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.
| 4301. |
In short day plants (SDP) flowering is induced by [CBSE PMT 1992] |
| A. | Long night |
| B. | Photoperiod less than 12 hours |
| C. | Photoperiod shorter than initial value and uninterrupted long night |
| D. | Short photoperiod and interrupted long night |
| Answer» D. Short photoperiod and interrupted long night | |
| 4302. |
Phytochrome is used in [BHU 1986] |
| A. | Flowering only |
| B. | Seed germination only |
| C. | Transpiration only |
| D. | All physiological processes exhibited by the plants such as seed germination, flowering (photoperiodism), stem elongation and transpiration |
| Answer» E. | |
| 4303. |
A hypothetical chemical involved in the flowering of plants is or Chemical agent which has important role in flowering is [DPMT 1986; CBSE PMT 1991] |
| A. | Gibberellin |
| B. | Kinetin |
| C. | Indole acetic acid |
| D. | Florigen |
| Answer» E. | |
| 4304. |
The term 'photoperiodism' was proposed by or The phenomenon of photoperiodism in plants was discovered by [BHU 1982, 85; MP PMT 1987, 94, 2002; CPMT 1987] |
| A. | Lysenko and Thimman |
| B. | Blackman and Skoog |
| C. | Garner and Allard |
| D. | Chailakhyan and Borthwick |
| Answer» D. Chailakhyan and Borthwick | |
| 4305. |
Which one of the following is an excellent example of physiological preconditioning |
| A. | Photosynthesis |
| B. | Respiration |
| C. | Photoperiodism |
| D. | Vernalization |
| Answer» D. Vernalization | |
| 4306. |
Phytochrome mediated process is |
| A. | Plastid orientation |
| B. | Flower induction |
| C. | Bud dormancy |
| D. | All the above |
| Answer» E. | |
| 4307. |
Pigment phytochrome is involved in [AIIMS 1989, 90; BHU 1980, 81; CBSE PMT 1988; RPMT 1992; Kerala CET 2001; 03] |
| A. | Phototropism |
| B. | Photorespiration |
| C. | Photoperiodism |
| D. | Geotropism |
| Answer» D. Geotropism | |
| 4308. |
Phytochrome is closely related to [RPMT 1999] |
| A. | Chlorophyll ?e? |
| B. | Bacterio chlorophyll |
| C. | Phycocyanin ?c? |
| D. | Carotinoid |
| Answer» D. Carotinoid | |
| 4309. |
Reversal of etiolation effect by light is called |
| A. | Richmond Lang effect |
| B. | Red-far red light interaction |
| C. | Photomorphogenesis |
| D. | Anisotropic wall expansion |
| Answer» D. Anisotropic wall expansion | |
| 4310. |
Name 'phytochrome' was given by [MP PMT 2001] |
| A. | Mothes |
| B. | Borthwick and Hendrick |
| C. | Sorokin et al |
| D. | Wickson and Thimman |
| Answer» C. Sorokin et al | |
| 4311. |
Prolongation of continuous darkness will initiate |
| A. | Early flowering in short day plants |
| B. | Delay flowering in short day plants |
| C. | Flowering will not be effected |
| D. | None of the above |
| Answer» B. Delay flowering in short day plants | |
| 4312. |
If dark period is interrupted by red light in SDP, the plant will show |
| A. | Early flowering |
| B. | Delay flowering |
| C. | Both possibilities |
| D. | No flowering |
| Answer» E. | |
| 4313. |
Garner and Allard have worked on |
| A. | Biloxy variety of soyabean |
| B. | Maryland mammoth variety of tobacco |
| C. | Both [a] and [b] |
| D. | None of the above |
| Answer» D. None of the above | |
| 4314. |
Which of the following is day neutral plant |
| A. | Tomato |
| B. | Cotton |
| C. | Sunflower |
| D. | All the above |
| Answer» E. | |
| 4315. |
With which of the following process Cholodny-Went theory is concerned [MP PMT 1990] |
| A. | Phototropism |
| B. | Photomorphogenesis |
| C. | Photorespiration |
| D. | Photoperiodism |
| Answer» B. Photomorphogenesis | |
| 4316. |
If the growing coleoptile tip is cut |
| A. | Phototropism stops |
| B. | Phototropism increase more |
| C. | Rate of photoperiodism remains unchanged |
| D. | None of the above |
| Answer» B. Phototropism increase more | |
| 4317. |
Which of the following process is called springization or springification |
| A. | Fertilization |
| B. | Pollination |
| C. | Vernalization |
| D. | None of the above |
| Answer» D. None of the above | |
| 4318. |
Photoperiodic stimulus is received by [MP PMT 1999] |
| A. | Leaves |
| B. | Buds |
| C. | Meristem |
| D. | Flowers |
| Answer» B. Buds | |
| 4319. |
Phytochromes are active in [MP PMT 1988] |
| A. | Blue light |
| B. | Green light |
| C. | Red light |
| D. | None of the above |
| Answer» D. None of the above | |
| 4320. |
Which of the following is required for formation of flowers in the plants |
| A. | Adequate oxygen |
| B. | Definite photoperiod |
| C. | Adequate manure |
| D. | Adequate water and minerals |
| Answer» C. Adequate manure | |
| 4321. |
Which of the following hormones can replace vernalization [CBSE PMT 1989; CPMT 1989; BHU 1994] |
| A. | Auxin |
| B. | Ethylene |
| C. | Gibberellins |
| D. | Cytokinins |
| Answer» D. Cytokinins | |
| 4322. |
In many plants the change over from vegetative to reproductive phase takes place in response to [NCERT 1978] |
| A. | The length of the day |
| B. | The severity of temperature |
| C. | Mainly the food material available in soil |
| D. | Oxygen present in the air |
| Answer» B. The severity of temperature | |
| 4323. |
When the dark period of short day plants is interrupted by a brief exposure of light, then the plant [AIIMS 1982; CBSE PMT 1994] |
| A. | Will not flower at all |
| B. | Flower immediately |
| C. | Give more flowers |
| D. | Turn into a long day plant |
| Answer» B. Flower immediately | |
| 4324. |
Which of the following phase in development of a sperm has no counterpart in development of an ovum |
| A. | Polar body formation |
| B. | Phase of multiplication |
| C. | Spermiogenesis |
| D. | Phase of growth |
| Answer» D. Phase of growth | |
| 4325. |
Normally the gametes are disease free in human beings or even in other animals because |
| A. | Germs cannot attack the gametes |
| B. | Gametes are immune to diseases |
| C. | The germplasm is segregated very early and is not subjected to diseases from which the somatic cells may suffer |
| D. | None of the above |
| Answer» D. None of the above | |
| 4326. |
Process of spermatogenesis is under the regulatory influence of |
| A. | Oxytocin |
| B. | Vassopressin |
| C. | Follicle stimulating hormone |
| D. | Luteotrophic hormone |
| Answer» D. Luteotrophic hormone | |
| 4327. |
Among the following who is regarded to be the founder of modern embryology |
| A. | Aristotle |
| B. | Newport |
| C. | Von Baer |
| D. | Spallanzani |
| Answer» D. Spallanzani | |
| 4328. |
The undifferentiated primordial germ cells are larger in size and their chromatin rich nuclei are distinct in |
| A. | Multiplication phase |
| B. | Growth phase |
| C. | Maturation phase |
| D. | All the above |
| Answer» B. Growth phase | |
| 4329. |
The immatured stage eggs are called as [CBSE PMT 1993] |
| A. | Microlecithal |
| B. | Oogenesis |
| C. | Oocyte |
| D. | Zygote |
| Answer» D. Zygote | |
| 4330. |
The process of maturation of reproductive cells of testes in male so as to form the male gamete or sperm is known as [AFMC 2003; Haryana PMT 2005] |
| A. | Spermatogenesis |
| B. | Gametogenesis |
| C. | Oogenesis |
| D. | None of these |
| Answer» B. Gametogenesis | |
| 4331. |
The rule of embryonic development was given by [MH-CET 2000; CPMT 2003] |
| A. | Von baer |
| B. | Haeckel |
| C. | Wallace |
| D. | Morgan |
| Answer» B. Haeckel | |
| 4332. |
Embryonic body form stage is characterised by [Pune CET 1998] |
| A. | Basic body plan emerging |
| B. | Miniature adult features |
| C. | Stage of development resembling other species |
| D. | Tissues not fully formed |
| Answer» D. Tissues not fully formed | |
| 4333. |
How many ova and sperms would be produced from 100 secondary oocytes and 100 secondary spermatocytes during gametogenesis in human [CPMT 1999; JIPMER 2001] |
| A. | 100 ova, 100 sperms |
| B. | 100 ova, 200 sperms |
| C. | 50 ova, 100 sperms |
| D. | 200 ova, 200 sperms |
| Answer» C. 50 ova, 100 sperms | |
| 4334. |
Oogenesis comprises [MP PMT 1998] |
| A. | Multiplication phase |
| B. | Growth phase |
| C. | Maturation phase |
| D. | All the above |
| Answer» E. | |
| 4335. |
Petroleum is also called |
| A. | Naphtha |
| B. | Rock oil |
| C. | Mineral oil |
| D. | All the above |
| Answer» E. | |
| 4336. |
Which one is not a petroleum product |
| A. | Naphtha |
| B. | Benzene |
| C. | Paraffin |
| D. | None of the above |
| Answer» E. | |
| 4337. |
Coal deposits of tertiary and cretaceous age are found in |
| A. | Raniganj |
| B. | Rajmahal hills |
| C. | Andaman and Nicobar |
| D. | All the above |
| Answer» D. All the above | |
| 4338. |
Best types of fossils are obtained in the form of |
| A. | Compressions |
| B. | Castes |
| C. | Coal balls |
| D. | None of the above |
| Answer» D. None of the above | |
| 4339. |
Which of the following is regarded as the coal age |
| A. | Silurian |
| B. | Devonian |
| C. | Carboniferous |
| D. | Coenozoic |
| Answer» D. Coenozoic | |
| 4340. |
Petroleum yielding plants or pteroplants belong to family [MP PMT 2004] |
| A. | Apocynaceae |
| B. | Asclepladaceae |
| C. | Euphorbiaceae |
| D. | All of these |
| Answer» E. | |
| 4341. |
Petroleum plant is [MP PMT 2003] |
| A. | Euphorbia lathyrus |
| B. | Brickellia sp |
| C. | Albizia |
| D. | Both a and b |
| Answer» E. | |
| 4342. |
Who is credited with identifying petro-crops [MP PMT 1999] |
| A. | Swaminathan |
| B. | Calvin |
| C. | Krebs |
| D. | Borlang |
| Answer» C. Krebs | |
| 4343. |
Most of the petrocrops belong to family [MP PMT 1999] |
| A. | Leguminosae |
| B. | Euphorbiaceae |
| C. | Rutaceae |
| D. | Malvaceae |
| Answer» C. Rutaceae | |
| 4344. |
Domestic cooking gas cylinder is filled with [MP PMT 1998] |
| A. | Alcohol |
| B. | Diesel oil |
| C. | Liquid petroleum gas |
| D. | Coal gas |
| Answer» D. Coal gas | |
| 4345. |
Energy source which do not remove \[C{{O}_{2}}\] [RPMT 1995] |
| A. | Oil |
| B. | Coke |
| C. | Nuclear energy |
| D. | Other organic substance |
| Answer» D. Other organic substance | |
| 4346. |
L.P.G. cooking gas is [MP PMT 1994] |
| A. | Low pressure gas |
| B. | Biogas |
| C. | Fossil fuel |
| D. | Low price gas |
| Answer» D. Low price gas | |
| 4347. |
Existence of coal and petroleum may be detected with the study of [MP PMT 1994] |
| A. | Palaeobotany |
| B. | Ecology |
| C. | Bacteriology |
| D. | Economic Botany |
| Answer» B. Ecology | |
| 4348. |
Which types of fossils are found in the form of coal balls |
| A. | Petrifactions |
| B. | Impressions |
| C. | Compressions |
| D. | All the above |
| Answer» B. Impressions | |
| 4349. |
The pioneer country in the production of fuel alcohol is [MP PMT 1994] |
| A. | Suadi Arabia |
| B. | Iran, Iraq |
| C. | Brazil |
| D. | Japan |
| Answer» D. Japan | |
| 4350. |
Coal is |
| A. | Renewable source |
| B. | Non-renewable source |
| C. | Cycling source |
| D. | All the above |
| Answer» C. Cycling source | |