🧬

Biology — Stream SX/SB

Molecular biology, evolution, biotechnology, and advanced ecology for Class 12 / college

Key Concepts
  • Molecular genetics and inheritance
  • Human physiology across the organ systems
  • Ecology and ecosystems
  • Biotechnology and its applications
Important Formulae
Hardy–Weinberg p² + 2pq + q² = 1; p + q = 1
Dihybrid ratio AaBb × AaBb ⇒ 9 : 3 : 3 : 1
Quick Tips
  • Practise genetics problems — they are common and scoring.
  • Connect physiology topics (e.g. how systems work together) for applied questions.
Sample Practice Questions

  1. The phenotypic ratio of a monohybrid cross (Aa × Aa) is:

    • 1:1
    • 3:1
    • 9:3:3:1
    • 1:2:1
    Show answer

    Answer: 3:1

  2. In DNA, the base adenine pairs with:

    • Guanine
    • Cytosine
    • Thymine
    • Uracil
    Show answer

    Answer: Thymine

  3. The structural and functional unit of the kidney is the:

    • Neuron
    • Nephron
    • Alveolus
    • Villus
    Show answer

    Answer: Nephron

  4. Which hormone lowers blood glucose levels?

    • Glucagon
    • Insulin
    • Adrenaline
    • Thyroxine
    Show answer

    Answer: Insulin

Practise more questions →
Practice Questions

Practise KVPY questions on Biology — Stream SX/SB. Answers are revealed after each question.

Start Practice →
Biology