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Assertion (A): Rosie… (Class 12 Biology SQP 2025-26, Q16)

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BiologyCBSE Class 12 · Sample paper, session 2025-26 · 1 mark · Assertion-reason

CBSE Class 12 Biology sample paper 2025-26: question 16

From the official CBSE sample question paper for 2025-26, section A, question 16, for 1 mark. Try it first; the hints and our step-by-step solution are below.

Q16 · 1 mark · Assertion-reasonCompetency-basedBiotechnology and its Applications

Assertion (A): Rosie was the first transgenic cow to make more nutritionally balanced milk for consumption by human babies.
Reason (R): The milk of Rosie cow contained human beta- lactalbumin which made the milk rich in protein.

  1. (A)Both A and R are true and R is the correct explanation of A.
  2. (B)Both A and R are true and R is not the correct explanation of A.
  3. (C)A is true but R is false.
  4. (D)A is False but R is true.

Source: official sample paper from cbseacademic.nic.in (PDF). See it in the full Sample paper 2025-26.

Hints

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

Hint 1

Recall the exact protein in Rosie's milk.

Hint 2

Alpha or beta?

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 is true: Rosie (1997) produced more nutritionally balanced milk for human babies.

  2. R is false: her milk contained human alpha-lactalbumin (2.4 g/L), not beta-lactalbumin. Answer (C).

    1 mark

Answer: (C) A true, R false

Where the marks are

  • Identifies alpha-lactalbumin, so R false (1 mark)

Revise the chapter

Practise this chapterBoard-style questions from Biotechnology and its Applications, one at a time, marked against the answer key and marking points.Back to the full paperSample paper 2025-26: 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.