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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.
| 10651. |
In nitrogen cycle, which of the following plays an important role |
| A. | Rhizopus |
| B. | Nitrobacter |
| C. | Mucor |
| D. | All green algae |
| Answer» C. Mucor | |
| 10652. |
Hairs occur in all mammals except those of [CBSE PMT 1988] |
| A. | Chiroptera |
| B. | Rodentia |
| C. | Cetacea |
| D. | Primates |
| Answer» D. Primates | |
| 10653. |
Which disease is caused in children due to excessive use of nitrate fertilizers [MP PMT 1996] |
| A. | Septicemia |
| B. | Jaundice |
| C. | Methaemoglobinaemia |
| D. | Mumps |
| Answer» D. Mumps | |
| 10654. |
Assertion : Central dogma is the flow of information from DNA to mRNA and then decoding the information present in mRNA in the form of protein. Reason : In retroviruses, reverse of central dogma occurs. |
| 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 | |
| 10655. |
Assertion : Bursa Fabricii lies on the dorsal side of the cloaca in birds. Reason : Bursa Fabricii is also known as cloacal thymus. |
| 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 | |
| 10656. |
Hybridomas are employed for [AIIMS 1986; MP PMT 2003] |
| A. | Synthesis of antibiotics |
| B. | Killing cancer cells |
| C. | Synthesis of monoclonal (somaclonal) antibodies |
| D. | Production of somatic hybrids |
| Answer» D. Production of somatic hybrids | |
| 10657. |
Assertion : In reptiles, hemipenes is present. Reason : Hemipenes is the combination of both ovary and penis. |
| 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 | |
| 10658. |
Assertion : One gene is required for one enzyme. Reason : Genes express themselves through synthesis of enzymes. |
| 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 | |
| 10659. |
Assertion : Metamorphosis in hemichordates is an important event. Reason : In metamorphosis, the larva gradually changes into the adult. |
| 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 | |
| 10660. |
Some blue green algae can be used as biofertilizer as they are [KCET 2002] |
| A. | Photosynthetic |
| B. | Surrounded by mucilage |
| C. | Growing everywhere |
| D. | Capable of fixing nitrogen |
| Answer» E. | |
| 10661. |
The study of chromosomes at meiotic diplotene shows that [CMC Vellore 1993; AIIMS 1985] |
| A. | The intimately paired chromosomes repel each other and begin to separate |
| B. | The pairing of homologous chromosomes which had initiated in the earlier stage is completed |
| C. | The homologous chromosomes remain united by chiasmata |
| D. | None of the above |
| Answer» D. None of the above | |
| 10662. |
Limbless amphibians belong to the order [MHCET 2000; BHU 2001; CPMT 2001] |
| A. | Anura |
| B. | Urodela |
| C. | Gymnophiona |
| D. | Squamata |
| Answer» D. Squamata | |
| 10663. |
Woodruf (1941) were responsible for the isolation of |
| A. | Neomycin |
| B. | Actinomycin |
| C. | Penicillin |
| D. | Streptomycin |
| Answer» C. Penicillin | |
| 10664. |
Read the assertion and reason carefully: Assertion : Runners are underground stem. Reason : Runners bear node and internodes. |
| 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. | |
| 10665. |
When a molecule of pyruvic acid is subjected to anaerobic oxidation and forms lactic acid, there is [BHU 1985; RPMT 1985; CPMT 1988] |
| A. | Loss of 3 ATP molecules |
| B. | Loss of 6 ATP molecules |
| C. | Gain of 2 ATP molecules |
| D. | Gain of 4 ATP molecules |
| Answer» B. Loss of 6 ATP molecules | |
| 10666. |
Removal of top fertile soil by wind or water is [CPMT 1980,84,85; JIPMER 1987, MP PMT 1988; BHU 1991] |
| A. | Siltation |
| B. | Soil erosion |
| C. | Weathering of soil |
| D. | Leaching |
| Answer» C. Weathering of soil | |
| 10667. |
Triploid condition is only present in |
| A. | Bryophytes |
| B. | Pteridophytes |
| C. | Gymnosperms |
| D. | Angiosperms |
| Answer» E. | |
| 10668. |
Assertion : In recombinant DNA technology, human genes are often transferred into bacteria (prokaryotes) or yeast (eukaryote). [AIIMS 2005] Reason : Both bacteria and yeast multiply very fast to form huge population which express the desired gene. |
| 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 | |
| 10669. |
Assertion : The cells of columnar epithelium in absorptive surfaces often bears microvilli on their free ends. Reason : Microvilli on their free ends. |
| 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 | |
| 10670. |
Food grains which provide the most important staple food for man are [DPMT 1986] |
| A. | Legume |
| B. | Cereals |
| C. | Oil seeds |
| D. | Millets |
| Answer» C. Oil seeds | |
| 10671. |
Monocondylic skull, dry skin and procoelus vertebrae are present in |
| A. | Amphibia |
| B. | Reptilia |
| C. | Birds |
| D. | Mammals |
| Answer» C. Birds | |
| 10672. |
The main structure of centriole is [BHU 1991] |
| A. | 9 + 3 fibrils |
| B. | 9 + 2 fibrils |
| C. | Nine triplets |
| D. | 13 globular subunits |
| Answer» D. 13 globular subunits | |
| 10673. |
Centromere is required for [CBSE PMT 2005] |
| A. | Transcription |
| B. | Crossing over |
| C. | Cytoplasmic cleavage |
| D. | Movement of chromosomes towards poles |
| Answer» E. | |
| 10674. |
One of the most important functions of botanical gardens is that [CBSE PMT 2005] |
| A. | They provide a beautiful area for recreation |
| B. | One can observe tropical plants there |
| C. | They allow ex-situ conservation of germ plasm |
| D. | They provide the natural habitat for wild life |
| Answer» D. They provide the natural habitat for wild life | |
| 10675. |
Largest animals belong to class [CPMT 1984] |
| A. | Arthropoda |
| B. | Pisces |
| C. | Mammalia |
| D. | Reptilia |
| Answer» D. Reptilia | |
| 10676. |
Assertion : Arthropods possess only true coelom. Reason : Haemocoel in arthropods is not lined by the mesodermal epithelium. |
| 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. | |
| 10677. |
Which of the following is a true nut [BHU 2005] |
| A. | Walnut |
| B. | Cashewnut |
| C. | Groundnut |
| D. | Pistachio |
| Answer» C. Groundnut | |
| 10678. |
The sperms employed for artificial insemination of cattle are stored in |
| A. | Liquid oxygen |
| B. | Dry ice |
| C. | Liquid ammonia |
| D. | Liquid nitrogen |
| Answer» E. | |
| 10679. |
Raw cheese is known as |
| A. | Blue cheese |
| B. | Cottage cheese |
| C. | Swiss cheese |
| D. | None of these |
| Answer» C. Swiss cheese | |
| 10680. |
In cancer cells [DPMT 1974] |
| A. | Meiosis takes place |
| B. | Mitosis takes place |
| C. | Sometimes meiosis and sometimes mitosis take place |
| D. | Cell division stops |
| Answer» C. Sometimes meiosis and sometimes mitosis take place | |
| 10681. |
Which of the following cells of connective tissue secrete antibodies [CPMT 2005] |
| A. | Mast cells |
| B. | Reticular cells |
| C. | Adipose cells |
| D. | Plasma cells |
| Answer» E. | |
| 10682. |
Cyanide resistant pathway is [DPMT 2004] |
| A. | Anaerobic respiration |
| B. | Aerobic respiration |
| C. | Both [a] and [b] |
| D. | None of these |
| Answer» B. Aerobic respiration | |
| 10683. |
Read the assertion and reason carefully: Assertion : Bats are attracted by the odour of fruits. Reason : They disperse soft and sweet fruits. |
| 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 | |
| 10684. |
In frog equal holoblastic cleavage does not found due to [RPMT 2001] |
| A. | A dark pigment in animal pole |
| B. | Heavy yolk in vegetal pole |
| C. | Yolk concentrated in center of egg |
| D. | Nucleus is assymetrical in position |
| Answer» C. Yolk concentrated in center of egg | |
| 10685. |
Pungency of chilli is due to [Orissa JEE 2005] |
| A. | Capsaicin |
| B. | Paperin |
| C. | Diosgenin |
| D. | Shikorin |
| Answer» B. Paperin | |
| 10686. |
Biosphere reserves are being threatened with [CBSE PMT 2000] |
| A. | Population growth |
| B. | Rains |
| C. | Pollution |
| D. | All the above |
| Answer» D. All the above | |
| 10687. |
Which of the following is an anti-forest conservation activity [DPMT 1982] |
| A. | Economy in lumbering |
| B. | Clear felling |
| C. | Preservation of fires |
| D. | Preservation of wild animals |
| Answer» C. Preservation of fires | |
| 10688. |
Which of the following is mainly responsible for the extinction of wild life [CBSE PMT 1999] |
| A. | Hunting for flesh |
| B. | Destruction of habitats |
| C. | Pollution of air and water |
| D. | All of these |
| Answer» E. | |
| 10689. |
Petroplants were first recognized by [MP PMT 1999] |
| A. | Lamarck |
| B. | Darwin |
| C. | Hatch and Slack |
| D. | M. Calvin |
| Answer» E. | |
| 10690. |
Assertion : Autotomy occurs in Sea star. Reason : Sea stars have great power of regeneration. |
| 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 | |
| 10691. |
Which one is an oviparous animal [CPMT 1984] |
| A. | Pigeon |
| B. | Whale |
| C. | Bat |
| D. | Amoeba |
| Answer» B. Whale | |
| 10692. |
Symbiotic nitrogen fixation in root nodules of some legumes is caused by [AFMC 1998] |
| A. | Nitrosomonas |
| B. | Rhizobium |
| C. | Azotobacter |
| D. | Nitrobacter |
| Answer» C. Azotobacter | |
| 10693. |
Which of the chloroplast does not contain grana |
| A. | Pea leaf |
| B. | Hydrophytic stem |
| C. | Bundle sheath of sugarcane leaf |
| D. | Mesophyll of grasses |
| Answer» D. Mesophyll of grasses | |
| 10694. |
In olden days cheese was prepared by [BVP 2003] |
| A. | Aspergillus |
| B. | Rennet enzyme |
| C. | Clostridium bacteria |
| D. | None of the above |
| Answer» C. Clostridium bacteria | |
| 10695. |
Which is involved in sedimentary cycle |
| A. | C |
| B. | N |
| C. | H |
| D. | S |
| Answer» E. | |
| 10696. |
Read the assertion and reason carefully: Assertion : Phyllotaxy deals with morphology of leaves. Reason : Foliage denotes all leaves of a plant. |
| 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. | |
| 10697. |
Assertion : Paraphyses are also called perigonial leaves. Reason : They are associated with the antheridia. |
| 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. | |
| 10698. |
Read the assertion and reason carefully to mark the correct option out of the options given below: Assertion : Regeneration blastema is a bud-like structure formed during regeneration of limb in salamander. Reason : Formation of regeneration blastema involves dedifferentiation. |
| 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 | |
| 10699. |
Axolotl is the name given to the larva of [KCET 1994] |
| A. | Silkworm |
| B. | Ambystoma |
| C. | Amphioxus |
| D. | Roundworm |
| Answer» C. Amphioxus | |
| 10700. |
Meiotic division in zygote takes place in [RPMT 1995] |
| A. | Thallophyta |
| B. | Angiosperms |
| C. | Gymnosperms |
| D. | Pteridophyta |
| Answer» B. Angiosperms | |