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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.
| 12151. |
Assertion : Keber's organ in Unio is situated in front of the pericardium. Reason : Keber's organ has an important role in circulation. |
| A. | If both the assertion and the reason are true and the reason is a correct explanation of the assertion |
| B. | If both the assertion and reason are true but the reason is not a correct explanation of the assertion |
| C. | If the assertion is true but the reason is false |
| D. | If both the assertion and reason are false |
| E. | If the assertion is false but reason is true |
| Answer» D. If both the assertion and reason are false | |
| 12152. |
Angiosperm contains [AFMC 1996] |
| A. | Trachieds |
| B. | Vessels |
| C. | Both (a) and (b) |
| D. | None of these |
| Answer» D. None of these | |
| 12153. |
The tobacco plant Nicotiana tobacum belongs to the family [Pune CET 1998] |
| A. | Solanaceae |
| B. | Euphorbiaceae |
| C. | Urticaceae |
| D. | Moraceae |
| Answer» B. Euphorbiaceae | |
| 12154. |
Example of coenocytic algae is |
| A. | Vaucheria |
| B. | Chara |
| C. | Nostoc |
| D. | Polysiphonia |
| Answer» B. Chara | |
| 12155. |
'World Environment Day' is on [AMU 1989] |
| A. | 5th June |
| B. | 6th July |
| C. | 10th August |
| D. | 2nd October |
| Answer» B. 6th July | |
| 12156. |
Which one of the following is a non-vascular embryophyte |
| A. | Thallophyta |
| B. | Bryophyta |
| C. | Pteridophyta |
| D. | All the above |
| Answer» C. Pteridophyta | |
| 12157. |
After culturing the anther of a plant, a few diploid plants were found along with haploid plants. The diploid plants could have arisen from [AIIMS 1993] |
| A. | Generative cell of pollen |
| B. | Cells of anther wall |
| C. | Vegetative cell of pollen |
| D. | Exine of pollen wall |
| Answer» C. Vegetative cell of pollen | |
| 12158. |
Read the assertion and reason carefully to mark the correct option out of the options given below: Assertion : Fatty liver syndrome develops in alcoholics. Reason : In alcoholics accumulation of fats occur in liver. |
| A. | If both assertion and reason are true and the reason is the correct explanation of the assertion.\ |
| B. | If both assertion and reason are true but reason is not the correct explanation of the assertion. |
| C. | If assertion is true but reason is false. |
| D. | If the assertion and reason both are false. |
| E. | If assertion is false but reason is true. |
| Answer» B. If both assertion and reason are true but reason is not the correct explanation of the assertion. | |
| 12159. |
The primary precurser of IAA is [DPMT 1981; CPMT 1990] |
| A. | Phenyl alanine |
| B. | Tyrosine |
| C. | Tryptophan |
| D. | Leucine |
| Answer» D. Leucine | |
| 12160. |
Energy plantation refers to [Haryana PMT 1995] |
| A. | Setting up new electricity plants |
| B. | Growth of fuel wood trees |
| C. | Manufacture of more generators |
| D. | Erection of more dams |
| Answer» C. Manufacture of more generators | |
| 12161. |
Read the assertion and reason carefully: Assertion : All tissues lying inside vascular cambium are called as bark. Reason : Bark is made up of phellogen, phellem and phelloderm lying inside secondary phloem. [AIIMS 1994] |
| A. | If both the assertion and the reason are true and the reason is a correct explanation of the assertion |
| B. | If both the assertion and reason are true but the reason is not a correct explanation of the assertion |
| C. | If the assertion is true but the reason is false |
| D. | If both the assertion and reason are false |
| E. | If the assertion is false but reason is true |
| Answer» E. If the assertion is false but reason is true | |
| 12162. |
More than 70% of world?s freshwater is contained in [CBSE PMT 2005] |
| A. | Polar ice |
| B. | Glaciers and mountains |
| C. | Antartica |
| D. | Greenland |
| Answer» B. Glaciers and mountains | |
| 12163. |
Star shaped crystals found in Dioscorea are |
| A. | Druses |
| B. | Cystolith |
| C. | Lithocysts |
| D. | None of the above |
| Answer» B. Cystolith | |
| 12164. |
Biofertilizers include |
| A. | Nitrogen fixing bacteria |
| B. | Nitrogen fixing cyanobacteria |
| C. | Both bacteria and cyanobacteria |
| D. | Bacteria, cyanobactria and mycorrhizal fungi |
| Answer» C. Both bacteria and cyanobacteria | |
| 12165. |
Germinating barley seeds are employed in the preparation of [EAMCET 1987] |
| A. | Cheese |
| B. | Wine |
| C. | Beer |
| D. | Lactic acid |
| Answer» D. Lactic acid | |
| 12166. |
The number of chromosomes after I phase of meiotic division in reduction division [CPMT 1992, 94] |
| A. | Remain unchanged |
| B. | Become doubled |
| C. | Become halved |
| D. | None of the above |
| Answer» D. None of the above | |
| 12167. |
The agent/s which make/s free atmospheric nitrogen available to plants is/are |
| A. | Lightening |
| B. | Free living nitrogen fixing bacteria |
| C. | Symbiotic nitrogen fixing bacteria |
| D. | All of these |
| Answer» E. | |
| 12168. |
Assertion : Food web forms food chains. Reason : Only 10% energy passes to next trophic levels in food chain. |
| A. | If both the assertion and the reason are true and the reason is a correct explanation of the assertion |
| B. | If both the assertion and reason are true but the reason is not a correct explanation of the assertion |
| C. | If the assertion is true but the reason is false |
| D. | If both the assertion and reason are false |
| E. | If the assertion is false but reason is true |
| Answer» F. | |
| 12169. |
Assertion : Homosporous pteridophytes are exosporic. Reason : Heterosporous pteridophytes are endosporic. |
| A. | If both the assertion and the reason are true and the reason is a correct explanation of the assertion |
| B. | If both the assertion and reason are true but the reason is not a correct explanation of the assertion |
| C. | If the assertion is true but the reason is false |
| D. | If both the assertion and reason are false |
| E. | If the assertion is false but reason is true |
| Answer» C. If the assertion is true but the reason is false | |
| 12170. |
Read the assertion and reason carefully: Assertion : Epiphytes are called space parasites. Reason : Epiphytic roots possess velamen. |
| A. | If both the assertion and the reason are true and the reason is a correct explanation of the assertion |
| B. | If both the assertion and reason are true but the reason is not a correct explanation of the assertion |
| C. | If the assertion is true but the reason is false |
| D. | If both the assertion and reason are false |
| E. | If the assertion is false but reason is true |
| Answer» C. If the assertion is true but the reason is false | |
| 12171. |
Assertion : All bryophytes are land dwellers. Reason : Water is necessary to complete their life-cycle. |
| A. | If both the assertion and the reason are true and the reason is a correct explanation of the assertion |
| B. | If both the assertion and reason are true but the reason is not a correct explanation of the assertion |
| C. | If the assertion is true but the reason is false |
| D. | If both the assertion and reason are false |
| E. | If the assertion is false but reason is true |
| Answer» F. | |
| 12172. |
Typhoid fever is caused by [CBSE PMT 1998] |
| A. | Giardia |
| B. | Salmonella |
| C. | Shigella |
| D. | Escherichia |
| Answer» C. Shigella | |
| 12173. |
Assertion : Water is not required for fertilization process in ferns. Reason : Malic acid of archegonial neck attracts antherozoids. |
| A. | If both the assertion and the reason are true and the reason is a correct explanation of the assertion |
| B. | If both the assertion and reason are true but the reason is not a correct explanation of the assertion |
| C. | If the assertion is true but the reason is false |
| D. | If both the assertion and reason are false |
| E. | If the assertion is false but reason is true |
| Answer» F. | |
| 12174. |
Assertion : Intraspecific struggle occurs between the indviduals of different species. Reason : Lobster culture in aquarium is an example of interspecific struggle. |
| A. | If both the assertion and the reason are true and the reason is a correct explanation of the assertion |
| B. | If both the assertion and reason are true but the reason is not a correct explanation of the assertion |
| C. | If the assertion is true but the reason is false |
| D. | If both the assertion and reason are false |
| E. | If the assertion is false but reason is true |
| Answer» E. If the assertion is false but reason is true | |
| 12175. |
Assertion : Microcyst of myxamoebae lacks cell wall. Reason : Microcyst is formed in sexual reproduction of slime moulds. |
| A. | If both the assertion and the reason are true and the reason is a correct explanation of the assertion |
| B. | If both the assertion and reason are true but the reason is not a correct explanation of the assertion |
| C. | If the assertion is true but the reason is false |
| D. | If both the assertion and reason are false |
| E. | If the assertion is false but reason is true |
| Answer» F. | |
| 12176. |
Whale is a warm-blooded animal which lives in cold sea. Which organ of its body makes it hot [CPMT 1992; AIIMS 1993] |
| A. | Blubber |
| B. | Pelage |
| C. | Muscles |
| D. | Blood vessels |
| Answer» B. Pelage | |
| 12177. |
Most of female buffaloes show sign of heat in the |
| A. | Morning |
| B. | Afternoon |
| C. | Evening |
| D. | Night |
| Answer» E. | |
| 12178. |
Penicillin antibiotic which effects bacterial [BHU 1989] |
| A. | DNA replication |
| B. | Protein synthesis |
| C. | Plasma membrane properties |
| D. | Peptidoglycon synthesis (cell wall) |
| Answer» E. | |
| 12179. |
Assertion : Deposits of protein keratin are present in deeper layers of stratified keratinised squamous epithelium. Reason : Keratin makes this epithelium impervious to water. |
| A. | If both the assertion and the reason are true and the reason is a correct explanation of the assertion |
| B. | If both the assertion and reason are true but the reason is not a correct explanation of the assertion |
| C. | If the assertion is true but the reason is false |
| D. | If both the assertion and reason are false |
| E. | If the assertion is false but reason is true |
| Answer» F. | |
| 12180. |
Assertion : Torpedo is commonly known as electric ray. Reason : Torpedo possesses electric organs. |
| A. | If both the assertion and the reason are true and the reason is a correct explanation of the assertion |
| B. | If both the assertion and reason are true but the reason is not a correct explanation of the assertion |
| C. | If the assertion is true but the reason is false |
| D. | If both the assertion and reason are false |
| E. | If the assertion is false but reason is true |
| Answer» B. If both the assertion and reason are true but the reason is not a correct explanation of the assertion | |
| 12181. |
Read the assertion and reason carefully: Assertion : Tapetum helps in the liberation of microspores from tetrad. Reason : Tapetum shows callose activity. |
| A. | If both the assertion and the reason are true and the reason is a correct explanation of the assertion |
| B. | If both the assertion and reason are true but the reason is not a correct explanation of the assertion |
| C. | If the assertion is true but the reason is false |
| D. | If both the assertion and reason are false |
| E. | If the assertion is false but reason is true |
| Answer» B. If both the assertion and reason are true but the reason is not a correct explanation of the assertion | |
| 12182. |
The plant proteinases or endopeptidases enzyme is [CPMT 1994] |
| A. | Urease |
| B. | Papain |
| C. | Pepsin |
| D. | Trypsin |
| Answer» C. Pepsin | |
| 12183. |
The first fungicide discovered for plant disease control was |
| A. | Bordeaux mixture |
| B. | DDT |
| C. | Thiram |
| D. | Streptomycin |
| Answer» B. DDT | |
| 12184. |
Which of the following will show simple cell division |
| A. | Microspore mother cells |
| B. | Megaspore mother cells |
| C. | Archesporial cells |
| D. | All the above |
| Answer» D. All the above | |
| 12185. |
Assertion : Amoebiasis is caused by Amoeba. Reason : The protist feeds on red blood corpuscles. |
| A. | If both the assertion and the reason are true and the reason is a correct explanation of the assertion |
| B. | If both the assertion and reason are true but the reason is not a correct explanation of the assertion |
| C. | If the assertion is true but the reason is false |
| D. | If both the assertion and reason are false |
| E. | If the assertion is false but reason is true |
| Answer» F. | |
| 12186. |
In recent past human chromosomes have been studied by a technique using specific, often fluorescent dyes, known as [MP PMT 2002] |
| A. | Dyeing technique |
| B. | Banding technique |
| C. | Ultra dyeing technique |
| D. | Karyotyping technique |
| Answer» C. Ultra dyeing technique | |
| 12187. |
Auxin herbicide is [BVP 2001] |
| A. | NAA |
| B. | IAA |
| C. | 2, 4-D |
| D. | IBA |
| Answer» D. IBA | |
| 12188. |
Cleavage divisions differ from normal mitotic divisions in that [MP PMT 1994] |
| A. | There is no nuclear division during cleavage |
| B. | There is no division of the cytoplasm during cleavage |
| C. | There is no period of growth in between the divisions |
| D. | The division of the cytoplasm follows nuclear divisions |
| Answer» D. The division of the cytoplasm follows nuclear divisions | |
| 12189. |
Which one of the following insects produces honey [AIEEE 2003] |
| A. | Antherae paphia |
| B. | Apis indica |
| C. | Kerria lacca |
| D. | Bombyx mori |
| Answer» C. Kerria lacca | |
| 12190. |
Buck wheat yields 'Kutu' flour commonly used in religious fast. The plant belongs to |
| A. | Gramineae |
| B. | Leguminoseae |
| C. | Polygonaceae |
| D. | Poaceae |
| Answer» D. Poaceae | |
| 12191. |
'Dormin' is a |
| A. | Growth promotor |
| B. | Auxin |
| C. | Abscisic acid |
| D. | None of the above |
| Answer» D. None of the above | |
| 12192. |
Match the following and choose the correct combination from the options given [Kerala PMT 2004] Column I Column II A. Robert Hooke 1. Mutation theory B. Charles Darwin 2. Swan-necked flask experiment C. Hugo de vries 3. Origin of species D. Louis Pasteur 4. Micrographia |
| A. | A-3, B-4, C-1, D-2 |
| B. | A-2, B-1, C-3, D-4 |
| C. | A-1, B-2, C-3, D-4 |
| D. | A-4, B-3, C-1, D-2 |
| E. | A-4, B-2, C-3, D-1 |
| Answer» E. A-4, B-2, C-3, D-1 | |
| 12193. |
Who invented the method of identification of nutrient characters in Neurospora crassa [BHU 1985] |
| A. | Averbach and Robinson |
| B. | Beadle and Tatum |
| C. | Bateson and Punnet |
| D. | Luria and Dulecco |
| Answer» C. Bateson and Punnet | |
| 12194. |
Which of the following is not found in mammals [AMU 2005] |
| A. | Hepatic portal system |
| B. | Hypophysial portal system |
| C. | Renal portal system |
| D. | Hepatic and Hypophysial portal system |
| Answer» D. Hepatic and Hypophysial portal system | |
| 12195. |
\[{{G}_{2}}\]phase of mitosis takes [BVP 2003] |
| A. | 50% time of cell cycle |
| B. | 25 to 33% time of cell cycle |
| C. | 12 to 16% time of cell cycle |
| D. | 4% time of cell cycle |
| Answer» D. 4% time of cell cycle | |
| 12196. |
All life on earth derive its energy directly or indirectly from sun except [CBSE PMT 1994] |
| A. | Mushroom and mould |
| B. | Chemosynthetic bacteria |
| C. | Symbiotic bacteria |
| D. | Pathogenic bacteria |
| Answer» C. Symbiotic bacteria | |
| 12197. |
BHC and DDT belong to which class of pesticides [MP PMT 1997] |
| A. | Organophosphates |
| B. | Organochlorines |
| C. | Carbonates |
| D. | Triazines |
| Answer» C. Carbonates | |
| 12198. |
Which of the following statement is wrong as regards to man |
| A. | All eggs are alike |
| B. | Eggs are of two types |
| C. | Sperms are of two types |
| D. | None of the above |
| Answer» C. Sperms are of two types | |
| 12199. |
In Triticum vulgare, chromosome number is |
| A. | 2n = 42 |
| B. | 2n = 28 |
| C. | 2n = 14 |
| D. | 2n = 32 |
| Answer» B. 2n = 28 | |
| 12200. |
In the somatic cell cycle [CBSE PMT 2004] |
| A. | A short interphase is followed by a long mitotic phase |
| B. | \[{{G}_{2}}\]phase follows mitotic phase |
| C. | In \[{{G}_{1}}\]phase DNA content is double the amount of DNA present in the original cell |
| D. | DNA replication takes place in S-phase |
| Answer» E. | |