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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.
| 10301. |
The bones of old persons become brittle due to accumulation of |
| A. | Calcium |
| B. | Magnesium |
| C. | Phosphorus |
| D. | None of these |
| Answer» B. Magnesium | |
| 10302. |
The ripening of fruits can be accelerated by [DPMT 1979, 85] |
| A. | Reducing the supply of water to plant when fruits are maturing |
| B. | Increasing the supply of nitrogen to the atmosphere surrounding them |
| C. | Warming up the surroundings artificially |
| D. | Artificially adding ethylene gas to the atmosphere surrounding them |
| Answer» E. | |
| 10303. |
Which is the most logical sequence with reference to the life cycle of angiosperms [DPMT 1993] |
| A. | Germination, endosperm formation, seed dispersal, double fertilization |
| B. | Pollination, fertilization, seed formation, germination |
| C. | Cleavage, fertilization, grafting, fruit formation |
| D. | Maturation, mitosis, differentiation, fertilization |
| Answer» C. Cleavage, fertilization, grafting, fruit formation | |
| 10304. |
Albino condition is found in which human race [CPMT 1977] |
| A. | All races |
| B. | White race |
| C. | Black race |
| D. | Mongols |
| Answer» B. White race | |
| 10305. |
Khaziranga wild life sanctuary is famous for [BVP 2002; KCET 2004] |
| A. | Tiger |
| B. | Musk deer |
| C. | Elephant |
| D. | Rhino |
| Answer» E. | |
| 10306. |
Eutrophication is due to [Wardha 2001] |
| A. | Air pollution |
| B. | Radiation pollution |
| C. | Water pollution |
| D. | Noise pollution |
| Answer» D. Noise pollution | |
| 10307. |
In the mountains, there is a lot of moisture and water and still the plants are xerophytes, because [CPMT 1985] |
| A. | Water turns into snow on mountains |
| B. | Water runs away due to the presence of slopes and cannot be used by plant (physiological dryness) |
| C. | Rocks of mountains cannot absorb water |
| D. | None of them is correct |
| Answer» C. Rocks of mountains cannot absorb water | |
| 10308. |
Which of the following is the cause of death |
| A. | Metabotic rate is affected |
| B. | Sudden check in blood circulation to brain and lungs |
| C. | Immune system does not work |
| D. | All of the above |
| Answer» E. | |
| 10309. |
Secretion of progesterone by corpus luteum is initiated by [CBSE PMT 1999] |
| A. | LH |
| B. | MSH |
| C. | Testosterone |
| D. | Thyroxine |
| Answer» B. MSH | |
| 10310. |
Went (1928) reported that auxin moves from apical to basal end i.e., basipetally the movement is quite fast, in root is about |
| A. | 0 to 1 cm/h |
| B. | 0.1 to 0.2 cm/h |
| C. | 0.2 to 0.3 cm/h |
| D. | 0.3 to 0.4 cm/h |
| Answer» C. 0.2 to 0.3 cm/h | |
| 10311. |
When the pollen grains are not transferred from anthers to the stigma in flower due to the barrier or fence, it is referred as or when some natural barrier exists between androecium and gynoecium to check self pollination, it is known as [AIIMS 1993] |
| A. | Heterostyly |
| B. | Herkogamy |
| C. | Dichogamy |
| D. | Cleistogamy |
| Answer» C. Dichogamy | |
| 10312. |
One of the following plants have contributed to coal formation [AFMC 2000] |
| A. | Pteridophytes |
| B. | Gymnosperms |
| C. | Bacteria |
| D. | Archaebacteria |
| Answer» C. Bacteria | |
| 10313. |
Grave's disease is caused by the hypersecretion of thyroid hormone and is associated with the |
| A. | Enlargement of the thyroid gland |
| B. | Increased BMR and increased nervous activity |
| C. | Exophthalamia |
| D. | All of the above |
| Answer» E. | |
| 10314. |
Severe Acute Respiratory Syndrome (SARS) [CBSE PMT 2004; AIIMS 2004] |
| A. | Is caused by a variant of Pneumococcus |
| B. | Is caused by a variant of the common cold virus (corona virus) |
| C. | Is an acute form of asthma |
| D. | Affects non-vegetarians much faster than the vegetarians |
| Answer» C. Is an acute form of asthma | |
| 10315. |
The term ?bio-magnification? refers to the [CET Chd. 1990; KCET 1997] |
| A. | Increase in population size |
| B. | Increase in the concentration of non-degradable pollutants as they pass through the food chains |
| C. | Blowing up of environmental issues by man |
| D. | Growth of organisation due to food consumption |
| Answer» C. Blowing up of environmental issues by man | |
| 10316. |
Silkworm silk is the product of [CBSE PMT 1995; AIEEE 2004] |
| A. | Salivary gland of the larva |
| B. | Cuticle of the adult |
| C. | Cuticle of the larva |
| D. | Salivary gland of the adult |
| Answer» B. Cuticle of the adult | |
| 10317. |
What types of fibres are found in plants |
| A. | Bast fibre |
| B. | Wood fibre |
| C. | Sclerenchyma of pericycle |
| D. | All the above |
| Answer» E. | |
| 10318. |
Which of the following has become extinct in India [RPMT 1995] |
| A. | Lion |
| B. | Tiger |
| C. | Two horned Rhino |
| D. | Dodo |
| Answer» D. Dodo | |
| 10319. |
The phenomenon in which nutrient enrichment of a water body supports a dense growth of one or may organisms but decreases the species diversity is called [AMU 2005] |
| A. | Biological magnification |
| B. | Species promotion |
| C. | Eutrophication |
| D. | None of the above |
| Answer» D. None of the above | |
| 10320. |
Concentration of nitrogen remains constant by [AFMC 2001] |
| A. | Nitrogen cycle |
| B. | Thundering and light |
| C. | Enzymes |
| D. | Both a and b |
| Answer» E. | |
| 10321. |
In recent years, there has been an increasing incidence of floods in the plains of northern India because [DPMT 1982, 83] |
| A. | There has been an increase in annual rainfall |
| B. | The rate of silting of dams has gone up |
| C. | There has been increased deforestation in the catchment areas |
| D. | Increased areas of land is being self-cultivated |
| Answer» C. There has been increased deforestation in the catchment areas | |
| 10322. |
The symptoms of ageing at the organismic level include decrease in the efficiency of |
| A. | Heart |
| B. | Lungs |
| C. | Kidneys |
| D. | All of the above |
| Answer» E. | |
| 10323. |
A genetically dwarf plant can be converted into a tall plant by the use of [MP PMT 1996] |
| A. | Kinetin |
| B. | \[G{{A}_{3}}\] |
| C. | IAA/X-rays |
| D. | 2, 4-D |
| Answer» C. IAA/X-rays | |
| 10324. |
Atretic follicles are found in the [MP PMT 1996, 2002] |
| A. | Liver |
| B. | Testis |
| C. | Thymus |
| D. | Ovary |
| Answer» E. | |
| 10325. |
Sperm cells of angiosperms differ from the rest of the plant groups like gymnosperms by [AFMC 1993] |
| A. | In angiosperms the sperm cells are non-motile whereas in the others they are flagellate |
| B. | In angiosperms the sperm cells are produced in the pollen grain whereas in the rest they are produced in the antheridium |
| C. | In angiosperms and gymnosperms the sperm cells are non-motile whereas in the rest they are flagellated |
| D. | None of the above |
| Answer» E. | |
| 10326. |
Producer gas is produced by ...... of wood |
| A. | Carbonization |
| B. | Gasification |
| C. | Pyrolysis |
| D. | Hydrolysis |
| Answer» C. Pyrolysis | |
| 10327. |
Name of the drug used in cancer treatment produced by using biotechnology is [Kerala PMT 2004] |
| A. | Terramycin |
| B. | HGH |
| C. | TSH |
| D. | Interferon |
| Answer» E. | |
| 10328. |
If the IIIrd nerve is damaged, it will lead to [CBSE PMT 1990] |
| A. | Loss of accomodation |
| B. | Dilation of pupil |
| C. | Loss of occular movements |
| D. | All of these |
| Answer» D. All of these | |
| 10329. |
Hormone produced against allergic reaction is [AFMC 1997] |
| A. | Epinephrine |
| B. | Nor-epinephrine |
| C. | Glucocorticoid |
| D. | Mineralocorticoid |
| Answer» B. Nor-epinephrine | |
| 10330. |
Silk is a |
| A. | Carbohydrate |
| B. | Lipid |
| C. | Protein |
| D. | None of the above |
| Answer» D. None of the above | |
| 10331. |
Photochemical smog formed in congested metropolitan cities mainly consists of [AIIMS 2003] |
| A. | Ozone, peroxyacetyl nitrate and \[N{{O}_{x}}\] |
| B. | Smoke, peroxyacetyl nitrate and \[S{{O}_{2}}\] |
| C. | Hydrocarbons, \[S{{O}_{2}}\] and \[C{{O}_{2}}\] |
| D. | Hydrocarbons, ozone and \[S{{O}_{x}}\] |
| Answer» C. Hydrocarbons, \[S{{O}_{2}}\] and \[C{{O}_{2}}\] | |
| 10332. |
If there was no\[C{{O}_{2}}\]in the earth's atmosphere, the temperature of earth's surface would be [CBSE PMT 1998] |
| A. | As such |
| B. | Less than the present level |
| C. | Increase from present level |
| D. | Dependent upon oxygen amount of the environment |
| Answer» C. Increase from present level | |
| 10333. |
In which part of the open sea producers are found [AMU 2005] |
| A. | Aphotic zone |
| B. | Abyssal zone |
| C. | Photic zone |
| D. | None of these |
| Answer» D. None of these | |
| 10334. |
As a person becomes old, a degenerative process sets in the body which causes [AIIMS 1992] |
| A. | A gradual alteration in the connective tissue components only |
| B. | Increase in the collagen content of the connective tissues only |
| C. | Increase in the mucopolysaccharides content of the most of the connective tissues only |
| D. | [a] and [b] both are correct |
| Answer» E. | |
| 10335. |
Implantation or uterine attachment of the blastocyst presumably occurs between |
| A. | and days after ovulation |
| B. | and days after ovulation |
| C. | and days after ovulation |
| D. | and days after ovulation |
| Answer» D. and days after ovulation | |
| 10336. |
Exogenous application of gibberellins induces male flower formation on genetically female plants in [AIIMS 1986] |
| A. | Carica |
| B. | Cucumis |
| C. | Coccinia |
| D. | Cucurbita |
| Answer» C. Coccinia | |
| 10337. |
The endosperm found in angiospermic seed is different from that of gymnosperms in the sense that, in the former [Bihar 1991] |
| A. | It is formed before fertilization while in the latter it is formed after fertilization |
| B. | It is formed after fertilization while in the latter it is formed before fertilization |
| C. | It is cellular while in the latter it is nuclear |
| D. | It is nutritive while in the latter it is protective |
| Answer» C. It is cellular while in the latter it is nuclear | |
| 10338. |
In sickle cell anaemia, the death is caused when the lethal genes are present in [AIIMS 1992] |
| A. | Heterozygous condition |
| B. | Homozygous dominant condition |
| C. | Homozygous recessive condition |
| D. | Co-dominant condition |
| Answer» C. Homozygous recessive condition | |
| 10339. |
Gasohol is |
| A. | 90% alcohol + 10% petrol |
| B. | 10% alcohol + 90% petrol |
| C. | 20% alcohol + 80% petrol |
| D. | 100% ethanol |
| Answer» C. 20% alcohol + 80% petrol | |
| 10340. |
Which of the following disease is due to an allergic reaction [AIIMS 1998; AFMC 2002] |
| A. | Goitre |
| B. | Enteric fever |
| C. | Skin cancer |
| D. | Hay fever |
| Answer» E. | |
| 10341. |
'Bombyx mori' feeds on or Food of silk worm is |
| A. | Mulberry fruits |
| B. | Mulberry leaves |
| C. | Ber leaves |
| D. | Castor leaves |
| Answer» C. Ber leaves | |
| 10342. |
Which one of these is an ex situ method of conservation [Kerala 2005] |
| A. | National park |
| B. | Botanical garden |
| C. | Tissue culture |
| D. | Genetic engineering |
| E. | Cryopreservation |
| Answer» F. | |
| 10343. |
Which of the following is general homeopathic medicine and given in general debility, chronic rheumatism, intermittent fevers, diarrhoea, hysteria, hydrophobia, cholera etc |
| A. | Nux vomica |
| B. | Belleric myrobalan |
| C. | Emblic |
| D. | Blonde psyllium |
| Answer» B. Belleric myrobalan | |
| 10344. |
Elephant is an inhabitant of hot climate. This is suggested by [CPMT 1971] |
| A. | Huge size |
| B. | Fleshy feet |
| C. | Almost hairless skin |
| D. | Small eyes |
| Answer» D. Small eyes | |
| 10345. |
Hydrological cycle comprises of two overlapping cycles |
| A. | Surface waters and atmospheric cycles |
| B. | Oceanic and fresh water cycles |
| C. | Ground water and atmospheric cycles |
| D. | Global and smaller cycles |
| Answer» B. Oceanic and fresh water cycles | |
| 10346. |
Good soil is [CPMT 1972, 78; MP PMT 1988] |
| A. | Which holds whole of water enters into it |
| B. | Which allows the limited amount of water into it |
| C. | Which allows to percolate the water slowly from it |
| D. | Which allows to pass water very quickly from it |
| Answer» D. Which allows to pass water very quickly from it | |
| 10347. |
Mr. X is eating curd/yoghurt. For this food intake in a food chain he should be considered as occupying [AIIMS 2003] |
| A. | First trophic level |
| B. | Second trophic level |
| C. | Third trophic level |
| D. | Fourth trophic level |
| Answer» D. Fourth trophic level | |
| 10348. |
Replacement of dead RBCs by new RBCs formed from the erythroblasts of the bone marrow by the process of erythropoeisis is an example of |
| A. | Growth |
| B. | Degrowth |
| C. | Reparative regeneration |
| D. | Restorative regeneration |
| Answer» D. Restorative regeneration | |
| 10349. |
Precocious puberty is |
| A. | Delayed puberty |
| B. | Puberty attained before the normal age |
| C. | Normal puberty |
| D. | None of these |
| Answer» C. Normal puberty | |
| 10350. |
Double fertilization process means [CBSE PMT 1991; CPMT 1972, 73, 81, 84, 87, 94, 95; NCERT 1969, 71; MP PMT 1997; DPMT 1983; BHU 1976, 82, 91, 99] |
| A. | Fusion of one male gamete nucleus with egg nucleus while fusion of other male gamete nucleus with secondary nucleus |
| B. | Fusion of male gamete nucleus with secondary nucleus |
| C. | Fusion of two polar nuclei with each other |
| D. | Fusion of male gamete nucleus with egg nucleus |
| Answer» B. Fusion of male gamete nucleus with secondary nucleus | |