100 Biology One-liner Questions & Answers

#	Question	Answer
1	What is the basic unit of life?	Cell
2	Which organelle is called the powerhouse of the cell?	Mitochondria
3	What is the chemical formula of water?	H₂O
4	Which gas is essential for respiration?	Oxygen (O₂)
5	Which blood cells fight infections?	White Blood Cells
6	What is the largest organ in the human body?	Skin
7	Which pigment gives plants their green color?	Chlorophyll
8	What is the process by which plants make their food?	Photosynthesis
9	Which blood component helps in clotting?	Platelets
10	Which human organ filters blood?	Kidney
11	What is the smallest unit of heredity?	Gene
12	Which organ is responsible for pumping blood?	Heart
13	Which vitamin is produced when skin is exposed to sunlight?	Vitamin D
14	Which type of blood cells carry oxygen?	Red Blood Cells
15	What is the term for cell division in somatic cells?	Mitosis
16	What is the term for cell division in reproductive cells?	Meiosis
17	Which part of the brain controls balance?	Cerebellum
18	Which blood type is known as the universal donor?	O Negative
19	Which blood type is known as the universal recipient?	AB Positive
20	Which gas do plants release during photosynthesis?	Oxygen (O₂)
21	Which organ produces insulin?	Pancreas
22	Which vitamin helps in blood clotting?	Vitamin K
23	Which organ stores bile?	Gallbladder
24	Which system controls body hormones?	Endocrine System
25	Which acid is present in our stomach?	Hydrochloric Acid (HCl)
26	Which part of the cell controls its activities?	Nucleus
27	Which blood vessels carry blood away from the heart?	Arteries
28	Which blood vessels carry blood to the heart?	Veins
29	Which vitamin is essential for vision?	Vitamin A
30	Which organ helps in digestion of fats?	Liver
31	Which hormone regulates sleep?	Melatonin
32	Which organelle synthesizes proteins?	Ribosome
33	What is the powerhouse of plant cells?	Chloroplast
34	Which cell organelle stores water?	Vacuole
35	Which blood cells are responsible for immunity?	White Blood Cells
36	Which is the longest bone in human body?	Femur
37	Which organ helps in hearing?	Ear
38	Which part of the brain controls breathing?	Medulla Oblongata
39	Which vitamin is necessary for strong bones?	Vitamin D
40	Which process breaks down food into simpler substances?	Digestion
41	Which organ is involved in excretion of urine?	Kidney
42	Which pigment absorbs sunlight in plants?	Chlorophyll
43	Which is the largest artery in the human body?	Aorta
44	Which blood component carries nutrients?	Plasma
45	Which organ stores urine temporarily?	Urinary Bladder
46	Which is the functional unit of kidney?	Nephron
47	Which part of the brain controls memory?	Hippocampus
48	Which macronutrient provides energy?	Carbohydrates
49	Which vitamin prevents scurvy?	Vitamin C
50	Which organ is involved in both digestion and detoxification?	Liver
51	Which part of the cell contains DNA?	Nucleus
52	Which blood group has no A or B antigens?	O
53	Which type of joint is found in the shoulder?	Ball and Socket Joint
54	Which type of joint is found in the elbow?	Hinge Joint
55	Which organ produces bile?	Liver
56	Which organ helps in hearing and balance?	Ear
57	Which organ controls endocrine functions?	Hypothalamus
58	Which macronutrient helps in muscle building?	Protein
59	Which blood component transports oxygen?	Red Blood Cells
60	Which organ is part of both digestive and respiratory systems?	Pharynx
61	Which vitamin is essential for blood clotting?	Vitamin K
62	Which cell organelle is involved in lipid synthesis?	Smooth Endoplasmic Reticulum
63	Which organ is called the chemical factory of the body?	Liver
64	Which vitamin deficiency causes rickets?	Vitamin D
65	Which is the smallest bone in human body?	Stapes (ear bone)
66	Which part of the brain controls voluntary movements?	Cerebrum
67	Which blood vessels are thin-walled for exchange of substances?	Capillaries
68	Which macronutrient stores long-term energy?	Fats
69	Which vitamin deficiency causes beriberi?	Vitamin B1 (Thiamine)
70	Which cell organelle contains digestive enzymes?	Lysosome
71	Which gas is required for photosynthesis?	Carbon Dioxide (CO₂)
72	Which hormone regulates blood sugar?	Insulin
73	Which vitamin is essential for wound healing?	Vitamin C
74	Which blood cells lack nucleus?	Red Blood Cells
75	Which organ produces digestive enzymes for the small intestine?	Pancreas
76	Which type of reproduction involves one parent?	Asexual Reproduction
77	Which type of reproduction involves two parents?	Sexual Reproduction
78	Which vitamin deficiency causes night blindness?	Vitamin A
79	Which blood group is called universal donor?	O Negative
80	Which blood group is called universal recipient?	AB Positive
81	Which organ secretes adrenaline?	Adrenal Gland
82	Which part of the brain controls emotions?	Limbic System
83	Which organelle produces ATP?	Mitochondria
84	Which vitamin is water-soluble and helps in metabolism?	Vitamin B Complex
85	Which organ in plants transports water?	Xylem
86	Which organ in plants transports food?	Phloem
87	Which part of the plant is responsible for reproduction?	Flower
88	Which process releases energy by breaking down glucose?	Respiration
89	Which part of the brain controls heartbeat?	Medulla Oblongata
90	Which system is responsible for body defense?	Immune System
91	Which is the longest nerve in the human body?	Sciatic Nerve
92	Which vitamin deficiency causes anemia?	Vitamin B12
93	Which organ produces red blood cells?	Bone Marrow
94	Which part of the eye controls the amount of light entering?	Iris
95	Which vitamin is essential for calcium absorption?	Vitamin D
96	Which hormone controls metabolism?	Thyroxine (T4)
97	Which organelle is involved in detoxification?	Smooth Endoplasmic Reticulum
98	Which system transports oxygen and nutrients?	Circulatory System
99	Which organ controls voluntary movements?	Cerebr
100	Which part of the brain controls balance and coordination?	Cerebellum