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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.
| 10451. |
Which of the following will be curable in next two decades [CBSE PMT 1997] |
| A. | Cancer |
| B. | Poliomyelitis |
| C. | Tuberculosis |
| D. | None of these |
| Answer» B. Poliomyelitis | |
| 10452. |
First artificial insemination was done in India at |
| A. | National Dairy Institute, Karnal (Haryana) |
| B. | Indian Veterinary Research Institute, Izatnagar (U.P.) |
| C. | Punjab Agricultural University, Ludhiana (Punjab ) |
| D. | Allahabad Agricultural Institute, Allahabad (U.P.) |
| Answer» E. | |
| 10453. |
In which bee wax glands are found [MP PMT 1995, 2000; BVP 2002] |
| A. | Queen bee |
| B. | Drone |
| C. | Workers |
| D. | Both in queen and worker bees |
| Answer» D. Both in queen and worker bees | |
| 10454. |
Geneticist plot the relative locations of genes on chromosomes by which of these methods [JIPMER 1993] |
| A. | Using powerful microscopes |
| B. | Calculating the number of genes |
| C. | Determining the frequency of crossing over |
| D. | Exposing animals to radiations |
| Answer» D. Exposing animals to radiations | |
| 10455. |
As a result of cleavages, if blastomeres are symmetrically placed around the polar axis the type of cleavage is known as |
| A. | Spiral |
| B. | Discoidal |
| C. | Biradial |
| D. | Radial |
| Answer» E. | |
| 10456. |
Storage sprouting of potato tubers can be prevented by treatment with low concentrations of |
| A. | Nicotinamide |
| B. | Naphthalene acetic acid |
| C. | Nitrogenous fertilizer |
| D. | Natural sunlight |
| Answer» C. Nitrogenous fertilizer | |
| 10457. |
Assertion : Exotoxins are relased by Gram +ve bacteria causing diseases to animals. Reason : Exotoxins are proteins to whose response WBC of animals react. |
| 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 | |
| 10458. |
New born mammals generally do not shiver inspite of lower temperature outside because of |
| A. | Brown fat which has larger capacity for generating heat |
| B. | White fat which has larger capacity for generating heat |
| C. | Chromatophores present in them |
| D. | Skeletal tissue present in them |
| Answer» B. White fat which has larger capacity for generating heat | |
| 10459. |
Read the assertion and reason carefully: Assertion : Proembryo stage is restricted to 2-celled stage. Reason : It has one basal and one apical cell. |
| 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. | |
| 10460. |
Assertion : Epitoky is seen in Nereis. Reason : Individual showing epitoky is called heteronereis. |
| 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 | |
| 10461. |
Azotobacter and Bacillus polymyxa are [CBSE PMT 1996] |
| A. | Decomposers |
| B. | Nonsymbiotic nitrogen fixers |
| C. | Symbiotic nitrogen fixers |
| D. | Pathogenic bacteria |
| Answer» C. Symbiotic nitrogen fixers | |
| 10462. |
Cell wall generally present in water conducting tissues are represented by swollen nodules is called |
| A. | Secondary wall |
| B. | Tertiary wall |
| C. | Primary wall |
| D. | None of the above |
| Answer» B. Tertiary wall | |
| 10463. |
The reptile which lacks penis belongs to [EAMCET 2000] |
| A. | Ophidia |
| B. | Crocodilia |
| C. | Gymnophiona |
| D. | Rhynchocephalia |
| Answer» E. | |
| 10464. |
Which group of vertebrates comprises the highest number of endangered species [CBSE PMT 2003] |
| A. | Birds |
| B. | Mammals |
| C. | Fishes |
| D. | Reptiles |
| Answer» C. Fishes | |
| 10465. |
Pristis belongs to the class [JIPMER 1994] |
| A. | Dipnoi |
| B. | Telostomi |
| C. | Elasmobranchii |
| D. | Holocephali |
| Answer» D. Holocephali | |
| 10466. |
Citric acid production is by action of [CBSE PMT 1995] |
| A. | Aspergillus niger |
| B. | Acetobacter |
| C. | Candida |
| D. | None of these |
| Answer» B. Acetobacter | |
| 10467. |
Zymogens are [MP PMT 1984; JIPMER 1987, 88; BHU 1988] |
| A. | Enzyme acting upon starch |
| B. | Group of zymase enzymes |
| C. | Inactive enzyme precursors |
| D. | None of the above |
| Answer» D. None of the above | |
| 10468. |
A practical application of an auxin is to induce |
| A. | Germination |
| B. | Transpiration |
| C. | Respiration |
| D. | Photosynthesis |
| Answer» B. Transpiration | |
| 10469. |
Neoteny is found in [RPMT 1995] |
| A. | Tadpole |
| B. | Salamander |
| C. | Hyla |
| D. | Axolotl |
| Answer» E. | |
| 10470. |
Bacterial blight of rice is caused due to [Orissa JEE 2004] |
| A. | Xanthomonas oryzae |
| B. | Helminthosporium oryzae |
| C. | Pseudomonas falcatum |
| D. | Xanthomonas falcatum |
| Answer» B. Helminthosporium oryzae | |
| 10471. |
The functional kidney of frog tadpole is [CBSE PMT 1995] |
| A. | Pronephros |
| B. | Mesonephros |
| C. | Metanephros |
| D. | Archinephros |
| Answer» B. Mesonephros | |
| 10472. |
Read the assertion and reason carefully to mark the correct option out of the options given below: Assertion : Intake of potato chips and french fries may induce cancer development. Reason : On heating, their carbohydrate changes into a carcinogenic chemical called acrylamide. |
| 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 | |
| 10473. |
Which of the following stage is affected by colchicum [BVP 2001; AFMC 2002; Pb. PMT 2004] |
| A. | Metaphase |
| B. | Prophase |
| C. | Interphase |
| D. | Anaphase |
| Answer» B. Prophase | |
| 10474. |
Assertion : Genomatic mutations arise due to change in ploidy. Reason : Genomic mutations are changes in the arrangement of genes. |
| 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 | |
| 10475. |
Genetically identical progeny is produced when an individual [AFMC 1994] |
| A. | Practices self-fertilization |
| B. | Produces identical gametes |
| C. | Practices reproduction |
| D. | Practices by breeding without meiosis |
| Answer» C. Practices reproduction | |
| 10476. |
Read the assertion and reason carefully: Assertion : Extra whorl of calyx is called epicalyx. Reason : Epicalyx is present as inner series of calyx. |
| 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 | |
| 10477. |
The upper part of sea water mainly contains [DPMT 1985] |
| A. | Nektons only |
| B. | Planktons only |
| C. | Nektons and planktons both |
| D. | None of the above |
| Answer» C. Nektons and planktons both | |
| 10478. |
When two genes are situated very close to each other in a chromosome [AIIMS 1980] |
| A. | The percentage of crossing over between them is very high |
| B. | Hardly any crossing over is detected |
| C. | No crossing over can take place between them |
| D. | Only double cross overs can take place between them |
| Answer» C. No crossing over can take place between them | |
| 10479. |
The grouping of human chromosomes is based on [CBSE PMT 1993] |
| A. | Secondary constrictions alone |
| B. | Dot-like satellites alone |
| C. | Banding patterns alone |
| D. | All the above |
| Answer» D. All the above | |
| 10480. |
The significance of meiosis lies in [MP PMT 1995, 98; BVP 2003] |
| A. | Reduction of the diploid number of chromosomes to haploid |
| B. | Maintaining constancy in the number of diploid chromosomes during sexual reproduction |
| C. | Production of genetic variability in the population of a species |
| D. | All the above |
| Answer» E. | |
| 10481. |
Basic structure of protein was given by [AFMC 2004] |
| A. | Stanley |
| B. | Nicholson |
| C. | Watson |
| D. | Singer |
| Answer» B. Nicholson | |
| 10482. |
Assertion : In humans, most sex-linked genes are present on the X chromosome. Reason : X-chromosome contains a large number of genes with major effects on phenotype. |
| 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 | |
| 10483. |
Aleurone grains are [BVP 2003] |
| A. | Enzymes |
| B. | Carbohydrates |
| C. | Protein |
| D. | Fat |
| Answer» D. Fat | |
| 10484. |
Which of the milk is nutritionally superior |
| A. | Cow |
| B. | Camel |
| C. | Goat |
| D. | Buffalo |
| Answer» E. | |
| 10485. |
The camel's hump is composed of a - tissue, which provides water when it is oxidised [AIIMS 1996] |
| A. | Skeletal |
| B. | Muscular |
| C. | Areolar |
| D. | Adipose |
| Answer» E. | |
| 10486. |
The phosphorus cycle differs from those of carbon and nitrogen as well as those of sulphur, oxygen and hydrogen in that it lacks |
| A. | Water |
| B. | Dust particles |
| C. | Gaseous phase |
| D. | All above |
| Answer» D. All above | |
| 10487. |
Who first studied the wheat rust problem in India |
| A. | Butler |
| B. | Dastur |
| C. | K.C. Mehta |
| D. | T.S. Sadashivan |
| Answer» D. T.S. Sadashivan | |
| 10488. |
Assertion : Serum can not be coagulated. Reason : Serum lacks the protein fibrinogen. |
| 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 | |
| 10489. |
The ground substance of connective tissue is basically composed of [MP PMT 1997] |
| A. | Mucopolysaccharides |
| B. | Lipids |
| C. | Monosaccharides |
| D. | Phospholipids |
| Answer» B. Lipids | |
| 10490. |
Enzyme having different molecular arrangement but similar functions is [BVP 2003, 04] |
| A. | Isoenzyme |
| B. | Holoenzyme |
| C. | Apoenzyme |
| D. | Co-enzyme |
| Answer» B. Holoenzyme | |
| 10491. |
Read the assertion and reason carefully: Assertion : Whole compound leaf of Clematis converts into tendril. Reason : Gloriosa superba shows whole leaf tendril. |
| 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 | |
| 10492. |
The strength and rigidity of a cell wall is due to the substance known as [MP PMT 1994] |
| A. | Suberin |
| B. | Cellulose |
| C. | Lignin |
| D. | Pectin |
| Answer» D. Pectin | |
| 10493. |
Birds differ from bats in the absence of [JIPMER 1985; CPMT 1989] |
| A. | 4-chambered heart |
| B. | Homoiothermy |
| C. | Diaphragm |
| D. | Tracheae |
| Answer» D. Tracheae | |
| 10494. |
Read the assertion and reason carefully: Assertion : Insects visit flowers to gather honey. Reason : Attraction of flowers prevents the insects from damaging other parts of the plant. [AIIMS 2004] |
| 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 | |
| 10495. |
Constancy of the chromosome number in successive generations is brought by the process of [AMU 1990; MP PMT 2003] |
| A. | Mitosis |
| B. | Meiosis |
| C. | Conjugation |
| D. | None of these |
| Answer» C. Conjugation | |
| 10496. |
Which of the following are the wild relatives of the cultivated rice |
| A. | Oryza perenis |
| B. | Oryza nivara |
| C. | Oryza rufipogon |
| D. | All the above |
| Answer» C. Oryza rufipogon | |
| 10497. |
Mitotic crossing over takes place in |
| A. | Normal mitosis |
| B. | Normal sexual cycle |
| C. | Parasexual cycle |
| D. | Lytic cycle |
| Answer» D. Lytic cycle | |
| 10498. |
Nitrogen is a critical element of the ecosystem because it is [BHU 1996] |
| A. | Essential element |
| B. | Abundant in atmosphere |
| C. | Labile |
| D. | Fixed by microbes |
| Answer» D. Fixed by microbes | |
| 10499. |
The cell wall of plant cells are |
| A. | Single layered |
| B. | Double layered |
| C. | Triple layered |
| D. | Any of the above |
| Answer» D. Any of the above | |
| 10500. |
Thermal algae are forms which grow and survive [NCERT 1983] |
| A. | In tropical regions where the temperature range is high |
| B. | In hot water springs where the temperature remains around \[70{}^\circ C\] |
| C. | On the huge rocks exposed to bright sunlight |
| D. | In deserts where the temperature in summer remains around \[70{}^\circ C\] |
| Answer» C. On the huge rocks exposed to bright sunlight | |