MCQOPTIONS
Saved Bookmarks
MCQOPTIONS
This section includes 1212 Mcqs, each offering curated multiple-choice questions to sharpen your Biology knowledge and support exam preparation. Choose a topic below to get started.
| 251. |
Virus is__________? |
| A. | unicellular |
| B. | multicellular |
| C. | acellular |
| D. | none of these |
| Answer» D. none of these | |
| 252. |
Viruses are considered living organisms because__________? |
| A. | They can be crystallized |
| B. | They occur in plants and animals |
| C. | They are microscopic |
| D. | They contain DNA and can be reproduced |
| Answer» E. | |
| 253. |
Virus consist of Parts:__________? |
| A. | 1 |
| B. | 2 |
| C. | 3 |
| D. | 4 |
| Answer» C. 3 | |
| 254. |
Villi and microvilli increase__________? |
| A. | digestion |
| B. | assimilation |
| C. | absorption |
| D. | ingestion |
| Answer» D. ingestion | |
| 255. |
Venus flower basket is also known as___________? |
| A. | Sycon |
| B. | Euplectella |
| C. | Leucoselenia |
| D. | Spongilla |
| Answer» C. Leucoselenia | |
| 256. |
Vascular Cambium initially appears as actively dividing cells between_________________? |
| A. | Primary Xylem and secondary xylem |
| B. | Primary xylem and secondary phloem |
| C. | Primary xylem and primary phloem |
| D. | Secondary xylem and secondary phloem |
| Answer» D. Secondary xylem and secondary phloem | |
| 257. |
Various tissue types combine to make up__________? |
| A. | Cells |
| B. | Organs |
| C. | Organ System |
| D. | Organelles |
| Answer» C. Organ System | |
| 258. |
Variety among amino acids is produced due to_____________? |
| A. | NH2 group |
| B. | COOH group |
| C. | R group |
| D. | All of these |
| Answer» D. All of these | |
| 259. |
Van neil hypothesis about the production of oxygen during phosynthesis was based on the study and investigations on___________? |
| A. | Bacteria |
| B. | Algae |
| C. | Protenema |
| D. | Cyanobacteria |
| Answer» B. Algae | |
| 260. |
Value of resting membrane potential is_____________? |
| A. | 0.03 V |
| B. | 0.05 V |
| C. | 0.07 V |
| D. | 0.09V |
| Answer» D. 0.09V | |
| 261. |
Vaccine was first developed by_______________? |
| A. | Louis Pasture |
| B. | Edward Jenner |
| C. | Jaber Ibn Hayan |
| D. | Aristotle |
| Answer» C. Jaber Ibn Hayan | |
| 262. |
Vacuoles are fluid filled sacs surrounded by a membrane called__________? |
| A. | tonoplast |
| B. | nuclear membrane |
| C. | cell membrane |
| D. | cell wall |
| Answer» B. nuclear membrane | |
| 263. |
Vaccine Was discovered by______________? |
| A. | Louis Pasteur |
| B. | Edward Jennar |
| C. | Ivanowski |
| D. | Stanely |
| Answer» C. Ivanowski | |
| 264. |
Unlike other algae, diatoms do not readily decay due to___________? |
| A. | Nonliving cells |
| B. | Siliceous wall |
| C. | Mucilaginous wall |
| D. | Water proof cell |
| Answer» C. Mucilaginous wall | |
| 265. |
Unicellular fungi which is non-hyphal is___________? |
| A. | Mushroom |
| B. | Yeast |
| C. | Penicillium |
| D. | Mold |
| Answer» C. Penicillium | |
| 266. |
Under unfavourable conditions, the Amoeba reproduces by ________ ? |
| A. | Binary fission |
| B. | Conjugation |
| C. | Encystment |
| D. | Endomixis |
| Answer» D. Endomixis | |
| 267. |
Under resting membrane potentials: |
| A. | Outer surface of neuron is more positive |
| B. | Inner surface of neuron is more positive |
| C. | Both of these surfaces are equally positive |
| D. | none of these |
| Answer» B. Inner surface of neuron is more positive | |
| 268. |
Under a compound microscope chromosome is made of arms and___________? |
| A. | Centromere |
| B. | Centrosome |
| C. | Chromatid |
| D. | Centromere |
| Answer» E. | |
| 269. |
Unbroken series of organisms arranged from ancestor to descendant sequence is____________? |
| A. | Biodiversity |
| B. | Phyletic lineage |
| C. | Connecting link |
| D. | Evolutionary line |
| Answer» C. Connecting link | |
| 270. |
Un-separated replica of chromosome is called___________? |
| A. | Chromatin |
| B. | Kinetochore |
| C. | Chromatid |
| D. | Centromere |
| Answer» D. Centromere | |
| 271. |
Ultra Microscopic viruses are the main cause of__________? |
| A. | Malaria |
| B. | Measles |
| C. | Mumps |
| D. | Cholera |
| Answer» D. Cholera | |
| 272. |
Types of behaviour enabling pillbugs to reach moist area is___________? |
| A. | Kinesis |
| B. | Taxes |
| C. | Instinct |
| D. | Learning |
| Answer» B. Taxes | |
| 273. |
Type of sensations carried by nociceptors are_________________? |
| A. | Touch |
| B. | Temperature |
| C. | Pressure |
| D. | Pain |
| Answer» E. | |
| 274. |
Type of neurons found exclusively in CNS are_____________? |
| A. | Sensory neurons |
| B. | Motor neurons |
| C. | Associative neurons |
| D. | None of these |
| Answer» D. None of these | |
| 275. |
Type of lichen which tightly attaches to rocks is_____________? |
| A. | Parmelia |
| B. | Fruticose |
| C. | Foliose |
| D. | Crustose |
| Answer» E. | |
| 276. |
Two or more populations of different species living and interacting in the same area form |
| A. | Biosphere |
| B. | Community |
| C. | Population System |
| D. | Ecosystem |
| E. | Species |
| Answer» C. Population System | |
| 277. |
True metamorphosis is not present in________? |
| A. | Crustacea |
| B. | Insecta |
| C. | Arachnida |
| D. | Myriapoda |
| Answer» D. Myriapoda | |
| 278. |
True roots absent in_____________? |
| A. | ferns |
| B. | bryophytes |
| C. | gymnosperms |
| D. | angiosperms |
| Answer» C. gymnosperms | |
| 279. |
Trisomy 21 is most common in mothers of the ________ age group. |
| A. | 15 to 19 |
| B. | 20 to 34 |
| C. | 35 to 39 |
| D. | 40 to 45 |
| Answer» E. | |
| 280. |
Triglyceride is also known as_____________? |
| A. | Natural lipid |
| B. | Neutral lipid |
| C. | Neutral wax |
| D. | All of these |
| Answer» C. Neutral wax | |
| 281. |
Tricuspid valve is present_____________? |
| A. | Between right atrium and right ventricle |
| B. | Between left atrium and left ventricle |
| C. | At base of pulmonary artery |
| D. | At base of aorta |
| Answer» B. Between left atrium and left ventricle | |
| 282. |
Transport of minerals from soil to epidermal cells of roots via carrier protein molcules along their concentration gradient is called___________? |
| A. | Diffusion |
| B. | Facilitated diffusion |
| C. | Passive transport |
| D. | Active transport |
| Answer» C. Passive transport | |
| 283. |
Total number of amino acids in a hemoglobin molecule are__________? |
| A. | 554 |
| B. | 564 |
| C. | 574 |
| D. | 584 |
| Answer» D. 584 | |
| 284. |
Total number of amino acids discovered so far in cells and tissues are______________? |
| A. | 20 |
| B. | 25 |
| C. | 150 |
| D. | 170 |
| Answer» E. | |
| 285. |
Today the land habitat is dominated by__________________? |
| A. | Fungi |
| B. | Gymnosperms |
| C. | Angiosperms |
| D. | Tracheophytes |
| Answer» E. | |
| 286. |
Tobacco mosaic virus is__________? |
| A. | Spherical |
| B. | Rod Shaped |
| C. | Tadpole like |
| D. | Hexagonal |
| Answer» C. Tadpole like | |
| 287. |
Tobacco mosaic virus was crystallized by__________? |
| A. | Pasteur |
| B. | Chamberland |
| C. | Stanely |
| D. | Ivanowski |
| Answer» D. Ivanowski | |
| 288. |
Tibia is a bone found in the ____________? |
| A. | Skull |
| B. | Arm |
| C. | Leg |
| D. | Face |
| Answer» D. Face | |
| 289. |
Thylakoids in chloroplasts are stacked into___________? |
| A. | Grana |
| B. | Stroma |
| C. | Nucleus |
| D. | None of these |
| Answer» B. Stroma | |
| 290. |
Those organisms which can prepare their own food from simple inorganic material and can store energy are called___________? |
| A. | Autotrophs |
| B. | Heterotrophs |
| C. | Procariotique |
| D. | Eu-cariotique |
| Answer» B. Heterotrophs | |
| 291. |
Those fungi which can grow only on their living host and cannot be grown on available defined growth culture medium e.g. various mildews and most rust species are called_____________? |
| A. | Parasitic fungi |
| B. | Obligate parasitic fungi |
| C. | Facultative parasitic fungi |
| D. | All of these |
| Answer» C. Facultative parasitic fungi | |
| 292. |
Those bacteria which are fully dependent upon their host for nutrition are called__________? |
| A. | Heterotrophic bacteria |
| B. | Chemosynthetic bacteria |
| C. | Saprophytic bacteria |
| D. | Parasitic bacteria |
| Answer» E. | |
| 293. |
Thick, waxy & leathery cuticle around leaves is present in___________? |
| A. | Hydrophytes |
| B. | Mesophytes |
| C. | Xerophytes |
| D. | Halophytes |
| Answer» D. Halophytes | |
| 294. |
They are widespread as protective coatings on fruits and leaves? |
| A. | cholesterol |
| B. | waxes |
| C. | chitin |
| D. | all of these |
| Answer» C. chitin | |
| 295. |
They are considered to be the most primitive and are surely the first of the vertebrates? |
| A. | Frogs |
| B. | Reptiles |
| C. | Amphibinas |
| D. | Jawless fishes |
| Answer» E. | |
| 296. |
They are present in the underground parts of the plants and stored food? |
| A. | leucoplast |
| B. | chromoplast |
| C. | chloroplast |
| D. | stem |
| Answer» B. chromoplast | |
| 297. |
Thermostat of human body is present in__________? |
| A. | Fore brain |
| B. | Hind Brain |
| C. | Thalamus |
| D. | Hypothalamus |
| Answer» E. | |
| 298. |
There are __________ types of nutrients needed by plants besides light to carry out photosynthesis |
| A. | Two |
| B. | Three |
| C. | Four |
| D. | Five |
| Answer» C. Four | |
| 299. |
There are _________ stomata per square cm of leaf surface in Tobacco plants? |
| A. | 1200 |
| B. | 12000 |
| C. | 100,000 |
| D. | 1000 |
| Answer» D. 1000 | |
| 300. |
There are mainly __________ types of tRNA? |
| A. | 170 |
| B. | 20 |
| C. | 25 |
| D. | 15 |
| Answer» C. 25 | |