Protozoans (GATE)
Comprehensive test of protozoan biology including classification, locomotion, life cycles, and characteristics of major protozoan groups such as Amoeba, Plasmodium, Trypanosoma, and Entamoeba.
Questions
Which of the following pairs of protozoan and its discoverer is/are incorrect?
- Amoeba : R. V. Rosenhof
- Plasmodium : Charles Laverson
- Entamoeba : Lamble
- Only 1
- Only 2
- Only 3
- 1 and 2
- 2 and 3
Which of the following types of flagella is found in Euglena?
- Stichonematic
- Pantonematic
- Acronematic
- Penta-chronematic
- Simple
Which of the following statements are true regarding 'Trypanosoma gambiense'?
P. Endoparasite of blood and cerebrospinal fluid of man
Q. Tse-tse fly acts as a secondary host
R. Reserves food material in the form of glycogen
S. Reproduces sexually as well as asexually
- P and Q
- P and S
- Q and R
- Q and S
- R and S
Which of the following is a symbiotic flagellate?
- Trichonympha
- Entamoeba
- Polystomella
- Nyctotherus
- Vorticella
Which of the following statements are false regarding Plasmodium?
P. It is commonly known as malarial parasite.
Q. Female Anopheles mosquito serves as a reservoir host for Plasmodium.
R. Gametophytes of Plasmodium are formed in the lumen of stomach of a mosquito.
S. Zygote of Plasmodium is known as ookinete.
- P and Q
- P and R
- P and S
- Q and R
- R and S
Locomotory organs are not found in which class of organisms?
- Ciliata
- Mastigophora
- Sarcodina
- Sporozoa
- Suctoria
Which of the following is not true regarding Amoeba proteus?
- Discovered by Rossel Von Rosenhof
- Locomotary organ – pseudopodia
- Holozoic mode of nutrition
- Uricotelic in nature
- Respiration through general body surface
Bioluminescence is found in
- Ceratium and Noctiluca
- Euglena and Paramecium
- Glaucoma and Giardia
- Ceratium and Paramecium
- Noctiluca and Giardia
Which of the following sets of protozoa represents endoparasites only?
- Balantidium, Paramecium, Trypanosoma
- Balantidium, Paramecium, Proterospongia
- Balantidium, Giardia, Trypanosoma
- Giardia, Proterospongia, Trypanosoma
- Giardia, Paramecium, Proterospongia
Which of the following are correct regarding Entamoeba histolytica?
P. Digenetic life cycle
Q. Trophozoite is an adult and harmful stage
R. Causes amoebic dysentery in humans
S. Reserve food material is starch
- P and Q
- P and R
- P and S
- Q and R
- R and S
Life cycle(s) of which of the following pathogenic protozoa is/are digenetic?
- Entamoeba histolytica
- Plasmodium vivax
- Trypanosam cruzi
- Only 1
- Only 2
- Only 3
- 1 and 2
- 2 and 3
Which of the following is the most widely accepted theory for locomotion in amoeba?
- Surface tension theory
- Rolling movement theory
- Walking movement theory
- Sol-gel theory
- Fountain-zone theory
Amoeba responds to a number of environmental stimuli. The behaviour may be positive (movement towards the stimuli) or negative (movement away from the stimuli). It shows positive behaviour towards which of the following stimuli?
- Temperature below 20oC and above 25oC
- Water current
- Darkness
- Only 1
- Only 2
- Only 3
- 1 and 2
- 2 and 3
Match the following:
| Column – I | Column – II |
| A. Amoeba | 1. Lobopods |
| B. Radiolaria | 2. Filopods |
| C. Polystomella | 3. Reticulopods |
| D. Actinophyrus | 4. Axopods |
- A - 1, B - 3, C - 2, D - 4
- A - 3, B - 2, C - 4, D - 1
- A - 4, B - 3, C - 2, D - 1
- A - 1, B - 2, C - 3, D - 4
- A - 2, B - 3, C - 1, D - 4
Which of the following statements are incorrect regarding Plasmodium vivax?
P. The duration of exoerythrocytic cyle is 14-15 days.
Q. The duration of erythrocytic cyle is 48 hours.
R. Incubation period is 20-24 days.
S. The duration of sexual cycle is 10 days.
- P and Q
- P and R
- P and S
- Q and R
- Q and S