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Karnataka 2nd PUC Biology Important Questions 2026 can help you revise the syllabus and check your preparation level. These questions are picked from the previous year's question papers. You will find a variety of different types of questions, such as multiple-choice questions, short questions, and long questions based on the marking scheme followed by the board. In the final question paper, the questions will be of 70 marks, carrying the weightage of 1, 2, 3, and 5 marks. In the article below, we have also provided the marks-wise questions. Try to solve these questions after completing the syllabus to analyze your strengths and weaknesses. According to it, you can focus more on the topics that need more attention. While attempting the questions, ensure you add all relevant points and justify the marks. You can go through the article to solve Karnataka 2nd PUC Biology Important Questions 2026.
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Karnataka 2nd PUC Biology Syllabus 2025-26
Karnataka 2nd PUC Biology Important Questions for 1 Mark
Q1. MTPs are legally restricted in our country. Justify by giving reason.
Q2. State the result of David Tilman‟s long term ecosystem experiment.
Q3. Name the part of flower which develops into the fruit after fertilization.
Q4. Statement I: The process of release of sperms from the seminiferous tubule is called spermatogenesis.
Statement II: The spermatids are transformed into spermatozoa by the process called spermiogensis.
Choose the correct answer from the options given below:
- a) Both statement I and statement II are correct
- b) Both statement I and statement II are incorrect
- c) Statement I is correct but statement II is incorrect
- d) Statement I is incorrect but statement II is correct
Q5. Reasons for human population explosion are given below:
- i) Rapid decline in maternal mortality rate.
- ii) Rapid decline in infant mortality rate.
iii) Rapid increase in death rate.
- iv) Increase in the number of people in reproducible age.
Select the correct answer statements from the options given below:
- a) i), ii) and iii) only c) i), ii) and iv) only
- b) b) i) and ii) only d) iii) and iv) only
Q6. Use of bioresources by multinational companies and other organisations without proper authorisation and compensatory payment is referred as
- a) Biopiracy
- b) Biofortification
- c) Bioprospecting
- d) Bioprocessing
Karnataka 2nd PUC Biology Important Questions for 2 Marks
Q1. Briefly explain the significance of David Tilman’s long-term ecosystem experiments using outdoor plots.
Q2. Mention the genotype of parents when their children are born with A, B, AB, O blood groups.
Q3. Write the two basic amino acid residues which are rich in histones.
Q4. Write one advantage and one disadvantage of external fertilization.
Q5. Write the scientific name of organisms causing
- i) Pneumonia ii) Ring worm
Q6.
Draw the structure of an antibody molecule.
Also Read
Karnataka 2nd PUC Biology Exam Pattern 2026
Karnataka 2nd PUC Biology Important Questions for 3 Marks
Q1. In the figure given below, parts A and B show the level of hormones which influence the menstrual cycle. Study the figure and answer the questions that follow:
INSERT IMAGE
- a) Name the organs/glands which secrete the hormones represented in labelled parts A and B. (1 mark)
- b) State the role of hormones secreted from part B on the uterus of human female during menstrual cycle. (2 marks)
Q2. Name of the drugs, its source and nature is given in the table below. Find a, b and c .
Name of the drug | Source plant | Nature |
|---|---|---|
a | Papaver somniferum | Depressant |
Cannabinoids | b | Effects on cardiovascular system |
Cocaine | Erythroxylum cocoa | c |
Q3. “To a user, the contraceptives must be ideal in all aspects”. Justify the statement by mentioning the qualities of an ideal contraceptive.
Q4. Name the diseases caused by the following organism.
- Rhino Virus
- Wuchereria bancrofti
- Haemophilius influenzae.
Q5. Alien species invasion caused decline or extinction of indigenous species. Justify the statement by giving three examples.
Q6. Answer the following:
- i) Differentiate between Microinjection and Biolistics. (2 marks)
- ii) Give an example for disarmed pathogen vector. (1 mark)
Karnataka 2nd PUC Biology Important Questions for 5 Marks
Q1. Schematically represent the inheritance of flower colour in snapdragon and draw conclusions.
Q2. “For hereditary diseases, gene therapy is considered as the corrective therapy”. Justify by explaining gene therapy for Adenosine deaminase (ADA) deficiency.
Q3. (i) Define immunity and name any two different types of immunity.
(ii) Draw a neat labelled diagram of structure of an antibody molecule.
Q4. Give reasons for the following:
- a) A simple cut result in non-stop bleeding in haemophilia affected individuals.
- b) Turner’s syndrome affected females are usually sterile.
- c) In Morgan’s dihybrid cross experiments on Drosophila showed that flies having genes for yellow body and white eyes exhibited less recombination.
- d) Inheritance of skin colour in the humans shows different phenotypes.
- e) Accumulation of phenylalanine in the body of phenylketonuria affected individuals.
Q5. Name the population interactions involved in the following examples:
- i) Animals eating on plants
- ii) Visiting flamingoes and resident fishes of a lake
iii) Human liverfluke and snail
- iv) Orchid growing on a mango tree
- v) Flower and its pollinating insect
Q6. Mention the population interactions exist among the following:
- a) Abingdon tortoise and goats
- b) Tiger and deer
- c) Sea-anemone and clown fish
- d) Wasp laying eggs in fig fruit
- e) Cuscuta growing on hedge plant
How many Important Questions should I prepare for the Biology exam?
Before going to appear for the Karnataka 2nd PUC Biology exam 2026, you should try to solve questions from different chapters. Solving a variety of questions from all topics will help you to write effective answers in board exams. Ensure you solve multiple questions for each of the topics. Through this, you will learn to write answers according to the marks allotted to the question. To practice questions for the Karnataka 2nd PUC Biology exam 2026, keep visiting the page. All the important questions will be shared here.
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FAQs
The Karnataka 2nd PUC Biology exam will include all types of questions. The question paper is designed for all students. You will find easy to moderate questions in the board exams. Accordingly, the marks will be allotted to the questions and you will have to answer them accordingly.
Read and understand the questions first, check the marks allotted to the question and then consider the points to be added in the answer. You will have to write answers as per the requirement of the question. Draw a diagram, if required in order to attain good marks.
By regularly solving the Karnataka 2nd PUC Biology important questions, you get an idea about the types of questions. The regular practice enables you to perform better in board exams and score high marks.
While solving the Karnataka 2nd PUC Biology important questions, you should dedicate more time to the long questions. The short questions can be solved in less time but the sections with long questions require more time.
While writing answers for the Karnataka 2nd PUC Biology exam 2026, you will be asked to draw diagrams according to marks. You can also check the question and marks allotted to it. If required, you can draw well-labelled diagrams in order to score high marks.
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