Protists Knowledge-Based Download PDF

Questions

1. 1.

   Which of the following protist groups is characterized by nuclear dualism, possessing a diploid micronucleus that functions in sexual recombination and a polyploid macronucleus that controls general cellular metabolism?

   • A) Ciliates
   • B) Dinoflagellates
   • C) Amoebozoans
   • D) Euglenozoans
2. 2.

   Which of the following parasitic protists belongs to the phylum Apicomplexa, lacks specialized locomotor structures in its mature form, and is the causative agent of malaria?

   • A) Trypanosoma brucei
   • B) Giardia lamblia
   • C) Entamoeba histolytica
   • D) Plasmodium falciparum
3. 3.

   Which of the following groups of photosynthetic protists is characterized by having a rigid, two-part cell wall composed primarily of silica (hydrated silicon dioxide)?

   • A) Dinoflagellates
   • B) Euglenids
   • C) Green algae
   • D) Diatoms
4. 4.

   Which of the following protists is classified as a mixotroph because it carries out photosynthesis in the presence of sunlight but can switch to heterotrophic nutrition by absorbing dissolved organic compounds when light is absent?

   • A) Amoeba proteus
   • B) Euglena gracilis
   • C) Paramecium caudatum
   • D) Plasmodium falciparum
5. 5.

   Which of the following cellular structures is primarily responsible for preventing freshwater protists, such as Amoeba and Paramecium, from lysing due to the continuous osmotic influx of water?

   • A) Food vacuole
   • B) Pellicle
   • C) Micronucleus
   • D) Contractile vacuole