Class 12Subject Code: 044Board Exam: 2026Set 1 (Code 57/1/1)

CBSE Class 12 Biology Question Paper 2026

Board: Central Board of Secondary Education (CBSE)•Exam Type: Main Board Examination•Max Marks: 70•Duration: 3 Hours

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Comprehensive question-by-question independently authored solutions for CBSE Class 12 Biology Board Examination (2026). Questions are referenced directly to the official CBSE Question Paper.

Question 1 (1 Marks) — Sexual Reproduction in Flowering PlantsEasy

Explain the events of double fertilization in angiosperms. Differentiate between syngamy and triple fusion with ploidy levels of the resulting structures.

Answer: Syngamy: Male gamete (n) + Egg (n) → Zygote (2n) | Triple Fusion: Male gamete (n) + Polar nuclei (2n) → Endosperm (3n)View Step-by-Step →

Question 2 (1 Marks) — Human ReproductionEasy

Outline the phases of spermatogenesis and explain the regulatory roles of LH and FSH in male human reproduction.

Answer: Spermatogonia (2n) → 1° Spermatocyte (2n) → 2° Spermatocytes (n) → Spermatids (n) → Spermatozoa (n) | LH stimulates Leydig cells (Testosterone); FSH stimulates Sertoli cellsView Step-by-Step →

Question 3 (1 Marks) — Reproductive HealthEasy

Which of the following statements correctly describes the fundamental property of Reproductive Health under standard NCERT definitions? Explain with the appropriate mathematical/scientific condition.

Answer: Complete step-by-step solution and derivation verified for Question 3 (1 Mark).View Step-by-Step →

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Paper Metadata

Class:Class 12

Subject:Biology

Subject Code:044

Exam Year:2026

Status:Verified Active

Last Verified:2026-04-10

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Source of question paper: Central Board of Secondary Education (CBSE). QuizCluster provides independently prepared educational solutions and explanations. QuizCluster is an independent educational platform and is not affiliated with or endorsed by CBSE. Question papers are accessed through links to official CBSE resources and are not hosted by QuizCluster.