Hello students! Welcome to this blog post, where we bring you a collection of CBSE Class 10 Biology MCQ questions from previous year papers. These questions have been carefully extracted to help you understand the exam pattern and strengthen your preparation. Whether you're looking to revise key concepts or practice for your upcoming exams, this post has got you covered. Stay tuned for valuable insights and tips to excel in your Biology exam! Let's get started!
1. Which one of the following statements is NOT true?
2. In a nerve cell, the site where the electrical impulse is converted into a chemical signal is known as:
3. Chromosomes:
(i) carry hereditary information from parents to the next generation.
(ii) are thread like structures located inside the nucleus of an animal cell.
(iii) always exist in pairs in human reproductive cells.
(iv) are involved in the process of cell division.
The correct statements are:
4. A stomata closes when:
(i) it needs carbon dioxide for photosynthesis.
(ii) it does not need carbon dioxide for photosynthesis.
(iii) water flows out of the guard cells.
(iv) water flows into the guard cells.
The correct reason(s) in this process is/are:
5. In which of the following organisms, multiple fission is a means of asexual reproduction?
6. Identify the food chain in which the organisms of the second trophic level are missing:
7. In human respiratory system, when a person breathes in, the position of ribs and diaphragm will be:
8. Select out of the following a gland which does NOT occur as a pair in the human body:
9. Which of the following statement(s) is (are) true about human heart?
(a) Right atrium receives oxygenated blood from lungs through pulmonary artery.
(b) Left atrium transfers oxygenated blood to left ventricle which sends it to various parts of the body.
(c) Right atrium receives deoxygenated blood through vena cava from upper and lower body.
(d) Left atrium transfers oxygenated blood to aorta which sends it to different parts of the body.
10. Which one of the following organism is represented by this diagram?
11. A cross made between two pea plants produces 50% tall and 50% short pea plants. The gene combination of the parental pea plants must be:
12. Which one of the following statements is TRUE for Hydra, Amoeba, and Spirogyra?
13. A cross between two tall pea plants resulted in offspring having a few dwarf plants. The gene-combination of the parental plants must be:
14. United Nations Environment Programme forged an agreement to:
15. Consider the following statements about ozone:
(a) Ozone is a poisonous gas.
(b) Ozone shields the earth's surface from the infrared radiation from the sun.
(c) Ozone is a product of UV radiations acting on oxygen molecule.
(d) At the lower level of the earth's atmosphere, ozone performs most essential function.
The correct statements are:
16. A zygote is formed by the fusion of a male gamete and a female gamete. The number of chromosomes in the zygote of a human is:
17. The process in which transport of soluble products of photosynthesis takes place in plants is known as:
18. Sense organ in which olfactory receptors are present is:
19. The incorrect statement about placenta is:
20. The part of seed which is a source of food during germination of seed is:
21. The plants that can be raised by the method of vegetative propagation are:
22. A plant growth inhibitor hormone which causes wilting of leaves is called:
23. In human beings, when the process of digestion is completed, the (i) proteins, (ii) carbohydrates, and (iii) fats are respectively finally converted into:
24. Some wastes are given below:
(i) Garden waste
(ii) Ball point pen refills
(iii) Empty medicine bottles made of glass
(iv) Peels of fruits and vegetables
(v) Old cotton shirt
The non-biodegradable wastes among these are:
25. Which one of the following is not a natural ecosystem?
26. Select from the following the conditions responsible for the rapid spread of bread mould on a slice of bread:
(i) Formation of large number of spores
(ii) Presence of moisture and nutrients in bread
(iii) Low temperature
(iv) Presence of hyphae