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.
| 3201. |
The area of the plant which receives the stimulus is |
| A. | Perceptive region |
| B. | Responsive region |
| C. | Receptive region |
| D. | Reactive region |
| Answer» B. Responsive region | |
| 3202. |
The minimum time interval required between application of stimulus and production of response is |
| A. | Presentation time |
| B. | Relaxation time |
| C. | Conversion time |
| D. | Reaction time |
| Answer» E. | |
| 3203. |
Geotropic response is perceived by [CPMT 1999; DPMT 2001; Uttaranchal 2001] |
| A. | Mature roots |
| B. | Elongating cells |
| C. | Root cap |
| D. | Root hairs |
| Answer» D. Root hairs | |
| 3204. |
Peristome teeth of moss shows [RPMT 2000] |
| A. | Hydrochasy |
| B. | Xerochasy |
| C. | Hydrotropism |
| D. | Chemotropism |
| Answer» B. Xerochasy | |
| 3205. |
Movement of Sunflower towards the direction of Sun in [Haryana PMT 2000; Manipal 2001] |
| A. | Photonasty |
| B. | Phototropism |
| C. | Nyctinasty |
| D. | Seismonasty |
| Answer» C. Nyctinasty | |
| 3206. |
Plant movement in response to diffuse stimulus of light is [RPMT 1998] |
| A. | Phototropism |
| B. | Photolysis |
| C. | Phototaxis |
| D. | Photonasty |
| Answer» D. Photonasty | |
| 3207. |
Which movement occurs due to external stimulus [CPMT 1998] |
| A. | Tropic |
| B. | Nastic |
| C. | Tactic |
| D. | All the above |
| Answer» E. | |
| 3208. |
An apparatus commonly used to demonstrate phototropism is [CPMT 1984] |
| A. | Heliotropic chamber |
| B. | Clinostat |
| C. | Arc Auxanometer |
| D. | Potometer |
| Answer» B. Clinostat | |
| 3209. |
Example of positive geotropism is [Orissa 1997] |
| A. | Closing of flowers |
| B. | Upward growth of stem |
| C. | Downward growth of root |
| D. | Lateral growth of root |
| Answer» D. Lateral growth of root | |
| 3210. |
Bulliform cells in grass leaves show [AIIMS 1996] |
| A. | Growth movements |
| B. | Tropic movements |
| C. | Nastic movements |
| D. | Turgor movements |
| Answer» E. | |
| 3211. |
Some flowers (e.g., Oxalis) open in the morning and close during evening because of [RPMT 1996; AIIMS 1996; KCET 1998] |
| A. | Photonasty |
| B. | Phototropism |
| C. | Phototaxis |
| D. | Nyctinasty |
| Answer» B. Phototropism | |
| 3212. |
Movement of plant part in response to touch is [Orissa 1995; APMEE 1999] |
| A. | Seismonasty |
| B. | Thigmonasty |
| C. | Nutation |
| D. | None of the above |
| Answer» C. Nutation | |
| 3213. |
Closure of lid in Pitcher Plant is a [CBSE PMT 1995] |
| A. | Tropic movement |
| B. | Turgor movement |
| C. | Paratonic movement |
| D. | Autonomic movement |
| Answer» D. Autonomic movement | |
| 3214. |
Clinostat is employed in the study of [CBSE PMT 1993] |
| A. | Osmosis |
| B. | Growth movements |
| C. | Photosynthesis |
| D. | Respiration |
| Answer» C. Photosynthesis | |
| 3215. |
Movement of sperms towards archegonial necks due to component of their exudate is [CPMT 1992; RPMT 1998] |
| A. | Chemotropism |
| B. | Chemotaxis |
| C. | Phototaxis |
| D. | Hydrotropism |
| Answer» C. Phototaxis | |
| 3216. |
Geotropic response of roots is due to [MP PMT 1992] |
| A. | Inhibition of stem growth |
| B. | More growth on lower side |
| C. | More growth on upper side |
| D. | Uniform growth |
| Answer» D. Uniform growth | |
| 3217. |
Movements of leaves of sensitive plant, Mimosa pudica are due to [CBSE PMT 1988, 1999; CPMT 1989, 1991; AIIMS 1986; BHU 1997; CET Chd. 2002; Bihar PMT 2002; RPMT 1995, 2002; AFMC 1999; AMU 2002; MP PMT 2000] |
| A. | Thermonasty |
| B. | Seismonasty |
| C. | Hydrotropism |
| D. | Chemonasty |
| Answer» C. Hydrotropism | |
| 3218. |
Tendrils exhibit/twining of tendrils is due to [BHU 1989; CBSE PMT 1991, 95; MP PMT 1992; CPMT 1993; CET Chd. 2000; AIIMS 2000] |
| A. | Thigmotropism |
| B. | Seismonasty |
| C. | Heliotropism |
| D. | Diageotropism |
| Answer» B. Seismonasty | |
| 3219. |
Indian Telegraph plant is [BHU 1986] |
| A. | Butea monosperma |
| B. | Crotalaria juncea |
| C. | Madhuca indica |
| D. | Desmodium gyrans |
| Answer» E. | |
| 3220. |
Clinostat is connected with [BHU 1987] |
| A. | Thigmotropism |
| B. | Turgor changes |
| C. | Measurement of stomatal pores |
| D. | Geotropism |
| Answer» E. | |
| 3221. |
On touching the leaves of Mimosa pudica droop down because of [CPMT 1991; RPMT 1995, 1996; BHU 1997; AFMC 1999; MP PMT 2000; AMU 2002; RPMT 2002] |
| A. | Seismonasty |
| B. | Hydrotropism |
| C. | Chemonasty |
| D. | Thigmotropism |
| Answer» B. Hydrotropism | |
| 3222. |
Positive geotropic response of root is [DPMT 1982] |
| A. | Always |
| B. | Rarely |
| C. | Mostly |
| D. | Nil |
| Answer» D. Nil | |
| 3223. |
Both nyctinasty and thigmonasty are observed in [DPMT 1985] |
| A. | Drosera |
| B. | Mimosa |
| C. | Utricularia |
| D. | Cuscuta |
| Answer» B. Mimosa | |
| 3224. |
Thigmotropism is the response of the plant to [CPMT 1984] |
| A. | Gravity |
| B. | Water |
| C. | Light |
| D. | Contact |
| Answer» E. | |
| 3225. |
Phototropism in shoots is attributed to or phototropic movements are due to [MP PMT 1987; BHU 1979, 1981; AMU 1997; JKCMEE 2000; APMEE 1996] |
| A. | Auxin |
| B. | Gibberellins |
| C. | Cytokinin |
| D. | Abscisic acid |
| Answer» B. Gibberellins | |
| 3226. |
If the stem grows towards sunlight and root grows just opposite to it, the stem movement is called [AFMC 1980] |
| A. | Negative phototropic movement |
| B. | Phototropic movement |
| C. | Positive phototropic movement |
| D. | None of the above |
| Answer» D. None of the above | |
| 3227. |
Opening and closing of flowers represent a kind of [MP PMT 1991; CPMT 1993; APMEE 1999] |
| A. | Nastic movements |
| B. | Tropic movements |
| C. | Nutation movements |
| D. | Autonomic movements |
| Answer» B. Tropic movements | |
| 3228. |
Plant organs can detect a change in their orientation with respect of gravity [DPMT 1986] |
| A. | Within a few seconds |
| B. | Atleast a minimum of thirty minutes |
| C. | Atleast they have to be kept for a day |
| D. | Atleast they have to be kept for a weak |
| Answer» E. | |
| 3229. |
Jerky lateral leaflet movements of Desmodium gyrans are [CPMT 1991] |
| A. | Negative geotropic movements |
| B. | Positive geotropic movements |
| C. | Hydrotropic movements |
| D. | None of the above |
| Answer» E. | |
| 3230. |
A potted plant placed near the window bends outwardly due to [CPMT 1989] |
| A. | Greater oxygen availability to the tip |
| B. | More auxin content on the shaded side |
| C. | Greater light availability to tip |
| D. | Availability of necessary warmth to the tip |
| Answer» C. Greater light availability to tip | |
| 3231. |
Phototropism of stem and root are due to [MP PMT 1989] |
| A. | Differential hormonal effect |
| B. | Epinasty and hyponasty |
| C. | Effect of light |
| D. | Graviperception |
| Answer» B. Epinasty and hyponasty | |
| 3232. |
Nastic movements differ from tropic movements in being [AMU 1987] |
| A. | Movements of variation |
| B. | Nondirectional |
| C. | Directional |
| D. | Stimulated by chemicals. |
| Answer» C. Directional | |
| 3233. |
Bending of stem towards light is [BHU 1988; AFMC 1990] |
| A. | Photoperiodism |
| B. | Heliotropism |
| C. | Photonasty |
| D. | Hydrotropism |
| Answer» C. Photonasty | |
| 3234. |
Factors which can modify geotropic responses are [CPMT 1987] |
| A. | Root and shoot apices, temperature, light and atmospheric carbon dioxide |
| B. | Root and shoot apices, phytochrome, humidity and temperature |
| C. | Root and shoot apices, humidity and temperature |
| D. | None of the above |
| Answer» D. None of the above | |
| 3235. |
Pneumatophores show [AMU 1989, 1999] |
| A. | Positive geotropism |
| B. | Negative geotropism (ageotropism) |
| C. | Thigmotropism |
| D. | Negative phototropism |
| Answer» C. Thigmotropism | |
| 3236. |
Sleep movements in Samanea saman are regulated by [APMEE 2002] |
| A. | N |
| B. | P |
| C. | K |
| D. | Mg |
| Answer» D. Mg | |
| 3237. |
Which one of the following is an improved variety of maize |
| A. | N.P. 710 |
| B. | Co. 4 |
| C. | Jawahar |
| D. | S. 405 |
| Answer» D. S. 405 | |
| 3238. |
In India, earliest work in the field of plant breeding was initiated by |
| A. | Rao |
| B. | Barber |
| C. | Borlouge |
| D. | Vavilov |
| Answer» C. Borlouge | |
| 3239. |
Plant breeding has close relationship with |
| A. | Genetics |
| B. | Cytology |
| C. | Biometry |
| D. | Both a and b |
| Answer» B. Cytology | |
| 3240. |
Haploid from anther culture were first obtained in [CPMT 2005] |
| A. | Brassica |
| B. | Gossypium |
| C. | Nicotiana |
| D. | Datura |
| Answer» E. | |
| 3241. |
Heterosis requires [CPMT 2005] |
| A. | Selection |
| B. | Crossing |
| C. | Transformation |
| D. | Mutation |
| Answer» C. Transformation | |
| 3242. |
Production of plant without fertilization is done by [AFMC 2003] |
| A. | Vegetative propagation |
| B. | Transplantation |
| C. | Grafting |
| D. | None of these |
| Answer» B. Transplantation | |
| 3243. |
Which part of plant breeding is an art |
| A. | Technique in hybridization |
| B. | Clonal selection |
| C. | Pureline selection |
| D. | Acclimatization |
| Answer» B. Clonal selection | |
| 3244. |
The improved variety Indore 2 obtained by mutation breeding belongs to which of the following crop varieties [MHCET 2002] |
| A. | Bajra |
| B. | Cotton |
| C. | Sugar cane |
| D. | Potato |
| Answer» C. Sugar cane | |
| 3245. |
Haploid plants can be obtained by culturing [BVP 2001, 02] |
| A. | Young leaves |
| B. | Endosperm |
| C. | Pollen grains |
| D. | Root tips |
| Answer» D. Root tips | |
| 3246. |
Emasculation is a part of [CBSE PMT 2001; JIPMER 2002; BHU 2002; MHCET 2003, 04; DPMT 2004] |
| A. | Clonal selection |
| B. | Mass selection |
| C. | Hybridization |
| D. | Pure line selection |
| Answer» D. Pure line selection | |
| 3247. |
Selection is the method of [MP PMT 2001] |
| A. | Plant physiology |
| B. | Plant breeding |
| C. | Genetics |
| D. | Cytology |
| Answer» C. Genetics | |
| 3248. |
Who coined the term 'heterosis' [BHU 2004] |
| A. | Shull |
| B. | Huxley |
| C. | Robard |
| D. | Tansley |
| Answer» B. Huxley | |
| 3249. |
The process of mating of individuals, which are more closely related than the average of the population to which they belong, is called [BHU 2000] |
| A. | Inbreeding |
| B. | Hybridization |
| C. | Heterosis |
| D. | Self breeding |
| Answer» B. Hybridization | |
| 3250. |
A plant cell has potential to develop into full plant. This property of the plant cell is called [AIIMS 1998; HP PMT 2005] |
| A. | Tissue culture |
| B. | Totipotency |
| C. | Pleuripotency |
| D. | Gene cloning |
| Answer» C. Pleuripotency | |