CTET Science की तैयारी के लिए Biology के Cell Biology, Plant Biology, Human Biology, Nutrition, Diseases, Genetics, Reproduction, Microorganisms, Ecology और Animal Kingdom जैसे topics महत्वपूर्ण हैं। नीचे CTET Biology Important Questions 2026 के लिए 100 महत्वपूर्ण MCQs answers के साथ दिए गए हैं।
Cell Biology MCQs
1. What is the basic structural and functional unit of life?
A. Tissue
B. Organ
C. Cell
D. Nucleus
Answer: C. Cell
2. Which organelle is known as the powerhouse of the cell?
A. Ribosome
B. Mitochondria
C. Golgi apparatus
D. Lysosome
Answer: B. Mitochondria
3. Which organelle controls most activities of a eukaryotic cell?
A. Ribosome
B. Vacuole
C. Nucleus
D. Lysosome
Answer: C. Nucleus
4. Which organelle is responsible for protein synthesis?
A. Ribosome
B. Mitochondria
C. Chloroplast
D. Golgi apparatus
Answer: A. Ribosome
5. Which organelle is found in plant cells and performs photosynthesis?
A. Lysosome
B. Chloroplast
C. Centriole
D. Ribosome
Answer: B. Chloroplast
6. The cell wall of plants is mainly composed of:
A. Protein
B. Cellulose
C. Lipid
D. Glycogen
Answer: B. Cellulose
7. Which structure regulates movement of substances into and out of the cell?
A. Cell wall
B. Cell membrane
C. Nucleus
D. Cytoplasm
Answer: B. Cell membrane
8. Lysosomes contain:
A. Digestive enzymes
B. Chlorophyll
C. Haemoglobin
D. Hormones
Answer: A. Digestive enzymes
9. The genetic material of most organisms is:
A. Protein
B. DNA
C. Lipid
D. Starch
Answer: B. DNA
10. The basic unit of heredity is:
A. Cell
B. Gene
C. Tissue
D. Organ
Answer: B. Gene
Plant Biology MCQs
11. Photosynthesis mainly takes place in:
A. Roots
B. Leaves
C. Flowers
D. Fruits
Answer: B. Leaves
12. Which pigment is essential for photosynthesis?
A. Haemoglobin
B. Chlorophyll
C. Melanin
D. Keratin
Answer: B. Chlorophyll
13. Plants take in which gas during photosynthesis?
A. Oxygen
B. Nitrogen
C. Carbon dioxide
D. Hydrogen
Answer: C. Carbon dioxide
14. Which gas is released during photosynthesis?
A. Carbon dioxide
B. Oxygen
C. Nitrogen
D. Hydrogen
Answer: B. Oxygen
15. Water is transported from roots to other parts of a plant through:
A. Phloem
B. Xylem
C. Cortex
D. Epidermis
Answer: B. Xylem
16. Food is transported in plants through:
A. Xylem
B. Phloem
C. Root hairs
D. Stomata
Answer: B. Phloem
17. Tiny pores present mainly on leaves are called:
A. Nephrons
B. Stomata
C. Alveoli
D. Villi
Answer: B. Stomata
18. Loss of water vapour from leaves is called:
A. Respiration
B. Transpiration
C. Photosynthesis
D. Digestion
Answer: B. Transpiration
19. Root hairs mainly help plants in:
A. Photosynthesis
B. Absorption of water and minerals
C. Reproduction
D. Food storage only
Answer: B. Absorption of water and minerals
20. Which part of a flower produces pollen grains?
A. Stigma
B. Ovary
C. Anther
D. Sepal
Answer: C. Anther
Human Biology MCQs
21. What is the largest organ of the human body?
A. Liver
B. Skin
C. Heart
D. Brain
Answer: B. Skin
22. Which organ pumps blood throughout the body?
A. Lungs
B. Heart
C. Kidney
D. Liver
Answer: B. Heart
23. How many chambers are present in the human heart?
A. Two
B. Three
C. Four
D. Five
Answer: C. Four
24. The red colour of blood is mainly due to:
A. Plasma
B. Haemoglobin
C. Platelets
D. WBCs
Answer: B. Haemoglobin
25. Which blood cells transport oxygen?
A. WBCs
B. RBCs
C. Platelets
D. Plasma
Answer: B. RBCs
26. Which blood component helps in clotting?
A. RBCs
B. WBCs
C. Platelets
D. Plasma only
Answer: C. Platelets
27. Which blood cells help defend the body against infections?
A. RBCs
B. WBCs
C. Platelets
D. Plasma
Answer: B. WBCs
28. Which organs filter waste from the blood?
A. Lungs
B. Kidneys
C. Heart
D. Stomach
Answer: B. Kidneys
29. The functional unit of the kidney is:
A. Neuron
B. Nephron
C. Alveolus
D. Villus
Answer: B. Nephron
30. Which organ is primarily responsible for detoxification and bile production?
A. Kidney
B. Liver
C. Heart
D. Pancreas
Answer: B. Liver
Human Nutrition & Digestion
31. Digestion of food begins in the:
A. Stomach
B. Small intestine
C. Mouth
D. Large intestine
Answer: C. Mouth
32. Which enzyme is present in saliva?
A. Pepsin
B. Amylase
C. Trypsin
D. Lipase
Answer: B. Amylase
33. Most digestion and absorption of nutrients occurs in:
A. Stomach
B. Small intestine
C. Large intestine
D. Oesophagus
Answer: B. Small intestine
34. Hydrochloric acid is present in the:
A. Mouth
B. Stomach
C. Small intestine
D. Liver
Answer: B. Stomach
35. Bile is produced by the:
A. Pancreas
B. Liver
C. Stomach
D. Small intestine
Answer: B. Liver
36. Bile helps mainly in the digestion of:
A. Proteins
B. Fats
C. Carbohydrates
D. Vitamins
Answer: B. Fats
37. Which nutrient is primarily responsible for body growth and repair?
A. Protein
B. Carbohydrate
C. Water
D. Mineral salts
Answer: A. Protein
38. Which nutrient is the body's major immediate source of energy?
A. Protein
B. Carbohydrate
C. Vitamin
D. Mineral
Answer: B. Carbohydrate
39. Deficiency of Vitamin C causes:
A. Rickets
B. Scurvy
C. Beriberi
D. Night blindness
Answer: B. Scurvy
40. Deficiency of Vitamin D causes:
A. Scurvy
B. Rickets
C. Beriberi
D. Goitre
Answer: B. Rickets
Respiration & Circulation
41. Exchange of gases in human lungs takes place mainly in:
A. Trachea
B. Alveoli
C. Bronchi
D. Nose
Answer: B. Alveoli
42. Which gas is required for aerobic respiration?
A. Carbon dioxide
B. Oxygen
C. Nitrogen
D. Hydrogen
Answer: B. Oxygen
43. Which gas is produced as a major waste product of aerobic respiration?
A. Oxygen
B. Carbon dioxide
C. Nitrogen
D. Hydrogen
Answer: B. Carbon dioxide
44. The human respiratory system includes:
A. Lungs and air passages
B. Kidneys only
C. Heart and blood vessels only
D. Stomach and intestine
Answer: A. Lungs and air passages
45. Which blood vessel carries blood away from the heart?
A. Vein
B. Artery
C. Capillary
D. Venule
Answer: B. Artery
46. Which blood vessel generally carries blood toward the heart?
A. Artery
B. Vein
C. Aorta
D. Arteriole
Answer: B. Vein
47. The largest artery in the human body is:
A. Pulmonary artery
B. Aorta
C. Vena cava
D. Coronary artery
Answer: B. Aorta
48. Which chamber of the heart pumps oxygenated blood to most of the body?
A. Right atrium
B. Right ventricle
C. Left atrium
D. Left ventricle
Answer: D. Left ventricle
49. Normal human blood circulation is described as:
A. Open circulation
B. Double circulation
C. Single circulation
D. No circulation
Answer: B. Double circulation
50. The pulse is associated with:
A. Expansion of arteries due to heartbeats
B. Movement of air in lungs
C. Contraction of stomach
D. Movement of bones
Answer: A. Expansion of arteries due to heartbeats
Nervous & Endocrine System
51. The basic structural and functional unit of the nervous system is:
A. Nephron
B. Neuron
C. Alveolus
D. Axon only
Answer: B. Neuron
52. Which organ controls most activities of the human body?
A. Heart
B. Brain
C. Liver
D. Kidney
Answer: B. Brain
53. Which part of the brain is mainly responsible for thinking, memory and voluntary actions?
A. Cerebrum
B. Cerebellum
C. Medulla
D. Spinal cord
Answer: A. Cerebrum
54. Which part of the brain helps maintain balance and coordination?
A. Cerebrum
B. Cerebellum
C. Medulla
D. Hypothalamus
Answer: B. Cerebellum
55. Insulin is secreted by the:
A. Thyroid gland
B. Pancreas
C. Pituitary gland
D. Adrenal gland
Answer: B. Pancreas
56. Insulin helps regulate:
A. Body temperature
B. Blood glucose level
C. Blood clotting
D. Breathing rate only
Answer: B. Blood glucose level
57. Thyroxine is produced by the:
A. Thyroid gland
B. Pancreas
C. Adrenal gland
D. Pituitary gland
Answer: A. Thyroid gland
58. Which gland is often called the master gland?
A. Thyroid
B. Pituitary
C. Adrenal
D. Pancreas
Answer: B. Pituitary
59. Adrenaline is secreted by the:
A. Adrenal glands
B. Thyroid gland
C. Pancreas
D. Pituitary gland
Answer: A. Adrenal glands
60. Iodine is required for the production of:
A. Insulin
B. Thyroxine
C. Adrenaline
D. Haemoglobin
Answer: B. Thyroxine
Genetics & Reproduction
61. Who is known as the father of genetics?
A. Charles Darwin
B. Gregor Mendel
C. Robert Hooke
D. Louis Pasteur
Answer: B. Gregor Mendel
62. How many chromosomes are normally present in a human somatic cell?
A. 23
B. 44
C. 46
D. 48
Answer: C. 46
63. How many chromosomes are present in a normal human gamete?
A. 23
B. 44
C. 46
D. 48
Answer: A. 23
64. The male gamete in humans is:
A. Ovum
B. Sperm
C. Zygote
D. Embryo
Answer: B. Sperm
65. The female gamete in humans is:
A. Sperm
B. Ovum
C. Zygote
D. Embryo
Answer: B. Ovum
66. Fusion of male and female gametes is called:
A. Pollination
B. Fertilization
C. Germination
D. Budding
Answer: B. Fertilization
67. The cell formed immediately after fertilization is called:
A. Embryo
B. Zygote
C. Foetus
D. Gamete
Answer: B. Zygote
68. Which molecule carries genetic information in most organisms?
A. DNA
B. ATP
C. Glucose
D. Lipid
Answer: A. DNA
69. DNA generally has the shape of a:
A. Single helix
B. Double helix
C. Triple helix
D. Straight chain
Answer: B. Double helix
70. Genes are located on:
A. Ribosomes
B. Chromosomes
C. Cell membrane
D. Cytoplasm only
Answer: B. Chromosomes
Diseases & Microorganisms
71. Malaria is caused by:
A. Virus
B. Plasmodium
C. Bacterium
D. Fungus
Answer: B. Plasmodium
72. Malaria is transmitted mainly by:
A. Male Anopheles mosquito
B. Female Anopheles mosquito
C. Aedes mosquito
D. Housefly
Answer: B. Female Anopheles mosquito
73. Dengue is caused by a:
A. Bacterium
B. Virus
C. Fungus
D. Protozoan
Answer: B. Virus
74. Dengue is mainly transmitted by:
A. Aedes mosquito
B. Anopheles mosquito
C. Housefly
D. Tick
Answer: A. Aedes mosquito
75. Tuberculosis is primarily caused by:
A. Virus
B. Bacterium
C. Protozoan
D. Fungus
Answer: B. Bacterium
76. AIDS is caused by:
A. HIV
B. HBV
C. HPV
D. HCV
Answer: A. HIV
77. Rabies is caused by:
A. Virus
B. Bacterium
C. Fungus
D. Protozoan
Answer: A. Virus
78. Antibiotics are primarily used against:
A. Bacterial infections
B. All viral infections
C. Genetic disorders
D. Vitamin deficiencies
Answer: A. Bacterial infections
79. Which microorganism is commonly used in bread making?
A. Yeast
B. Virus
C. Algae
D. Protozoan
Answer: A. Yeast
80. Which microorganism is used in curd formation?
A. Lactobacillus
B. Plasmodium
C. Amoeba
D. Yeast only
Answer: A. Lactobacillus
???? Zoology & Animal Kingdom
81. Fish generally breathe through:
A. Lungs
B. Gills
C. Skin only
D. Trachea
Answer: B. Gills
82. Which of the following is an amphibian?
A. Frog
B. Snake
C. Pigeon
D. Cow
Answer: A. Frog
83. Which of the following is a reptile?
A. Frog
B. Snake
C. Whale
D. Sparrow
Answer: B. Snake
84. Which of the following is a mammal?
A. Crocodile
B. Whale
C. Frog
D. Fish
Answer: B. Whale
85. Which animal group has feathers?
A. Mammals
B. Birds
C. Reptiles
D. Amphibians
Answer: B. Birds
86. Which animal is an invertebrate?
A. Cow
B. Frog
C. Earthworm
D. Fish
Answer: C. Earthworm
87. Earthworm belongs to the phylum:
A. Arthropoda
B. Annelida
C. Mollusca
D. Chordata
Answer: B. Annelida
88. Cockroach belongs to:
A. Arthropoda
B. Mollusca
C. Annelida
D. Echinodermata
Answer: A. Arthropoda
89. Octopus belongs to:
A. Mollusca
B. Arthropoda
C. Annelida
D. Chordata
Answer: A. Mollusca
90. Starfish belongs to:
A. Annelida
B. Echinodermata
C. Mollusca
D. Arthropoda
Answer: B. Echinodermata
???? Ecology & Environment
91. Green plants are generally:
A. Consumers
B. Producers
C. Decomposers
D. Parasites
Answer: B. Producers
92. Organisms that break down dead organic matter are:
A. Producers
B. Decomposers
C. Herbivores
D. Carnivores
Answer: B. Decomposers
93. Which of the following is a primary consumer?
A. Grass
B. Deer
C. Tiger
D. Fungi
Answer: B. Deer
94. A food chain generally begins with:
A. Carnivores
B. Producers
C. Decomposers
D. Omnivores
Answer: B. Producers
95. Which gas is a major greenhouse gas?
A. Oxygen
B. Carbon dioxide
C. Hydrogen
D. Helium
Answer: B. Carbon dioxide
96. The ozone layer protects Earth mainly from:
A. Infrared radiation
B. Ultraviolet radiation
C. Radio waves
D. Sound waves
Answer: B. Ultraviolet radiation
97. Which of the following is a renewable source of energy?
A. Coal
B. Petroleum
C. Solar energy
D. Natural gas
Answer: C. Solar energy
98. Biodiversity refers to:
A. Variety of living organisms
B. Only plant species
C. Only animal species
D. Only microorganisms
Answer: A. Variety of living organisms
99. Which practice helps conserve biodiversity?
A. Deforestation
B. Habitat destruction
C. Protected areas
D. Excessive hunting
Answer: C. Protected areas
100. The transfer of energy through an ecosystem mainly occurs through:
A. Food chains and food webs
B. Rocks
C. Clouds
D. Soil only
Answer: A. Food chains and food webs
???? CTET Biology 2026 Quick Revision
For the CTET Science Biology section, focus especially on:
- Cell and Cell Organelles
- Plant Nutrition & Photosynthesis
- Human Digestive System
- Respiratory System
- Blood & Circulatory System
- Excretory System
- Nervous System
- Endocrine System
- Human Reproduction
- Genetics & Heredity
- Vitamins & Minerals
- Diseases & Microorganisms
- Animal Kingdom
- Food Chain & Ecosystem
- Biodiversity & Environment
Preparation Tip: इन 100 MCQs को केवल याद करने के बजाय प्रत्येक प्रश्न के पीछे का concept समझें। CTET में Science questions में conceptual understanding और everyday-life application पर ध्यान देना उपयोगी रहता है।
