Kerala SSLC Biology Exam 2025: The Kerala SSLC Class 10 Biology exam for the 2025 academic year has now concluded. Students across the country have completed an important exam of their board exam journey. The exam was conducted in a single shift from 9:30 am to 11:15 pm. Now that the exam is over, students are eagerly waiting for a detailed exam analysis, student feedback, expert reviews, and the answer key.
In this article, we bring you the latest updates, including a comprehensive exam analysis, student and teacher reactions, and access to the Kerala SSLC Biology Question Paper 2025 along with the answer key to help students evaluate their performance.
According to initial feedback, the exam's difficulty level was moderate, with a balanced mix of theoretical and diagram based questions. Some students found the diagram based problems challenging but manageable with proper preparation.
Kerala SSLC Biology Exam Analysis and Feedback
- Now that the Kerala SSLC Biology Exam 2025 is over, subject experts and educators are reviewing the question paper. The exam was structured effectively to assess both conceptual understanding and problem-solving skills.
- Students were tested on various topics of Biology.
Student and Teacher Reactions
- Students: Many students expressed were satisfied after the exam. While some found the diagram based a bit tricky, others mentioned that the MCQs and theory-based questions were from the syllabus. Time management was an important factor, and students who practised previous years' papers found the paper easy to attempt.
- Teachers: Educators noted that the exam was well-balanced across all sections, with a good mix of theory and diagram based questions. The assertion-reasoning questions required deep conceptual understanding, making the exam slightly challenging for students who focused only on memorisation. However, all questions were syllabus-based.
- Overall, the feedback suggests that students with a strong conceptual understanding and good problem-solving skills could perform well in the exam.
Kerala SSLC Biology Question Paper 2025 and Answer Keys
Soon after the exam, the detailed sets of today’s Kerala SSLC Biology Question Paper 2025, along with expert-curated answer keys will be shared. Students eagerly await these resources to review and understand the exam better. The answers are now available and students can click on the direct link below to get the question paper and answer key.
Kerala SSLC Biology Question Paper 2025: Download PDF
Kerala SSLC Biology Answer Key 2025
1.Which is the main endocrine gland that controls metabolic activities?
(a) Pancreas
(b) Thyroid gland
(c) Pineal gland
(d) Adrenal gland
2.Which of the following nucleotides is found only in RNA?
(a) A
(b) G
(c) U (Uracil)
(d) T
3."New species are formed by the inheritance of sudden changes that occur in genes." Which scientist proposed this explanation?
(a) Charles Darwin
(b) Lamarck
(c) A.I. Oparin
(d) Hugo de Vries
4.Which of the following activities is correct while viewing nearby objects?
(i) The ciliary muscles contract.
(ii) The curvature of the lens decreases.
(iii) The ligaments stretch.
(iv) The focal length decreases.
(a) (i) and (ii) are correct
(b) (i), (ii), and (iii) are correct
(c) (i) and (iv) are correct
(d) (ii), (iii), and (iv) are correct
5.Correct the mistakes, if any, in the underlined part of the given statements.
(a) BCG vaccine is used to prevent Tuberculosis.
(b) AB positive is the blood group that has the D antigen in addition to A and B antigens.
(c) Fibrin is the enzyme that converts prothrombin to thrombin in the process of blood clotting.
Answer: Option (c) is incorrect.
Correct answer is - Thrombin is the enzyme that converts fibrinogen to fibrin in blood clotting.
6.Some diseases and proteins produced through genetic engineering for their treatment are given. Choose the correct pair.
(a) Insulin - Growth disorders
(b) Interferons - Viral diseases
(c) Endorphins - Diabetes
(d) Somatotropin - Pain
7.Analyse the given statements ‘A’ and ‘B’ and answer the following questions.
A: The defects in genes may cause deformities in the sequencing of amino acids, which are the building blocks of hemoglobin.
B: The genes that control the synthesis of proteins for blood clotting become defective.
(a) Identify the diseases indicated by ‘A’ and ‘B’.
Answer:
- A → Sickle Cell Anemia
- B → Hemophilia
(b) How is a temporary relief brought about for the disease indicated by ‘B’?
Answer: Temporary relief for Hemophilia is given through blood transfusion or administering clotting factor injections.
8.Observe the given illustration and answer the questions.
(a) What similarity do these organs have in their internal structure?
Answer: These organs have a similar bone structure (humerus, radius, ulna, carpals, metacarpals, and phalanges) but are modified for different functions.
(b) How does the comparative study of these organs provide evidence for evolution?
Answer: These organs are homologous structures, which means they have a common evolutionary ancestor but have adapted for different functions (walking, flying, swimming). This supports the theory of evolution by natural selection.
9.Observe the cross-section of a nerve and answer the questions.
(a) What is the function of the part indicated by ‘X’?
Answer: The part ‘X’ represents the myelin sheath, which insulates the nerve fiber and increases the speed of nerve impulse transmission.
(b) How do sensory nerves and motor nerves differ in function?
Answer: Sensory nerves carry signals from sensory organs to the brain/spinal cord.
Motor nerves carry signals from the brain/spinal cord to muscles or glands, enabling movement.
- Analyse the newspaper report given below and answer the questions.
The spread of HIV increases through drug injection. Most of the infected people are adolescents...!
(a) How does drug injection lead to the spread of HIV?
Answer: HIV spreads through drug injection when people share contaminated needles. If an infected person uses a needle and it is later used by another individual without sterilization, the virus can be transmitted through blood contact.
(b) How does the condition of AIDS become fatal?
Answer: AIDS weakens the immune system by destroying white blood cells (T cells), making the body vulnerable to infections and diseases. Without a strong immune response, even minor infections can become life-threatening, leading to fatal complications.
- Explain the role of each of the following activities in the defense mechanism.
(a) Lysosomes combine with membrane sac during the process of phagocytosis.
Answer: Lysosomes contain digestive enzymes that help break down harmful bacteria, viruses, and dead cell material. During phagocytosis, they fuse with membrane sacs containing pathogens and digest them, preventing infections.
(b) Chemicals produced by white blood cells increase body temperature.
Answer: White blood cells release chemicals like pyrogens, which increase body temperature. This fever response helps slow down the growth of pathogens and enhances the body's immune
- Analyse each of the given situations and explain how variations are formed in the offspring.
(a) During the initial phase of meiosis, chromosomes pair.
Answer: During meiosis, homologous chromosomes pair up and exchange genetic material through a process called crossing over. This recombination creates genetic diversity, leading to variations in offspring.
(b) Parents’ chromosomes reach their offspring through gametes.
Answer: Each parent contributes half of their chromosomes to the offspring through sperm and egg cells (gametes). Since genetic material is randomly shuffled during meiosis, the offspring inherit a unique combination of traits, leading to variations.
- The main parts and functions of the brain are given in the box. Arrange them in the following table suitably.
Given information:
- Thalamus: Controls voluntary movements
- Cerebellum: Acts as a relay station of impulses
- Hypothalamus: Maintains equilibrium of the body
- Cerebrum: Maintains homeostasis
Answer:
| Part | Function |
| Thalamus | Acts as a relay station of impulses |
| Cerebellum | Controls voluntary movements |
| Hypothalamus | Maintains equilibrium of the body |
| Cerebrum | Maintains homeostasis |
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