Skip to content

(i) Expand the abbreviations… (Class 12 Biology 2023, Q28a)

questionbuddy.in/q/cbse-12-biology-2023-57-1-1-q28a-expand-abbreviations-used-different-modes

BiologyCBSE Class 12 · Board exam 2023, set 57/1/1 · 3 marks · Short answer

CBSE Class 12 Biology 2023: question 28(a)

Set in the CBSE Class 12 board exam of 2023, paper 57/1/1, section C, question 28(a), for 3 marks. Try it first; the hints and our step-by-step solution are below.

Q28(a) · 3 marks · Short answerReproductive Health

(i) Expand the abbreviations given below, used for different modes of assisted reproductive technologies : (2)
(1) ZIFT (2) ICSI (3) IUT (4) GIFT
(ii) Which one of them cannot be considered as a procedure of IVF ? Give reasons in support of your answer. (1)

Source: official question paper from cbse.gov.in (PDF). See it in the full 2023 board paper, set 57/1/1.

Hints

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

Hint 1

Each abbreviation describes what is transferred or injected, and where.

Hint 2

In which technique are unfertilised gametes, not a zygote, placed in the body?

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. (i) (1) ZIFT – Zygote Intra Fallopian Transfer

    ½ mark

  2. (2) ICSI – Intra Cytoplasmic Sperm Injection

    ½ mark

  3. (3) IUT – Intra Uterine Transfer

    ½ mark

  4. (4) GIFT – Gamete Intra Fallopian Transfer

    ½ mark

  5. (ii) GIFT cannot be considered an IVF procedure.

    ½ mark

  6. Reason: in GIFT, the ovum and sperm (gametes) are transferred into the fallopian tube, where fertilisation occurs naturally inside the body (in vivo). In IVF, fertilisation takes place outside the body and the zygote or embryo is then transferred.

    ½ mark

Answer: (i) Zygote Intra Fallopian Transfer; Intra Cytoplasmic Sperm Injection; Intra Uterine Transfer; Gamete Intra Fallopian Transfer; (ii) GIFT – fertilisation occurs in vivo in the fallopian tube

Where the marks are

  • Four correct expansions (½ × 4 marks)
  • Identifies GIFT (½ mark)
  • Reason: fertilisation in vivo in the fallopian tube, not in vitro (½ mark)

Revise the chapter

Practise this chapterBoard-style questions from Reproductive Health, one at a time, marked against the answer key and marking points.Back to the full paper2023 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.