100+ Free Assam HS Class 11-12 Biology Practice Questions
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Key Facts: Assam HS Class 11-12 Biology Exam
70 / 30
Marks ratio between board written theory exam and practical assessment
ASSEB Curriculum Framework
6
Major core thematic units in Higher Secondary Biology syllabus
ASSEB Biology Textbook
9:3:3:1
Classic Mendelian dihybrid phenotypic ratio in F2 generation
Genetics Curriculum
100
High-quality practice MCQs included in this OpenExamPrep bank
OpenExamPrep
Assam ASSEB HS Biology evaluates Class 11-12 students across reproduction, molecular genetics, evolutionary biology, biotechnology, human health, and ecosystem ecology to build a strong foundation for board success and competitive medical entrance exams like NEET.
Sample Assam HS Class 11-12 Biology Practice Questions
Try these sample questions to test your Assam HS Class 11-12 Biology exam readiness. Each question includes a detailed explanation. Start the interactive quiz above for the full 100+ question experience with AI tutoring.
1What is the ploidy level of the functional megaspore and the primary endosperm nucleus (PEN) in a typical angiosperm, respectively?
2In a mature 7-celled, 8-nucleate female gametophyte (embryo sac) of angiosperms, which cells are located at the chalazal end?
3Which specialized structure present in synergids guides the entry of the pollen tube into the embryo sac?
4What term describes the phenomenon where seeds are formed without fertilization in certain species like Asteraceae and grasses?
5Which layer of the microsporangium wall provides nourishment to the developing microspores (pollen grains)?
6What type of pollination occurs when pollen grains are transferred from the anther to the stigma of another flower on the same plant?
7Which part of the ovule represents the basal part opposite to the micropylar end?
8Water hyacinth (Eichhornia crassipes) and water lily are aquatic plants. How are these plants typically pollinated?
9Exine, the outer hard layer of a pollen grain, is made up of which highly resistant organic material?
10In castor and maize seeds, endosperm persists in the mature seed to provide nutrition to the developing seedling. What are such seeds called?
About the Assam HS Class 11-12 Biology Exam
The ASSEB Higher Secondary Biology examination tests Class 11 and 12 Science stream students on core biological sciences including plant and human reproduction, classical and molecular genetics, evolutionary principles, human health and immunology, industrial biotechnology, and environmental ecology.
Assessment
The ASSEB HS Biology examination consists of a 3-hour theory paper (70 marks) evaluated alongside practical examinations (30 marks). The theory exam features multiple-choice objective questions, short conceptual questions, and structured long answer questions across prescribed units.
Time Limit
3 hours
Passing Score
30% aggregate
Exam Fee
Standard ASSEB higher secondary examination fee (Assam State School Education Board (ASSEB))
Assam HS Class 11-12 Biology Exam Content Outline
Unit 1: Reproduction in Organisms & Flowering Plants
Modes of reproduction, microsporogenesis, megasporogenesis, pollination mechanisms, double fertilization, apomixis, and seed development.
Unit 2: Human Reproduction & Reproductive Health
Male and female reproductive anatomy, gametogenesis, menstrual cycle, fertilization, embryonic development, pregnancy, lactation, contraception, and assisted reproductive technologies (ART).
Unit 3: Genetics & Molecular Basis of Inheritance
Mendelian inheritance, linkage and crossing over, sex determination, genetic disorders, DNA replication, transcription, genetic code, translation, lac operon, DNA fingerprinting, and Human Genome Project.
Unit 4: Evolution & Human Health and Disease
Origin of life, Darwinian evolution, Hardy-Weinberg equilibrium, human evolution, common human pathogens, immunity types, vaccines, AIDS, cancer, and drug abuse.
Unit 5: Microbes in Human Welfare & Biotechnology
Role of microbes in household products, industrial fermentation, sewage treatment, biofertilizers, recombinant DNA technology, restriction enzymes, vectors, PCR, Bt crops, gene therapy, and biosafety.
Unit 6: Ecology, Ecosystems & Biodiversity
Organism adaptations, population dynamics, ecosystem structure, productivity, energy flow, ecological pyramids, biodiversity hotspots, threats, and conservation strategies.
How to Pass the Assam HS Class 11-12 Biology Exam
What You Need to Know
- Passing score: 30% aggregate
- Assessment: The ASSEB HS Biology examination consists of a 3-hour theory paper (70 marks) evaluated alongside practical examinations (30 marks). The theory exam features multiple-choice objective questions, short conceptual questions, and structured long answer questions across prescribed units.
- Time limit: 3 hours
- Exam fee: Standard ASSEB higher secondary examination fee
Keys to Passing
- Complete 500+ practice questions
- Score 80%+ consistently before scheduling
- Focus on highest-weighted sections
- Use our AI tutor for tough concepts
Assam HS Class 11-12 Biology Study Tips from Top Performers
Frequently Asked Questions
What is the syllabus structure for Assam ASSEB HS Biology?
The syllabus is structured around six core modules: Sexual Reproduction in Flowering Plants, Human Reproduction & Health, Genetics & Molecular Biology, Evolution & Human Disease, Biotechnology Principles & Applications, and Ecology & Biodiversity Conservation.
What is the passing criteria for ASSEB HS Biology?
Students must achieve a minimum of 30% marks in theory and practical components separately to pass the Biology subject examination.
What is double fertilization in angiosperms?
Double fertilization is a unique flowering plant mechanism where one male gamete fertilizes the egg cell to form a diploid zygote (syngamy), while the second male gamete fuses with two polar nuclei to form a triploid primary endosperm nucleus (triple fusion).
What is the significance of the lac operon model?
Formulated by Jacob and Monod, the lac operon model explains gene regulation in prokaryotes (E. coli), illustrating how an inducible system turns metabolic genes on or off depending on lactose availability.
How does RNA interference (RNAi) protect plants from pests?
RNAi involves silencing specific mRNA expression using complementary double-stranded RNA (dsRNA), preventing translation of parasite-essential genes, such as targeting the nematode Meloidogyne incognita in tobacco plants.
What is the difference between ex-situ and in-situ biodiversity conservation?
In-situ conservation protects species within their natural habitats (e.g., Kaziranga National Park, Manas Biosphere Reserve), whereas ex-situ conservation protects threatened species outside their natural habitat (e.g., botanical gardens, seed banks, zoological parks).