MCQs

1. Kingdom Protista includes mainly:
(a) Multicellular prokaryotes (b) Single-celled eukaryotes (c) Multicellular fungi (d) Non-cellular organisms

2. Members of Protista are primarily:
(a) Terrestrial (b) Desert organisms (c) Aquatic (d) Parasitic only

3. Protists possess:
(a) No nucleus (b) Membrane-bound organelles (c) Only cell wall (d) No organelles

4. Protists reproduce sexually by:
(a) Binary fission only (b) Budding (c) Cell fusion and zygote formation (d) Fragmentation

5. Chrysophytes include:
(a) Euglenoids and slime moulds (b) Diatoms and golden algae (c) Protozoans and fungi (d) Cyanobacteria and algae

6. Diatoms are important because they are :
(a) Chief consumers in oceans (b) Chief producers in oceans (c) Parasites (d) Decomposers only

7. The cell wall of diatoms contains:
(a) Cellulose (b) Chitin (c) Silica (d) Protein

8. Accumulated deposits of diatom walls form:
(a) Coral reefs (b) Limestone (c) Diatomaceous earth (d) Humus

9. Diatomaceous earth is commonly used in:
(a) Photosynthesis (b) Nitrogen fixation (c) Filtration and polishing (d) Respiration

10. Dinoflagellates are mostly:
(a) Freshwater parasites (b) Marine and photosynthetic (c) Saprophytic fungi (d) Terrestrial organisms

11. The cell wall of dinoflagellates is made up of:
(a) Chitin plates (b) Silica shells (c) Cellulose plates (d) Protein layer

12. Red tides in seas are caused by:
(a) Euglenoids (b) Slime moulds (c) Red dinoflagellates (d) Cyanobacteria

13. Which dinoflagellate commonly causes red tides?
(a) Euglena (b) Gonyaulax (c) Amoeba (d) Paramecium

14. Euglenoids lack:
(a) Flagella (b) Chlorophyll (c) Cell wall (d) Nucleus

15. The flexible covering in Euglena is called:
(a) Pellicle (b) Capsule (c) Cellulose wall (d) Silica shell

16. Euglenoids behave as heterotrophs when:
(a) Water is absent (b) Sunlight is absent (c) Oxygen is absent (d) Food is abundant

17. Slime moulds are:
(a) Photosynthetic (b) Saprophytic protists (c) Chemosynthetic bacteria (d) Animal parasites only

18. The aggregation formed by slime moulds is called:
(a) Mycelium (b) Colony (c) Plasmodium (d) Pellicle

19. Amoeba moves with the help of:
(a) Flagella (b) Cilia (c) Pseudopodia (d) Tentacles

20. Entamoeba is an example of:
(a) Free-living protozoan (b) Photosynthetic protist (c) Parasitic amoeboid protozoan (d) Dinoflagellate

21. Sleeping sickness is caused by:
(a) Plasmodium (b) Amoeba (c) Trypanosoma (d) Paramecium

22. Ciliated protozoans move using:
(a) Pseudopodia (b) Flagella (c) Cilia (d) Wings

23. Example of a ciliated protozoan:
(a) Euglena (b) Paramecium (c) Amoeba (d) Plasmodium

24. The malarial parasite belongs to:
(a) Amoeboids (b) Flagellates (c) Ciliates (d) Sporozoans

25. Malaria is caused by:
(a) Trypanosoma (b) Entamoeba (c) Plasmodium (d) Euglena