- Microsporum is a fungus that causes Ringworm (Tinea infections). - Filaria is caused by Wuchereria bancrofti. - Typhoid is caused by Salmonella typhi. - Malaria is caused by Plasmodium species.
02
PYQ 2024
medium
zoologyID: ts-eamce
Assertion (A): Wuchereria bancrofti is an intercellular parasite. Reason (R): It lives among the cells of the tissues of the host.
1
Both (A) and (R) are correct, and (R) is the correct explanation of (A).
2
Both (A) and (R) are correct, but (R) is not the correct explanation of (A).
3
(A) is correct, but (R) is incorrect.
4
(A) is incorrect, but (R) is correct.
Official Solution
Correct Option: (1)
Step 1: Understanding Wuchereria bancrofti
- Wuchereria bancrofti is an intercellular parasite that causes Filariasis. - It lives among the cells of tissues, specifically in lymphatic vessels, which explains (A).
03
PYQ 2025
medium
zoologyID: ts-eamce
Match the following:
1
A - II, B - I, C - V, D - III
2
A - IV, B - I, C - II, D - III
3
A - III, B - IV, C - I, D - V
4
A - III, B - V, C - I, D - II
Official Solution
Correct Option: (4)
Step 1: Match Specific Characteristics:
C. Mouth with three chitinous lips: This is the most diagnostic feature of Ascaris lumbricoides (Roundworm), which has a triradiate mouth guarded by one dorsal and two ventrolateral lips. Therefore, C I.
D. Nocturnal periodicity: The larvae (Microfilariae) of Wuchereria bancrofti reside in deep blood vessels during the day and migrate to peripheral circulation at night ( ) to coincide with the feeding habit of the vector (Culex mosquito). Therefore, D II.
B. Ovoviviparous: Female Wuchereria does not lay eggs but releases juveniles (microfilariae) directly. This condition is called ovoviviparity. Therefore, B V (Female Wuchereria).
A. Curved posterior end: Sexual dimorphism in nematodes often involves the male having a curved tail with copulatory spicules. Thus, this description applies to Male Wuchereria. Therefore, A III.
Step 2: Final Sequence: A - III, B - V, C - I, D - IIOption (D)
04
PYQ 2025
medium
zoologyID: ts-eamce
Study the following and pick up the incorrect statements:
I. Plasmodium secrete histolysin to penetrate into liver cells of man
II. Syngamy in Plasmodium is isogamy
III. Plasmodium malariae causes quartan malaria
IV. Malaria can be cured by quinine
1
I, III
2
II, IV
3
III, IV
4
I, II
Official Solution
Correct Option: (4)
Step 1: Analyze Statement I:
The statement claims \Plasmodium secretes histolysin. In parasitology, the enzyme histolysin is specifically associated with the trophozoites of \Entamoeba histolytica, which use it to dissolve intestinal wall tissues (histolysis). While \Plasmodium sporozoites do penetrate liver cells, they generally use secretions from their apical complex (like circumsporozoite protein interactions), and "histolysin" is not the standard term used for malarial penetration. Thus, this statement is Incorrect. Step 2: Analyze Statement II:
Syngamy refers to the fusion of gametes. In \Plasmodium, this occurs in the stomach of the mosquito vector. The gametes involved are:
Microgamete: Small, motile (flagellated).
Macrogamete: Large, non-motile.
Since the fusing gametes are morphologically distinct, the process is Anisogamy, not Isogamy. Thus, this statement is Incorrect. Step 3: Analyze Statement III:
\Plasmodium malariae completes its erythrocytic schizogony cycle every 72 hours. This leads to fever spikes every fourth day (Day 1, Day 4, etc.). This type of malaria is clinically termed Quartan Malaria. Thus, this statement is Correct. Step 4: Analyze Statement IV:
Quinine, an alkaloid extracted from the bark of the \Cinchona tree, acts as a blood schizonticide and has been a historical and effective cure for malaria. Thus, this statement is Correct. Step 5: Conclusion:
Statements I and II are incorrect. This matches Option (D).
Consider the following statements Statement I: In the crop of female {Anopheles}, microgametes of {Plasmodium} are separated from the microgametocyte by ex-flagellation. Statement II: Schuffner's dots are believed to be the antigens released by {Plasmodium}. The correct answer is
1
Both statements I and II are true
2
Both statements I and II are false
3
statement I is true, but statement II is false
4
statement I is false, but statement II is true
Official Solution
Correct Option: (1)
Concept: This concerns the sexual phase of the malaria parasite's life cycle in the mosquito and its pathology in the human host.
Explanation: Statement I is true: Exflagellation (the release of microgametes) occurs in the mosquito's midgut (crop). Statement II is true: Schuffner's dots are believed to be vesicles containing antigenic proteins, transported from the parasite to the surface of the infected red blood cell.
07
PYQ 2025
medium
zoologyID: ts-eamce
Match the following
1
A-II, B-V, C-III, D-I
2
A-II, B-IV, C-V, D-III
3
A-I, B-V, C-IV, D-II
4
A-III, B-I, C-IV, D-II
Official Solution
Correct Option: (2)
Concept: This requires matching {Plasmodium} life cycle stages with their locations.
Explanation: A. Pre-erythrocytic cycle (tissue phase) occurs in the Liver cells of man (II). B. Cycle of Golgi (Erythrocytic cycle) occurs in Erythrocytes of man (IV). C. Sporogony (formation of sporozoites) occurs on the Wall of crop of mosquito (V). D. Gametogony (formation of gametes) involves exflagellation which is completed in the Crop of mosquito (III).
08
PYQ 2025
medium
zoologyID: ts-eamce
Consider the following statements: Assertion (A): Entamoeba histolytica is a cytozoic parasite Reason (R): It lives in the mucosa and submucosa of large intestine of man
1
Both (A) and (R) are true, (R) is the correct explanation of (A)
2
Both (A) and (R) are true, (R) is not the correct explanation of (A)
3
(A) is true, but (R) is false
4
(A) is false, but (R) is true
Official Solution
Correct Option: (1)
Entamoeba histolytica is a cytozoic parasite because it ingests host cells and lives in the tissue (mucosa and submucosa) of the large intestine. The Reason correctly explains the Assertion.
