WB Board is conducting the Class 12 Biological Science Board Exam 2026 on February 20, 2026. Class 12 Biological Science Question Paper with Solution PDF is available here for download.

The official question paper of WB Board Class 12 Biological Science Board Exam 2026 is provided below. Students can download the official paper in PDF format for reference.

WB Board Class 12 2026 Biological Science Question Paper with Solution PDF

WB Board Class 12 2026 Biological Science Question Paper with Solution PDF Download PDF Check Solutions
Question 1:

The basic unit of life is —

  • (A) Tissue
  • (B) Cell
  • (C) Organ
  • (D) Organ system
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Question 2:

DNA is mainly located in the —

  • (A) Cytoplasm
  • (B) Nucleus
  • (C) Ribosome
  • (D) Cell membrane
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Question 3:

Photosynthesis occurs in —

  • (A) Mitochondria
  • (B) Chloroplast
  • (C) Nucleus
  • (D) Vacuole
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Question 4:

Which hormone regulates blood sugar level?

  • (A) Thyroxine
  • (B) Insulin
  • (C) Adrenaline
  • (D) Estrogen
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Question 5:

The process by which plants lose water vapor is called —

  • (A) Respiration
  • (B) Transpiration
  • (C) Photosynthesis
  • (D) Diffusion
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Question 6:

Describe the structure and functions of the cell membrane.

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Question 7:

Explain the process of photosynthesis with the help of a diagram.

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Question 8:

Write the differences between mitosis and meiosis.

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Question 9:

Describe the structure and functions of the human heart.

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Question 10:

Explain the role of hormones in the human body with examples.

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WB Board Class 12 Biological Science 2026 Question Paper with Solution PDF