. Photosynthetic with cellulose plates
- B. Non-photosynthetic with chitin walls
- C. Prokaryotic with peptidoglycan walls
- D. Saprophytic fungi
Answer: A
- A: Correct — Dinoflagellates are photosynthetic with stiff cellulose plates.
- B: Incorrect — chitin wall is fungal.
- C: Incorrect — they are eukaryotic.
- D: Incorrect — fungi are separate.
Q53. Diatoms are also called:
- A. Protistan algae
- B. Protozoans
- C. Slime moulds
- D. Fungi
Answer: A
- A: Correct — diatoms are photosynthetic protists called protistan algae.
- B: Incorrect — protozoans are heterotrophic.
- C: Incorrect — slime moulds are fungus-like protists.
- D: Incorrect — fungi belong to another kingdom.
Q54. Diatom cell walls are made of:
- A. Cellulose
- B. Silica
- C. Chitin
- D. Protein
Answer: B
- A: Incorrect — cellulose in plants.
- B: Correct — diatoms have silica shells.
- C: Incorrect — chitin in fungi.
- D: Incorrect — not protein.
Q55. Euglena shows:
- A. Only autotrophy
- B. Only heterotrophy
- C. Mixotrophy
- D. Parasitism
Answer: C
- A: Incorrect — not strictly autotrophic.
- B: Incorrect — not strictly heterotrophic.
- C: Correct — photosynthetic in light, heterotrophic in dark.
- D: Incorrect — not parasitic.
Q56. Red color in Gonyaulax is due to:
- A. Chlorophyll-b
- B. Fucoxanthin
- C. Carotenoids
- D. Phycoerythrin
Answer: C
- A: Incorrect.
- B: Incorrect — fucoxanthin is in brown algae.
- C: Correct — carotenoids dominate in red dinoflagellates.
- D: Incorrect — phycoerythrin in red algae.
Q57. Red tides are caused by:
- A. Cyanobacteria
- B. Dinoflagellates
- C. Diatoms
- D. Euglenoids
Answer: B
- A: Incorrect — cyanobacteria cause freshwater blooms.
- B: Correct — dinoflagellates like Gonyaulax cause red tides.
- C: Incorrect — diatoms don’t cause red tides.
- D: Incorrect.
Q58. Malaria is caused by:
- A. Amoeba
- B. Plasmodium
- C. Trypanosoma
- D. Giardia
Answer: B
- A: Incorrect — Amoeba causes dysentery.
- B: Correct — Plasmodium causes malaria.
- C: Incorrect — Trypanosoma causes sleeping sickness.
- D: Incorrect — Giardia causes giardiasis.
Q59. Amoeba moves by:
- A. Flagella
- B. Pseudopodia
- C. Cilia
- D. None
Answer: B
- A: Incorrect.
- B: Correct — Amoeba moves using pseudopodia.
- C: Incorrect — cilia in Paramecium.
- D: Incorrect.
Q60. Paramecium moves by:
- A. Pseudopodia
- B. Flagella
- C. Cilia
- D. None
Answer: C
- A: Incorrect — pseudopodia in Amoeba.
- B: Incorrect — flagella in Euglena.
- C: Correct — cilia help Paramecium move.
- D: Incorrect.
Q61. Slime moulds are unique because:
- A. Amoeboid in vegetative stage
- B. Reproduce like fungi
- C. Both A and B
- D. Plant-like with chlorophyll
Answer: C
- A: Partly correct.
- B: Partly correct.
- C: Correct — amoeboid nutrition + fungal reproduction.
- D: Incorrect.
Q62. Slime mould aggregation is called:
- A. Mycelium
- B. Pseudoplasmodium
- C. Fruiting body
- D. Thallus
Answer: B
- A: Incorrect — fungi.
- B: Correct — pseudoplasmodium is characteristic.
- C: Incorrect — fruiting body forms later.
- D: Incorrect.
Q63. Euglenoids have:
- A. Cellulose wall
- B. Silica wall
- C. Pellicle
- D. Chitin wall
Answer: C
- A: Incorrect.
- B: Incorrect.
- C: Correct — flexible pellicle instead of cell wall.
- D: Incorrect.
Q64. Amoebic dysentery is caused by:
- A. Giardia
- B. Plasmodium
- C. Entamoeba histolytica
- D. Leishmania
Answer: C
- A: Incorrect.
- B: Incorrect.
- C: Correct — Entamoeba histolytica.
- D: Incorrect.
Q65. Food reserve in diatoms is:
- A. Starch
- B. Laminarin and oil
- C. Glycogen
- D. Protein
Answer: B
- A: Incorrect — starch in plants.
- B: Correct — diatoms store laminarin and oil.
- C: Incorrect — glycogen in fungi/animals.
- D: Incorrect.
Q66. Sleeping sickness is transmitted by:
- A. Housefly
- B. Tsetse fly
- C. Female Anopheles
- D. Sandfly
Answer: B
- A: Incorrect.
- B: Correct — Tsetse fly transmits Trypanosoma.
- C: Incorrect — Anopheles spreads malaria.
- D: Incorrect — Sandfly spreads kala-azar.
Q67. Diatomaceous earth is used in:
- A. Filters and insecticides
- B. Fertilizers
- C. Antibiotics
- D. Protein supplements
Answer: A
- A: Correct — porous silica shells useful in filters and abrasives.
- B: Incorrect.
- C: Incorrect.
- D: Incorrect — Spirulina is a protein supplement.
Q68. Alternation of generations is shown by:
- A. Euglena
- B. Paramecium
- C. Diatoms
- D. Amoeba
Answer: C
- A: Incorrect.
- B: Incorrect.
- C: Correct — diatoms show alternation of generations.
- D: Incorrect.
Q69. Plasmodium multiplies in human RBCs by:
- A. Sporogony
- B. Schizogony
- C. Gametogony
- D. Conjugation
Answer: B
- A: Incorrect — sporogony in mosquito.
- B: Correct — schizogony in humans.
- C: Incorrect — gametogony in mosquito.
- D: Incorrect.
Q70. Conjugation occurs in:
- A. Amoeba
- B. Paramecium
- C. Euglena
- D. Plasmodium
Answer: B
- A: Incorrect.
- B: Correct — Paramecium shows conjugation.
- C: Incorrect.
- D: Incorrect.
Q71. Kala-azar is caused by:
- A. Leishmania
- B. Plasmodium
- C. Trypanosoma
- D. Giardia
Answer: A
- A: Correct — Leishmania donovani.
- B: Incorrect.
- C: Incorrect.
- D: Incorrect.
Q72. Giardia lamblia causes:
- A. Dysentery
- B. Giardiasis
- C. Malaria
- D. Sleeping sickness
Answer: B
- A: Incorrect.
- B: Correct — intestinal giardiasis.
- C: Incorrect.
- D: Incorrect.
Q73. Amoeba engulfs food by:
- A. Diffusion
- B. Endocytosis (phagocytosis)
- C. Osmosis
- D. Active transport
Answer: B
- A: Incorrect.
- B: Correct — phagocytosis.
- C: Incorrect.
- D: Incorrect.
Q74. Many parasitic protists require:
- A. One host
- B. Two hosts
- C. No host
- D. Plant host only
Answer: B
- A: Incorrect — not common.
- B: Correct — e.g., Plasmodium requires human + mosquito.
- C: Incorrect.
- D: Incorrect.
Q75. Protists are ecologically important because they:
- A. Form plankton base in aquatic food chains
- B. Fix nitrogen
- C. Decompose lignin
- D. None of these
Answer: A
- A: Correct — protistan algae like diatoms form the base of aquatic food webs.
- B: Incorrect — nitrogen fixation is by bacteria.
- C: Incorrect — lignin decomposition is by fungi.
- D: Incorrect.