Free Kingdom Protista MCQs with Answers

231. The cell wall of fungus like protista is composed of:

• A. Chitin
• B. Cellulose
• C. Murein
• D. Lignin

Explanation: The cell wall of fungus like protista is composed of chitin.

232. All of the following belong to phylum Protista except:

• A. Protomycota
• B. Gymnomycota
• C. Oomycota
• D. Deuteromycota

Explanation: Phylum Deuteromycota is a polyphyletic group of asexually-reproducing fungi that do not display a sexual phase; they are known as imperfect.

233. Balantidium coli lives in the intestinal tract of:

• A. Pigs and rats
• B. Pigs and monkeys
• C. Rats and dogs
• D. Cats and sheep

Explanation: Swine are the primary reservoir hosts of Balantidium coli. Humans can also be reservoirs, and other potential animal hosts include non-human primates. Balantidium coli is a normal inhabitant of the cecum and colon of non-human primates and pigs.Mode of Transmission:Balantidium coli is transmitted through the fecal-oral route. Humans can become infected by eating and drinking contaminated food and water that has come into contact with infective animal or human fecal matter.Signs and Symptoms:Balantidium coli infects the large intestine in humans and produces infective microscopic cysts that are passed in the feces, potentially leading to re-infection or infection of others. Immune-compromised people are the most likely to experience more severe signs and symptoms. These include persistent diarrhea, dysentery, abdominal pain, weight loss, nausea, and vomiting. If left untreated, perforation of the colon can occur.

234. Termites cut wood with the help of enzyme produced by

• A. Trichonella
• B. Tripanosoma
• C. Trichonympha
• D. Trichina

Explanation: Although termites are insects that eat wood, they are not capable of digesting wood on their own. Endosymbionts that live within the intestines of the termite assist in converting the wood into nutrients that the termite can digest. One of the several types of endosymbionts that live inside the termite is single-celled organisms called Trichonympha (protozoa). Trichonympha has the enzymes needed to convert cellulose in wood into starches and sugars that the termite can use as nutrients.

235. A protist that forms sea-weeds is:

• A. Red algae
• B. Brown algae
• C. Green algae
• D. Diatoms

Explanation: The brown algae comprise the class Phaeophyceae, golden-brown algae that range from small filamentous forms to large, complex seaweeds. These organisms are important as food and as habitat for many aquatic animals. Kelps (large brown seaweeds), for example, create a kelp forest that serves as a habitat for small marine animals.

236. Best known "Apicomplex" is the:

• A. Obligate parasites
• B. Facultative parasite
• C. Malarial parasites
• D. Pathogenic parasites

Explanation: Apicomplexan, also called sporozoan, are protozoan of the (typically) spore-producing phylum Apicomplexa. All apicomplexans are parasitic and lack contractile vacuoles and locomotor processes.Malaria is caused by a single-celled parasite of the genus Plasmodium. The malarial parasite, plasmodium, is the best-known apicomplexa. All Plasmodium species share a similar life cycle. It has two parts-in the first, the parasite infects a person (or a vertebrate host), and in the second, it is transmitted from the malaria patient (or infected vertebrate host) to another host by an insect vector.

237. Kelps are:

• A. Diatoms
• B. Red-algae
• C. Green-algae
• D. Brown-algae

Explanation: Kelps are brown algae, known for their large size and complex structure, often forming dense underwater forests in cold oceanic regions. These forests provide critical habitat and resources for marine organisms. In contrast, diatoms are small, silica-walled algae, red algae are smaller and have a distinct red pigment, and green algae do not reach the size or complexity of kelps.

238. Which of the locomotor organ would likely be the shortest?

• A. A flagellum
• B. A cillium
• C. An extended pseudopod
• D. A pellicle

Explanation: Pellicle is a thick cuticle and it is not a locomotor organ so option D is incorrect. Whereas pseudopods are cytoplasmic extensions. Among ciliium and flagellum, option B is correct since cilium is shorter in comparison.

239. Poisonous red-tides in coastal area are caused by the blooms

• A. Euglenoids
• B. Rhodophyta
• C. Diatoms
• D. Dinoflagellates

Explanation: Poisonous red tides are caused by algae so the correct option is D i.e Dinoflagellates

240. Acetabularia mediterranea is:

• A. A fungus
• B. An algae
• C. A protozoan
• D. A prokaryote

Explanation: Students should learn that Acetabularia Mediterranea is a green algae