MCQOPTIONS
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MCQOPTIONS
This section includes 1075 Mcqs, each offering curated multiple-choice questions to sharpen your Biology knowledge and support exam preparation. Choose a topic below to get started.
| 251. |
The release of which of the following into ponds and wells helps in controlling mosquitoes? |
| A. | Snail |
| B. | Crab |
| C. | Dogfish |
| D. | Gambusia fish |
| Answer» E. | |
| 252. |
2, 4-D is used as |
| A. | Weedicide |
| B. | Vitamin |
| C. | Fertilizer |
| D. | Insecticide |
| Answer» B. Vitamin | |
| 253. |
Green blocks are referred to |
| A. | Green cover |
| B. | Green Ministry |
| C. | Bio-bricks |
| D. | Pro-biotic curd |
| Answer» D. Pro-biotic curd | |
| 254. |
The ambient air is stable when the ambient lapse rate is |
| A. | Neutrally stable |
| B. | Hyper-adiabatic |
| C. | Sub-adiabatic |
| D. | Super-adiabatic |
| Answer» D. Super-adiabatic | |
| 255. |
In the grass lands, trees do not replace the grasses as a part of an ecological succession because of |
| A. | Limited sun light and paucity of nutrients |
| B. | None of the options |
| C. | Insect and fungi |
| D. | Water limits and fire |
| Answer» E. | |
| 256. |
Which one of the following is the respiratory pigment in man ? |
| A. | Haemocyanin |
| B. | Haemoerythrin |
| C. | b-Carotene |
| D. | Haemoglobin |
| Answer» E. | |
| 257. |
Molybdenum deficiency affects the activity of : |
| A. | All of the given options |
| B. | Chlorate reductase |
| C. | Nitrogenase |
| D. | Nitrate reductase |
| Answer» E. | |
| 258. |
Membrane lipids of chill-sensitive plants contain |
| A. | low proportion of saturated fatty acids. |
| B. | low proportion of unsaturated fatty acids. |
| C. | |
| D. | equal proportion of saturated and unsaturated fatty acids. |
| E. | high proportion of unsaturated fatty acids. |
| Answer» E. high proportion of unsaturated fatty acids. | |
| 259. |
Wings of a bird and an insect are |
| A. | Homologous organs |
| B. | Analogous organs |
| C. | Vestigial organs |
| D. | Rudimentary organs |
| Answer» C. Vestigial organs | |
| 260. |
Major pesticidal properties are present in |
| A. | Jatropha |
| B. | Castor |
| C. | Pongamia |
| D. | Jamun |
| E. | None of these |
| Answer» F. | |
| 261. |
When one gene pair hides the effect of the other unit, the phenomenon is referred to as: |
| A. | Epistasis |
| B. | Mutation |
| C. | None of the options |
| D. | Dominance |
| Answer» B. Mutation | |
| 262. |
The Biosphere is the zone of Earth where life is found. It includes parts of : |
| A. | a and c |
| B. | a, b and d |
| C. | a and d |
| D. | b, c and d |
| Answer» C. a and d | |
| 263. |
Mission Indradhanush Campaign in India is associated with : |
| A. | Nutrition to Pregnant Women |
| B. | Awareness of Diabetes |
| C. | Eradication of blindness |
| D. | Vaccination of children |
| Answer» E. | |
| 264. |
Which among the following is thesweetest sugar? |
| A. | lacrose |
| B. | fructose |
| C. | maltos |
| D. | glucose |
| Answer» C. maltos | |
| 265. |
The structure which helps in the nutrition of the Embryo is |
| A. | Yolk sac |
| B. | |
| C. | Amniotic membrane |
| D. | Crypts |
| E. | Placenta |
| Answer» B. | |
| 266. |
The sweet taste of fruits is due to |
| A. | Lactose |
| B. | Fructose |
| C. | Maltose |
| D. | Ribose |
| Answer» C. Maltose | |
| 267. |
Number of teeth which are replaced in man are |
| A. | 12 |
| B. | 20 |
| C. | 32 |
| D. | 16 |
| Answer» C. 32 | |
| 268. |
Bile is secreted by : |
| A. | Gall bladder |
| B. | Liver |
| C. | Bile duct |
| D. | Pancreas |
| Answer» C. Bile duct | |
| 269. |
The total number of bones in the human body is : |
| A. | 206 |
| B. | 260 |
| C. | 306 |
| D. | 360 |
| Answer» B. 260 | |
| 270. |
Meningitis is a disease which affects the |
| A. | Kidneys |
| B. | Liver |
| C. | Heart |
| D. | Brain |
| Answer» E. | |
| 271. |
What causes common cold ? |
| A. | Bacteria |
| B. | Fungi |
| C. | Virus |
| D. | Protozoa |
| Answer» D. Protozoa | |
| 272. |
The radioactive Strontium-90 causes : |
| A. | Brain cancer |
| B. | Skin cancer |
| C. | Lung cancer |
| D. | Bone cancer |
| Answer» C. Lung cancer | |
| 273. |
The largest organ of human body is : |
| A. | Heart |
| B. | Brain |
| C. | Liver |
| D. | Kidney |
| Answer» D. Kidney | |
| 274. |
An eazyme produced by HIV that allows the integration of HIV DNA into the host cell s DNA is : |
| A. | Ligase |
| B. | Integrase |
| C. | Helicase |
| D. | DNA gyrase |
| Answer» C. Helicase | |
| 275. |
The term Green Revolution was coined by |
| A. | William Gaud |
| B. | Charles Elton |
| C. | Eugene Odum |
| D. | M.S. Swaminathan |
| Answer» B. Charles Elton | |
| 276. |
Which one of the following parts of the human brain is the regulating centre for swallowing and vomiting? |
| A. | Cerebellum |
| B. | Cerebrum |
| C. | Medulla Oblongata |
| D. | Pons |
| Answer» D. Pons | |
| 277. |
Intercalary meristems are found in |
| A. | Node |
| B. | Lateral bud |
| C. | Terminal bud |
| D. | Inter node |
| Answer» E. | |
| 278. |
Which one of the following is the smallest endocrine gland in human body ? |
| A. | Adrenal |
| B. | Thyroid |
| C. | Pituitary |
| D. | Pancreas |
| Answer» D. Pancreas | |
| 279. |
Blubber is |
| A. | a milky secretion of rubber plant |
| B. | a layer of thick fat |
| C. | a device to trap insects by some aquatic |
| D. | fungal infection of rice plants |
| Answer» C. a device to trap insects by some aquatic | |
| 280. |
The example of hermaphrodite animal in which cross fertilisation occurs is |
| A. | Hydra |
| B. | Ascaris |
| C. | Earthworm |
| D. | Silkworm |
| Answer» B. Ascaris | |
| 281. |
Cadmium pollution is associated with : |
| A. | Minamata disease |
| B. | Black foot disease |
| C. | Dyslexia |
| D. | Itai-itai |
| Answer» E. | |
| 282. |
Vector of Kala-azar is : |
| A. | Anopheles mosquito |
| B. | Culex mosquito |
| C. | Tse-Tsefly |
| D. | Sand fly |
| Answer» E. | |
| 283. |
Yellow spots on citrus leaves is due to the deficiency of: |
| A. | Zinc |
| B. | Magnesium |
| C. | Boron |
| D. | Iron |
| Answer» C. Boron | |
| 284. |
The colour change in the Chameleon is due to the presence of |
| A. | Haemoglobin |
| B. | Chromatophore |
| C. | Chlorophyll |
| D. | Pneumatophore |
| Answer» C. Chlorophyll | |
| 285. |
Which of the following is an egg laying mammal ? |
| A. | Bat |
| B. | Leafy ant-eater |
| C. | Whale |
| D. | Spiny ant-eater |
| Answer» E. | |
| 286. |
Silk is produced by |
| A. | Egg of a silkworm |
| B. | Pupa of silkworm |
| C. | Larva of silkworm |
| D. | Insect itself |
| Answer» D. Insect itself | |
| 287. |
The coding segment of DNA is called in |
| A. | Codon |
| B. | Muton |
| C. | Intron |
| D. | Exon |
| Answer» B. Muton | |
| 288. |
The saliva helps in the digestion of |
| A. | Proteins |
| B. | Starch |
| C. | Fibres |
| D. | Fats |
| Answer» C. Fibres | |
| 289. |
The deficiency of iodine leads to |
| A. | Hyperthyroidism |
| B. | Goitre |
| C. | Midgut |
| D. | Diabetes |
| Answer» C. Midgut | |
| 290. |
Which chromosomal combination is responsible for maleness in man ? |
| A. | XO |
| B. | XXX |
| C. | XX |
| D. | XY |
| Answer» E. | |
| 291. |
In cauliflower plant the useful part is : |
| A. | Underground stem |
| B. | Root |
| C. | Young inflorescence |
| D. | Leaves |
| Answer» D. Leaves | |
| 292. |
The cuticle is absent in |
| A. | Leaf |
| B. | Stem |
| C. | Root |
| D. | Fruit |
| Answer» D. Fruit | |
| 293. |
Which one of the following animals is devoid of lateral line sense organ? |
| A. | Labeo |
| B. | Catla |
| C. | Sea horse |
| D. | Magur |
| Answer» D. Magur | |
| 294. |
Which of the following is not an insectivorous plant ? |
| A. | Nepenthes |
| B. | Utricularia |
| C. | Drosera |
| D. | Cuscuta |
| Answer» E. | |
| 295. |
Which one of the following is also called as milk sugar ? |
| A. | Glucose |
| B. | Fructose |
| C. | Maltose |
| D. | Lactose |
| Answer» E. | |
| 296. |
Which of the following insect has its scientific name as Blattaria ? |
| A. | Beetle |
| B. | Cockroach |
| C. | Mosquito |
| D. | Butterfly |
| Answer» C. Mosquito | |
| 297. |
Which of the following can be used for biological control of mosquitoes ? |
| A. | DDT |
| B. | Gambusia |
| C. | Oil |
| D. | Ointments |
| Answer» C. Oil | |
| 298. |
Statement I |
| A. | Statement I is correct, but Statement II is incorrect. |
| B. | Statement I is incorrect, but Statement II is correct. |
| C. | Both statements I and II are correct. |
| D. | Both statements I and II are incorrect. |
| Answer» B. Statement I is incorrect, but Statement II is correct. | |
| 299. |
Which organ is the alternate term for womb? |
| A. | Uterus |
| B. | Ureter |
| C. | Vagina |
| D. | Vulva |
| Answer» B. Ureter | |
| 300. |
The life span of RBC of man is |
| A. | 120 days |
| B. | 150 days |
| C. | 180 days |
| D. | 190 days |
| Answer» C. 180 days | |