MCQOPTIONS
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MCQOPTIONS
This section includes 14620 Mcqs, each offering curated multiple-choice questions to sharpen your NEET knowledge and support exam preparation. Choose a topic below to get started.
| 10201. |
The major factor in causing global warming is |
| A. | Increase in oxygen concentration in atmosphere |
| B. | Decrease in carbon dioxide concentration in atmosphere |
| C. | Increase in carbon dioxide concentration in atmosphere |
| D. | Decrease in atmospheric nitrogen |
| Answer» D. Decrease in atmospheric nitrogen | |
| 10202. |
Photic or euphotic zone is how much deep from the upper surface of sea |
| A. | 10 metres |
| B. | 100 metres |
| C. | 200 metres |
| D. | 500 metres |
| Answer» D. 500 metres | |
| 10203. |
A nonsucculent xerophyte with thick leathery leaves having white sticky waxy coating is [DPMT 1999] |
| A. | Nerium |
| B. | Calotropis |
| C. | Bryophyllum |
| D. | Ruscus |
| Answer» B. Calotropis | |
| 10204. |
The most striking difference between tropical rain forest and temperate forest is that [RPMT 1988] |
| A. | The tropical rain forests have preponderance of angiosperms while the temperate one have preponderance of gymnosperms |
| B. | The trees of temperate forests are taller than those of tropical rain forests |
| C. | Plants of temperate forests are comparatively more mesophytic |
| D. | Tropical forests are comparatively more homogeneous |
| Answer» E. | |
| 10205. |
The following cells cannot be grown under tissue culture conditions [MP PMT 1994] |
| A. | Hela cells |
| B. | Leucocytes |
| C. | Kidney cells |
| D. | Nerve cells |
| Answer» D. Nerve cells | |
| 10206. |
The microspore tetrad of angiosperm at the time of formation, are surrounded by a callose wall. Breakdown of this wall is brought about by the enzyme callase synthesized by the |
| A. | Tetrad cytoplasm |
| B. | Ribosome of the tetrad |
| C. | Spore mother cells |
| D. | Cells of tapetum |
| Answer» E. | |
| 10207. |
Phytohormones are [CBSE PMT 1990] |
| A. | Hormones regulating growth from seed to adulthood |
| B. | Growth regulators synthesised by plants and influencing physiological processes |
| C. | Hormones regulating flowering |
| D. | Hormones regulating secondary growth |
| Answer» C. Hormones regulating flowering | |
| 10208. |
One of the group of fibre yielding plants of economic importance is [CPMT 1990; MP PMT 1998] |
| A. | Gossypium, Hibiscus, Crotolaria, Cannabis |
| B. | Gossypium, Cassia, Lycopersicum |
| C. | Gossypium, Brassica, Glycine |
| D. | Gossypium, Agave, Nicotiana |
| Answer» B. Gossypium, Cassia, Lycopersicum | |
| 10209. |
Which one of the following diseases is due to an allergic reaction [CBSE PMT 1995] |
| A. | Enteric fever |
| B. | Hay fever |
| C. | Skin cancer |
| D. | Goitre |
| Answer» C. Skin cancer | |
| 10210. |
The plant which is used as a source of spice as well as dye is [BHU 1989] |
| A. | Turmeric |
| B. | Cardamom |
| C. | Clove |
| D. | Indigofera |
| Answer» B. Cardamom | |
| 10211. |
The point of sperm entry during fertilization forms [MP PMT 1998] |
| A. | Centre of rotation of embryo |
| B. | Axis of cleavage |
| C. | Grey crescent |
| D. | Dorsal lip of blastopore |
| Answer» C. Grey crescent | |
| 10212. |
Epidemiology deals with the study of |
| A. | Mode of transmission of diseases |
| B. | Disease causing organisms |
| C. | Development of resistance against diseases |
| D. | Skin ailments |
| Answer» B. Disease causing organisms | |
| 10213. |
In India, which state occupies first position in poultry farming [MP PMT 2003] |
| A. | Kerala |
| B. | M.P. |
| C. | Andhra Pradesh |
| D. | U.P |
| Answer» D. U.P | |
| 10214. |
A fibre of greatest commercial importance is derived from epidermis of seeds or outside the seed coat is [DPMT 1984; MP PMT 1984, 88; BHU 1980] |
| A. | Flax |
| B. | Coir |
| C. | Cotton |
| D. | Hemp |
| Answer» D. Hemp | |
| 10215. |
The first meiotic division in the oogonium is completed when the egg is within the |
| A. | Uterus |
| B. | Follicle |
| C. | Fallopian tube |
| D. | Ovary, before it is surrounded by follicles |
| Answer» C. Fallopian tube | |
| 10216. |
A boy happens to put his foot on a rusted nail and the doctor gives him an injection. Most likely he has given |
| A. | OPV |
| B. | BCG |
| C. | ATS |
| D. | Tetanospasmin |
| Answer» D. Tetanospasmin | |
| 10217. |
Poultry diseases include |
| A. | Fowl typhoid, blue tongue, ranikhet |
| B. | Fowl typhoid, tick fever, blue tongue |
| C. | Ranikhet, blue tongue, tick fever |
| D. | Fowl cholera, ranikhet, tick fever |
| Answer» E. | |
| 10218. |
Reserpine an alkaloid or drug extracted from roots of the following plant which cures the mental disorders and reduces or check the blood pressure or A hypertension drug is derived from [AFMC 1983, 85; AIIMS 1987; BHU 1989; MP PMT 1988, 90, 91, 99, 2001; RPMT 2002] |
| A. | Rauwolfia serpentina |
| B. | Ferula asafoetida |
| C. | Atropa belladona |
| D. | Digitalis perpurea |
| Answer» B. Ferula asafoetida | |
| 10219. |
Which one of the following is the effect of higher on the sperms |
| A. | Sperms become sluggish with longer life |
| B. | Sperms become less active with short life |
| C. | Sperms become highly active with longer life |
| D. | No effect |
| Answer» B. Sperms become less active with short life | |
| 10220. |
Infantile amaurotic idiocy (Tay-Sachs disease) is |
| A. | The result of severe protein deficiency in diet and damages the muscle development in growing children |
| B. | An inherited disorder in which the spinal cord and brain are severely damaged within a few months of birth leading to paralysis and mental retardation, and finally the infant's death in 3 or 4 years |
| C. | A genetic abnormality which appears at the age of 25-30 years and damages the bones |
| D. | A chromosomal disorder in young children |
| Answer» C. A genetic abnormality which appears at the age of 25-30 years and damages the bones | |
| 10221. |
Which one is not produced in aquaculture [BHU 2003] |
| A. | Oyster |
| B. | Silk worm |
| C. | Singhara |
| D. | Frog |
| Answer» C. Singhara | |
| 10222. |
Which of the following plant seeds are used as "jeweller's weight'' [RPMT 1983] |
| A. | Cajanus cajan |
| B. | Lens culinaris |
| C. | Glycine max |
| D. | Abrus precatorious |
| Answer» E. | |
| 10223. |
External stimulus which induces cleavage in an unfertilized ovum is called |
| A. | Fertilization |
| B. | Chemotaxis |
| C. | Paedogenesis |
| D. | Neoteny |
| Answer» B. Chemotaxis | |
| 10224. |
What causes a green plant to bend towards light as it grows [CPMT 1973, 84] |
| A. | Because green plants need light to carry on photosynthesis |
| B. | Because green plants are phototropic |
| C. | Light stimulates, plant cells on the lighted side to grow faster |
| D. | Auxin accumulates on shaded side stimulating greater cell elongation |
| Answer» E. | |
| 10225. |
The term 'aquaculture' means [CBSE PMT 1999] |
| A. | Aspergillosis |
| B. | Marine fisheries |
| C. | Inland fisheries |
| D. | b and c both |
| Answer» E. | |
| 10226. |
Which of the following provides 3 important ingradients of our food namely carbohydrates, fats and proteins [DPMT 1982] |
| A. | Ground nut |
| B. | Gram |
| C. | Castor |
| D. | Mango |
| Answer» B. Gram | |
| 10227. |
Sleep movements of leaves in certain plants are or photo nasty is due to [DPMT 1985] |
| A. | Excess of transpiration |
| B. | The leaves getting tired of carrying on photosynthesis |
| C. | Decrease in the intensity of light |
| D. | Differential growth at the base of leaf |
| Answer» D. Differential growth at the base of leaf | |
| 10228. |
Sprain is caused due to excessive pulling of |
| A. | Ligaments |
| B. | Muscles |
| C. | Nerves |
| D. | Tendons |
| Answer» B. Muscles | |
| 10229. |
The fibres of commercial importance are obtained from [AFMC 1981; CBSE PMT 1988] |
| A. | Parenchyma |
| B. | Collenchyma |
| C. | Chlorenchyma |
| D. | Sclerenchyma |
| Answer» E. | |
| 10230. |
At what stage the primitive streak in the chick embryo is formed |
| A. | 12 hours incubation |
| B. | 18 hours incubation |
| C. | 72 hours incubation |
| D. | 24 hours incubation |
| Answer» C. 72 hours incubation | |
| 10231. |
Clinostat is the apparatus used to [MP PMT 1990] |
| A. | Measure the rate of growth in plant |
| B. | Measure the quantity of auxin in plant |
| C. | Measure the effect of light on plant |
| D. | Eliminate the effect of gravity on plant |
| Answer» E. | |
| 10232. |
In angiosperms the pollen grain is normally pollinated at [AMU 2005] |
| A. | One cell stage |
| B. | Two celled stage |
| C. | Three celled stage |
| D. | Four celled stage |
| Answer» C. Three celled stage | |
| 10233. |
Lac is secreted by |
| A. | Salivary glands |
| B. | Cephalic glands |
| C. | Cutaneous glands |
| D. | Oral glands |
| Answer» D. Oral glands | |
| 10234. |
Cynosis refers to [AIIMS 1988] |
| A. | Bluish colouration of the body |
| B. | Reddish colouration of the body |
| C. | Pale colouration of the body |
| D. | Goose flesh of the body |
| Answer» B. Reddish colouration of the body | |
| 10235. |
In certain parts of India muscular distrophy is commonly found among the poor people because they eat cheap pulses of [BHU 1981] |
| A. | Phaseolus mungo |
| B. | Pisum sativum |
| C. | Lathyrus sativus |
| D. | Cicer |
| Answer» D. Cicer | |
| 10236. |
Polyspermy refers to |
| A. | Formation of many sperms by a male |
| B. | Changes in sperm nucleus |
| C. | Formation of many sperms |
| D. | Penetration of many sperms into an ovum simultaneously |
| Answer» E. | |
| 10237. |
Secondary nucleus in the middle of an embryo sac of angiosperms is [BHU 1999; AIEEE 2003] |
| A. | Diploid |
| B. | Triploid |
| C. | Tetraploid |
| D. | Haploid |
| Answer» B. Triploid | |
| 10238. |
Which disease in children is caused by intensive use of nitrate fertiliser [MP PMT 1996] |
| A. | Jaundice |
| B. | Methemoglobinemia |
| C. | Mumps |
| D. | Septicemia |
| Answer» C. Mumps | |
| 10239. |
Honey bee keeps the nectar for some time in its [CPMT 1993] |
| A. | Stomach |
| B. | Salivary gland |
| C. | Crop |
| D. | Mouth |
| Answer» D. Mouth | |
| 10240. |
A short-day plant was exposed to alternating red-far red treatments. What would happen if the last treatment was of far-red light |
| A. | Flowering would occur |
| B. | Flowering would not occur |
| C. | Plant would etiolate |
| D. | Plant would die |
| Answer» B. Flowering would not occur | |
| 10241. |
Which of the following is grown as most important source of textile fibres in Bengal [BHU 1978] |
| A. | Crotolaria |
| B. | Gossypium |
| C. | Corchorus |
| D. | Linum |
| Answer» D. Linum | |
| 10242. |
Fertilization restores [MP PMT 1994] |
| A. | Haploidy from diploidy |
| B. | Diploidy from polyploidy |
| C. | Polyploidy from diploidy |
| D. | None of these |
| Answer» E. | |
| 10243. |
'Itaria-itaria' disease is caused by |
| A. | Cadmium |
| B. | Manganese |
| C. | Mercury |
| D. | Zinc |
| Answer» B. Manganese | |
| 10244. |
Allergy involves [BCECE (Bihar) 2005] |
| A. | IgE |
| B. | IgG |
| C. | IgA |
| D. | IgM |
| Answer» B. IgG | |
| 10245. |
Herbicides prevent [MP PMT 1987] |
| A. | Water reabsorption |
| B. | Photolysis of water |
| C. | Transpiration |
| D. | Respiration |
| Answer» C. Transpiration | |
| 10246. |
Petroleum is derived from words 'Petra meaning rock and 'Oleum' meaning oil. Words 'Petra' and 'Oleum' are |
| A. | Greek words |
| B. | Latin words |
| C. | Indian words |
| D. | Chinese words |
| Answer» B. Latin words | |
| 10247. |
The chemical substance found in the surface layer of cytoplasm of spermatozoa is [MP PMT 1994] |
| A. | Fertilizin |
| B. | Agglutinin |
| C. | Antifertilizin |
| D. | Hyaluronidase |
| Answer» D. Hyaluronidase | |
| 10248. |
Which one of the following statements is true for the phytochrome [MP PMT 1995] |
| A. | Phytochrome is a phytohormone |
| B. | Phytochrome is a photosynthetic pigment |
| C. | Phytochrome is a pigment that controls growth, photomorphogenesis and development of many plants |
| D. | Phytochrome is a regulatory protein that controls several dark-dependent developmental processes |
| Answer» D. Phytochrome is a regulatory protein that controls several dark-dependent developmental processes | |
| 10249. |
For pollinated ovary which is correct [BHU 1999] |
| A. | Accessory cells are diploid |
| B. | Antipodal cells are haploid |
| C. | Egg cell is diploid |
| D. | Ovule cell is haploid |
| Answer» C. Egg cell is diploid | |
| 10250. |
One of the following aquatic weed has been exploited for biogas production [CPMT 1995] |
| A. | Cryptostegia |
| B. | Ceratophyllum |
| C. | Eicchornia |
| D. | Vallisneria |
| Answer» D. Vallisneria | |