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Identify A, B, C, D, E and F… (Class 12 Biology 2024, Q25)

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BiologyCBSE Class 12 · Board exam 2024, set 57/1/1 · 3 marks · Short answer

CBSE Class 12 Biology 2024: question 25

Set in the CBSE Class 12 board exam of 2024, paper 57/1/1, section C, question 25, for 3 marks. Try it first; the hints and our step-by-step solution are below.

Q25 · 3 marks · Short answerHuman Health and Disease

Identify A, B, C, D, E and F in the table given below :

Name of Human DiseaseCausative OrganismSymptoms
PneumoniaStreptococcus'A'
Typhoid'B'High fever, weakness, headache, stomach pain
Common ColdRhino virus'C'
Ringworm'D'Dry scaly lesions on body parts, redness, itching
AscariasisAscaris'E'
'F'Entamoeba histolyticaConstipation, cramps, stools with mucous and blood clots

Source: official question paper from cbse.gov.in (PDF). See it in the full 2024 board paper, set 57/1/1.

Hints

Open one hint at a time and try again before the next.

Hint 1

Pneumonia and the common cold both affect the respiratory tract, but one infects the alveoli.

Hint 2

Ringworm is caused by fungi, and Entamoeba causes a form of dysentery.

Step-by-step solution

Each step shows the marks it earns, as an examiner would award them. Checked by an independent re-solve from the question paper.

  1. A (pneumonia symptoms): fever, chills, cough, headache; in severe cases the lips and fingernails turn grey to bluish.

    ½ mark

  2. B: Salmonella typhi.

    ½ mark

  3. C (common cold symptoms): nasal congestion and discharge, sore throat, hoarseness, cough, headache, tiredness.

    ½ mark

  4. D: fungi of the genera Microsporum, Trichophyton or Epidermophyton.

    ½ mark

  5. E (ascariasis symptoms): internal bleeding, muscular pain, fever, anaemia and blockage of the intestinal passage.

    ½ mark

  6. F: amoebiasis (amoebic dysentery).

    ½ mark

Answer: A – fever, chills, cough, headache, bluish lips/nails; B – Salmonella typhi; C – nasal congestion, sore throat, cough; D – Microsporum/Trichophyton/Epidermophyton; E – internal bleeding, anaemia, intestinal blockage; F – Amoebiasis

Where the marks are

  • Each correct identification A–F (½ × 6 marks)

Revise the chapter

Practise this chapterBoard-style questions from Human Health and Disease, one at a time, marked against the answer key and marking points.Back to the full paper2024 board paper, set 57/1/1: every question, by section.

The question is transcribed from the official paper; figures are described in words. The solution, hints and chapter tag are ours. Spotted an error? Write tosupport@questionbuddy.in.