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MCQOPTIONS
This section includes 5751 Mcqs, each offering curated multiple-choice questions to sharpen your Biology knowledge and support exam preparation. Choose a topic below to get started.
| 201. |
The flavour of apples is mainly due to which one of the following? |
| A. | Formalin |
| B. | Benzene |
| C. | Ethanal |
| D. | Benzaldehye |
| Answer» D. Benzaldehye | |
| 202. |
What is the mode of nutrition of mushroom? |
| A. | Photosynthetic |
| B. | Chemosynthetic |
| C. | Parasitic |
| D. | Saprophytic |
| Answer» E. | |
| 203. |
Reproduction in most of the bacteria is by a process known as |
| A. | Sexual |
| B. | Budding |
| C. | Sporulation |
| D. | Binary fission |
| Answer» E. | |
| 204. |
The "scientific method" involves all of the following except |
| A. | A rigid set of logical steps |
| B. | A suspicion of what the truth might be |
| C. | Imagination and insight |
| D. | An educated guess |
| Answer» B. A suspicion of what the truth might be | |
| 205. |
Which of the following is not part of the scientific process? |
| A. | Making predictions |
| B. | Proving theories are true |
| C. | Using creative insight |
| D. | Asking questions |
| Answer» C. Using creative insight | |
| 206. |
In AIDS, HIV kills |
| A. | Antibody molecule |
| B. | Bone-marrow cells |
| C. | T-cytotoxic cell |
| D. | T-helper cell |
| Answer» E. | |
| 207. |
In the study of science |
| A. | Deductive reasoning may be used, but inductive reasoning is preferred |
| B. | Inductive reasoning may be used, but deductive reasoning is preferred |
| C. | Either deductive reasoning, inductive reasoning, or both may be used |
| D. | Only inductive reasoning is used |
| Answer» D. Only inductive reasoning is used | |
| 208. |
Fertilization is process in which- |
| A. | A male gamete fuse with egg cell |
| B. | Transfer of pollen grains nuclei |
| C. | Fusion of male gamete with polar |
| D. | Formation of seed from ovule |
| Answer» B. Transfer of pollen grains nuclei | |
| 209. |
All of the evidence gathered by Darwin to support his theory of evolution by natural selection |
| A. | Was gathered from observations made by darwin and from information presented by others |
| B. | Was gathered based solely on observations made during his trip to the galapagos islands |
| C. | Was presented in his book essay on the principle of population |
| D. | Included an explanation of how traits can be passed from generation to generation |
| Answer» B. Was gathered based solely on observations made during his trip to the galapagos islands | |
| 210. |
Which of the following represent maximum number of species among global biodiversity? |
| A. | Lichens |
| B. | Algae |
| C. | Fungi |
| D. | Mosses and ferns |
| Answer» D. Mosses and ferns | |
| 211. |
A successful scientific experiment will result only in |
| A. | Confirming predictions |
| B. | Accepting many hypotheses |
| C. | Rejection of one or more hypotheses |
| D. | Proving a hypothesis |
| Answer» D. Proving a hypothesis | |
| 212. |
Which of the following diseases is due to an allergic reaction? |
| A. | Hay fever |
| B. | Enteric fever |
| C. | Goitre |
| D. | Skin cancer |
| Answer» B. Enteric fever | |
| 213. |
Human insulin is being commercially produced from a transgenic species of |
| A. | Mycobacterium |
| B. | Rhizobium |
| C. | Escherichia |
| D. | Saccharomyces |
| Answer» D. Saccharomyces | |
| 214. |
Carbon dioxide is called green-house gas because it is |
| A. | Used in green-house to increase plant growth |
| B. | Transparent to both sunlight and heat |
| C. | Transparent to sunlight but traps heat |
| D. | Used in green-house to increase plant growth |
| Answer» D. Used in green-house to increase plant growth | |
| 215. |
Which of the following part modified into pitcher in pitcher plant- |
| A. | Stem |
| B. | Leaf |
| C. | Petiole |
| D. | Stipule |
| Answer» C. Petiole | |
| 216. |
Lungs of a plant are- |
| A. | Leaves |
| B. | Stems |
| C. | Flowers |
| D. | Roots |
| Answer» B. Stems | |
| 217. |
Which part of pear is edible- |
| A. | Fleshy thalmus |
| B. | Spores |
| C. | Pod |
| D. | Both (a) and (b) |
| Answer» B. Spores | |
| 218. |
Crop shown at the commencement of the monsoon is called - |
| A. | Rabi crop |
| B. | Cash crop |
| C. | Kharif crop |
| D. | None of these |
| Answer» D. None of these | |
| 219. |
From which part of Opium plant we get morphine? |
| A. | Leaves |
| B. | Stem |
| C. | Bank |
| D. | Fruit coat |
| Answer» E. | |
| 220. |
The plant from which cocoa and chocolate are obtained is a- |
| A. | Herb |
| B. | Shrub |
| C. | Small trees |
| D. | Very big tree |
| Answer» C. Small trees | |
| 221. |
Lenticels are involved in |
| A. | Food transport |
| B. | Gaseous exchange |
| C. | Photosynthesis |
| D. | Transpiration |
| Answer» C. Photosynthesis | |
| 222. |
Age of a tree can be estimated by |
| A. | Biomass |
| B. | Its height and girth |
| C. | Diameter of its heartwood |
| D. | Number of annual rings |
| Answer» E. | |
| 223. |
The term "antibiotic" was coined by: |
| A. | Edward jenner |
| B. | Selman waksman |
| C. | Alexander fleming |
| D. | Louis pasteu |
| Answer» C. Alexander fleming | |
| 224. |
Darwin spent 5 years sailing around the world on the |
| A. | H.m.s. beagle |
| B. | H.m.s. evolution |
| C. | H.m.s. tortoise |
| D. | H.m.s. species |
| Answer» B. H.m.s. evolution | |
| 225. |
Variation in gene frequencies within populations can occur by chance rather than by natural selection. This is referred to as |
| A. | Genetic drift |
| B. | Genetic load |
| C. | Genetic flow |
| D. | Random mating |
| Answer» B. Genetic load | |
| 226. |
Seed coat is not thin, membranous in |
| A. | Gram |
| B. | Groundnut |
| C. | Coconut |
| D. | Maize |
| Answer» D. Maize | |
| 227. |
Select the wrong statement: |
| A. | Anisogametes differ either in structure, function or behaviour |
| B. | In oomycetes female gamete is smaller and motile, while male gamete is larger and nonmotile |
| C. | Chlamydomonas exhibits both isogamy and anisogamy and fucus shows oogamy |
| D. | Isogametes are similar in structure, function and behaviour |
| Answer» C. Chlamydomonas exhibits both isogamy and anisogamy and fucus shows oogamy | |
| 228. |
When it was shown that animals could reproduce geometrically but didn't, Darwin concluded that |
| A. | The study from which the conclusions were drawn was flawed |
| B. | The mathematics was faulty |
| C. | They actually reproduce arithmetically |
| D. | They failed to reach their potential because of the selective action of nature |
| Answer» E. | |
| 229. |
Deductive reasoning- |
| A. | Is rarely applied in science |
| B. | Determines principles from observations |
| C. | Applies general principles to predict or explain specific results |
| D. | Uses specific observations to draw more general conclusions |
| Answer» D. Uses specific observations to draw more general conclusions | |
| 230. |
The study of the way individual traits are transmitted from one generation to the next is called |
| A. | Analogy |
| B. | Ecology |
| C. | Homology |
| D. | Genetics |
| Answer» E. | |
| 231. |
Darwin explained his theory of evolution in a book called |
| A. | Survival of the fittest |
| B. | The principles of population |
| C. | Around the world in eighty days |
| D. | On the origin of species |
| Answer» E. | |
| 232. |
Homologous structures among animals provide evidence for evolution in that these structures are |
| A. | All shown in the fossil record |
| B. | Similar in function, but of different basic structure |
| C. | Different in different animals, but are modifications of the same basic structure |
| D. | All produced by the same gene |
| Answer» D. All produced by the same gene | |
| 233. |
Flower in which pollination takes place by insect their pollen grains are- |
| A. | Smooth and dry |
| B. | Rough and stickly |
| C. | Rough and dry |
| D. | Large in size |
| Answer» C. Rough and dry | |
| 234. |
Besides paddy fields, cyanobacteria are also found inside vegetative part of |
| A. | Psilotum |
| B. | Pinus |
| C. | Cycas |
| D. | Equisetum |
| Answer» D. Equisetum | |
| 235. |
Chemical reactions could have converted simple organic compounds into ______ for the origin of life. |
| A. | Macromolecules |
| B. | Micromolecules |
| C. | Nitrogen, oxygen and other gases |
| D. | Cells |
| Answer» B. Micromolecules | |
| 236. |
Who wrote an essay on population growth that helped Darwin formulate his theory of evolution? |
| A. | Thomas malthus |
| B. | Charles lyell |
| C. | Karl popper |
| D. | Alfred russel wallace |
| Answer» B. Charles lyell | |
| 237. |
Global warming can be controlled by |
| A. | Increasing deforestation, reducing efficiency of energy usage |
| B. | Reducing deforestation, cutting down use of fossil fuel |
| C. | Reducing reforestation, increasing the use of fossil fuel |
| D. | Increasing deforestation, slowing down the growth of human population |
| Answer» C. Reducing reforestation, increasing the use of fossil fuel | |
| 238. |
Structures that have the same evolutionary origin even though they may now have different structures or functions are said to be |
| A. | Geometric |
| B. | Analogous |
| C. | Immutable |
| D. | Homologous |
| Answer» E. | |
| 239. |
What is meant by the term Darwin fitness? |
| A. | High aggressiveness |
| B. | Physical strength |
| C. | The ability to survive and reproduce |
| D. | None of these |
| Answer» D. None of these | |
| 240. |
The concept of chemical evolution is based on |
| A. | Effect of solar radiation on chemicals |
| B. | Interaction of water, air and clay under intense heat |
| C. | Possible origin of life by combination of chemicals under suitable environmental conditions |
| D. | Crystallization of chemicals |
| Answer» D. Crystallization of chemicals | |
| 241. |
Using general principles to analyze specific cases is called |
| A. | Natural reasoning |
| B. | Artificial reasoning |
| C. | Inductive reasoning |
| D. | Deductive reasoning |
| Answer» E. | |
| 242. |
The inflorescence of wheat is- |
| A. | Raceme |
| B. | Catkin |
| C. | Spike |
| D. | Panicle |
| Answer» D. Panicle | |
| 243. |
Which one of the following is not used for ex situ plant conservation? |
| A. | Shifting cultivation |
| B. | Botanical gardens |
| C. | Field gene banks |
| D. | Seed banks |
| Answer» B. Botanical gardens | |
| 244. |
Which of the following oils is gaining popularity as a cooking option in India? |
| A. | Olive |
| B. | Coconut |
| C. | Pongamia |
| D. | Peanut |
| Answer» C. Pongamia | |
| 245. |
Of the following biological levels of organization, which represents the smallest or lowest level? |
| A. | Cells |
| B. | Populations |
| C. | Organs |
| D. | Tissues |
| Answer» B. Populations | |
| 246. |
The tendency of population to remain in genetic equilibrium may be disturbed by |
| A. | Lack of mutations |
| B. | Lack of random mating |
| C. | Lack of migration |
| D. | Lack of mutations |
| Answer» C. Lack of migration | |
| 247. |
Homologous organs indicate the |
| A. | Parallel evolution |
| B. | Natural selection |
| C. | Convergent evolution |
| D. | Common descendent |
| Answer» E. | |
| 248. |
Isogamous condition with non-flagellated gametes is found in |
| A. | Spirogyra |
| B. | Fucus |
| C. | Chlamydomonas |
| D. | Volvox |
| Answer» B. Fucus | |
| 249. |
What is common to whale, seal and shark? |
| A. | Seasonal migration |
| B. | Homeothermy |
| C. | Convergent evolution |
| D. | Thick subcutaneous fat |
| Answer» D. Thick subcutaneous fat | |
| 250. |
Megasporangium is equivalent to |
| A. | Embryo sac |
| B. | Ovule |
| C. | Nucellus |
| D. | Fruit |
| Answer» C. Nucellus | |