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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.
| 501. |
Assertion : Comparative biochemistry provides a strong evidence in favour of common ancestry of living beings. Reason : Genetic code is universal. [AIIMS 2005] |
| 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 | |
| 502. |
Rhizome which grows vertically upwards are [AFMC 2005] |
| A. | Corms |
| B. | Stolon |
| C. | Bulbils |
| D. | Root stock |
| Answer» E. | |
| 503. |
Recurrence of watery blisters on the genitalia and swollen lymph nodes in the groin are symptoms of: |
| A. | Genital warts |
| B. | Genital herpes |
| C. | Genital lesions |
| D. | Genital hepatitis |
| Answer» C. Genital lesions | |
| 504. |
In the given figure which marked number (1, 2, 3, 4) is tied and cut to block fertilisation. |
| A. | 1 |
| B. | 2 |
| C. | 3 |
| D. | 4 |
| Answer» B. 2 | |
| 505. |
In a stratified cambium, the fusiform initials are |
| A. | Long and overlap each other at the ends |
| B. | Short and overlap each other at the ends |
| C. | Short and arranged in horizontal tiers |
| D. | Short or long and overlap each other at the ends |
| Answer» D. Short or long and overlap each other at the ends | |
| 506. |
Assertion : Unlike thallophytes, bryophytes show formation of embryo. Reason : The embryo gives rise to gametophyte plant of bryophytes. |
| 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 | |
| 507. |
In Funaria, 20 chromosomes are present in rhizoids, then the number of chromosome in calyptra, rheca and foot will be: |
| A. | 20, 40, 40 respectively |
| B. | 40, 20, 20 respectively |
| C. | 20, 40, 20 respectively |
| D. | 40, 10, 20 respectively |
| Answer» B. 40, 20, 20 respectively | |
| 508. |
Which of the following molecules may be used as respiratory substrates? (i) Fats (ii) Carbohydrates (iii) Proteins (iv) Nucleic acid |
| A. | (i), (ii) and (iii) |
| B. | (i) and (ii) |
| C. | (ii) and (iv) |
| D. | (i) and (iii) |
| Answer» B. (i) and (ii) | |
| 509. |
All cells of sex organs are formed gametes in [RPMT 1995] |
| A. | Algae |
| B. | Bryophyta |
| C. | Pteridophyta |
| D. | Gymnosperm |
| Answer» B. Bryophyta | |
| 510. |
Assertion : ?Fungi imperfecti? does not show alternation of generation. Reason : The diploid phase is present in only zygote. |
| 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 | |
| 511. |
Read the assertion and reason carefully to mark the correct option out of the options given below: Assertion : Alcoholics may show deficiency symptoms of Wernicke's and Korsakoff's syndromes. Reason : Alcohol acts as depressant. |
| 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» C. If assertion is true but reason is false. | |
| 512. |
Partial parasite is dependent upon the host for [CPMT 1981, 86] |
| A. | Support |
| B. | Food at times |
| C. | Water |
| D. | Water and minerals |
| Answer» E. | |
| 513. |
Study the pathway given below. Which of the following option is correct? |
| A. | 123\[{{C}_{3}}\,acid\]Reduction\[{{C}_{4}}\,acid\] |
| B. | Fixation\[{{C}_{4}}\,acid\]Regeneration |
| C. | \[{{C}_{4}}\,acid\]Decarboxylation\[{{C}_{3}}\,acid\] |
| D. | Carboxylation\[{{C}_{3}}\,acid\]Reduction |
| Answer» D. Carboxylation\[{{C}_{3}}\,acid\]Reduction | |
| 514. |
Which of the following types of connective tissue is mismatched with its matrix? |
| A. | Areolar - Loosely packed matrix of protein fibres |
| B. | Bone - Mineralised matrix |
| C. | Cartilage - Highly vascular matrix |
| D. | Blood - Liquid matrix |
| Answer» D. Blood - Liquid matrix | |
| 515. |
Assertion : Malarial fever appear at merozoite stage of Plasmodium. Reason : The infective stage of Plasmodium is sporozoite. |
| 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 | |
| 516. |
In Drosophila, the sex is determined by: |
| A. | whether the egg is fertilised or develops parthenogenetically. |
| B. | the ratio of number of X-chromosomes to the sets of autosomes. |
| C. | X and Y chromosomes. |
| D. | the ratio of pairs of X-chromosomes to the pairs of autosomes. |
| Answer» C. X and Y chromosomes. | |
| 517. |
Alkaptonuria is: |
| A. | Sex linked dominant disorder |
| B. | Sex linked recessive disorder |
| C. | Autosomal recessive disorder |
| D. | Autosomal dominant disorder |
| Answer» D. Autosomal dominant disorder | |
| 518. |
Which of the following disease(s) is/are poultry disease? (i) Aspergillosis (ii) Ranikhet disease (iii) Gill rot (iv) Black rot |
| A. | (i) and (ii) |
| B. | (iii) and (iv) |
| C. | Only (iii) |
| D. | Only (iv) |
| Answer» B. (iii) and (iv) | |
| 519. |
Lathyrism which is caused by consumption of Khesari dal is a disease characterised by: |
| A. | reproductive failure, susceptibility to diabetes mellitus and skeletal abnormalities. |
| B. | retardation of body growth, precocious puberty and renal dysfunction. |
| C. | mental retardation, delay in the onset of puberty and cardiovascular abnormalities. |
| D. | gross skeletal deformation and thinning of collagen fibres and fibrils. |
| Answer» E. | |
| 520. |
What is the shape of a typical parenchyma cell |
| A. | Tetrahedron |
| B. | Circular |
| C. | Tetrakaidecahedron |
| D. | Conical |
| Answer» D. Conical | |
| 521. |
In some of the liverworts, there are special elongated cells called elaters that possess a helical thickening of the cell wall. As elaters lose water, they shrink longitudinally and compress the helical thickening like a spring. When the stress reaches a critical point, the compressed "spring" snaps back to its resting position, liberating hundreds of__ in all directions. |
| A. | Moisture particles |
| B. | Spores |
| C. | Sperm |
| D. | Ova |
| Answer» C. Sperm | |
| 522. |
In the formula G = rN (K - N)/K, the factor rN tends to cause the population to ____. |
| A. | remain stable at the carrying capacity |
| B. | grow at a slower rate than the (K - N/K) factor |
| C. | grow increasingly rapidly |
| D. | decrease in size |
| Answer» D. decrease in size | |
| 523. |
A population of 600 that experiences 65 births and 5 deaths during a one-year period. If the population maintains the current growth pattern, a plot of its growth would resemble: |
| A. | Exponential growth |
| B. | Fluctuating growth |
| C. | K-selected growth |
| D. | Logistic growth |
| Answer» B. Fluctuating growth | |
| 524. |
Who put forward the "Theory of linkage'' |
| A. | Sutton |
| B. | Morgan |
| C. | De Vries |
| D. | Bateson and Punnet |
| Answer» C. De Vries | |
| 525. |
Mechanical tissue consisting of living cells is [BHU 1981; CPMT 1981, 84; AFMC 1985; MP PMT 1984; AIIMS 1992] |
| A. | Sclerenchyma |
| B. | Collenchyma |
| C. | Chlorenchyma |
| D. | Parenchyma |
| Answer» C. Chlorenchyma | |
| 526. |
Read the assertion and reason carefully: Assertion : Cambium is a lateral meristem and cause growth in width. Reason : Cambium is made up of fusiform and ray initials in stem. [AIIMS 1998] |
| 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 | |
| 527. |
Ranikhet is the disease of: |
| A. | Poultry |
| B. | Fish |
| C. | Pigs |
| D. | Honeybee |
| Answer» B. Fish | |
| 528. |
India's wheat yield revolution in the 1960s was possible primarily due to: |
| A. | hybrid seeds. |
| B. | increased chlorophyll content. |
| C. | mutations resulting in plant height reduction. |
| D. | quantitative trait mutations. |
| Answer» D. quantitative trait mutations. | |
| 529. |
Coconut milk is used in tissue culture which consists of: |
| A. | Cytokinin |
| B. | Auxin |
| C. | Gibberellin |
| D. | Ethylene |
| Answer» B. Auxin | |
| 530. |
'Citrus canker' is caused by a [MP PMT 1997; BVP 2000] |
| A. | Fungus |
| B. | Bacterium |
| C. | Virus |
| D. | Nematoda |
| Answer» C. Virus | |
| 531. |
Riboflavin is: (MH-CET 2005) |
| A. | vitamin C |
| B. | vitamin D |
| C. | vitamin \[{{B}_{2}}\] |
| D. | vitamin \[{{B}_{6}}\] |
| Answer» D. vitamin \[{{B}_{6}}\] | |
| 532. |
In plants, growth is: |
| A. | Restricted to certain regions or structure |
| B. | Irreversible |
| C. | Change in size |
| D. | All of the above |
| Answer» E. | |
| 533. |
Assertion : Coacervates are belived to be the precursors of life. Reason : Coacervates were self-duplicating aggregates of proteins surrounded by lipid molecules [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» D. If both the assertion and reason are false | |
| 534. |
Petals possess claw in [CPMT 1985] |
| A. | Solanaceae |
| B. | Liliaceae |
| C. | Malvaceae |
| D. | Cruciferae |
| Answer» E. | |
| 535. |
To form one molecule of glyceraldehyde phosphate in Calvin cycle: |
| A. | 9 ATP and 36 NADPH are required |
| B. | 6 ATP and 6 NADPH are required |
| C. | 3 ATP and 3 NADPH are required |
| D. | 9 ATP and 6 NADPH are required |
| Answer» E. | |
| 536. |
Part of brain responsible for hearing is: |
| A. | Cerebellum |
| B. | Cerebrum |
| C. | Medulla |
| D. | Hypothalamus |
| Answer» C. Medulla | |
| 537. |
In the blind spot, where the optic nerves leave the eye: |
| A. | Rods and cones are absent. |
| B. | Only cones are present. |
| C. | Only rods are present. |
| D. | Special neurons are present. |
| Answer» B. Only cones are present. | |
| 538. |
An apomictic seed contains an embryo that is: |
| A. | Produced when two sperm fertilise one egg. |
| B. | Developed from one egg alone. |
| C. | The result of parental self - fertilisation. |
| D. | Genetically identical to its parent. |
| Answer» E. | |
| 539. |
The usage of binomial names, for plant species was accepted by all after the publication of the work by: |
| A. | Hooker |
| B. | Linnaeus |
| C. | Bentham |
| D. | Darwin |
| Answer» C. Bentham | |
| 540. |
What is meristems [MP PMT 2005] |
| A. | Dividing cells |
| B. | Non dividing cells |
| C. | Permanent cells |
| D. | Complex tissues |
| Answer» B. Non dividing cells | |
| 541. |
Carrot is micropropagated through: |
| A. | Embryo |
| B. | Embryoids |
| C. | Shoot culture |
| D. | Callus |
| Answer» E. | |
| 542. |
After culturing the anther of a plant, a few diploid plants were found along with haploid plants. The diploid plants could have arisen from: |
| 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 | |
| 543. |
The cells of a meristematic tissue are characterized by |
| A. | Thin walls and absence of intercellular spaces |
| B. | Highly vacuolated cytoplasm |
| C. | Large - sized nucleus and active cell division |
| D. | All the above |
| Answer» E. | |
| 544. |
Assertion : Balantidium coli lives in colon of human beings, only. Reason : The association is harmless. |
| 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 | |
| 545. |
Identify the correct option that describes all the three diagrams correctly. [a] [b] [c] |
| A. | A-Male cockroach, B-Funaria, C-Unisexual flower |
| B. | A-Male cockroach, B-Marchantia, C-Bisexual flower |
| C. | A-Female cockroach, B-Cycas, C-Unisexual flower |
| D. | A-Female cockroach, B-Marchantia, C-Bisexual flower |
| Answer» C. A-Female cockroach, B-Cycas, C-Unisexual flower | |
| 546. |
Which the following statements are correct? (i) Stamens are male reproductive part whereas carpels are female reproductive parts. (ii) In Spirogyra, asexual reproduction takes place by fragmentation. (iii) Vegetative propagation by leaves occurs in sweet potato. |
| A. | (i) and (ii) |
| B. | (ii) and (iii) |
| C. | (i) and (iii) |
| D. | All of the above |
| Answer» B. (ii) and (iii) | |
| 547. |
Which among the following has highest water potential? |
| A. | 1 m salt solution |
| B. | 1 m glucose solution |
| C. | Distilled water |
| D. | None of the above |
| Answer» D. None of the above | |
| 548. |
A normal woman, whose father was colour-blind is married to a normal man. The sons would be [CBSE PMT 2004; MH CET 2004] |
| A. | All normal |
| B. | All colour-blind |
| C. | 75% colour-blind |
| D. | 50% colour-blind |
| Answer» E. | |
| 549. |
Vessels are found in [CBSE PMT 2002] |
| A. | All pteridophyta |
| B. | All angiosperms |
| C. | Some gymnosperm |
| D. | Both [b] and [c] |
| Answer» E. | |
| 550. |
Read the assertion and reason carefully: Assertion : The largest cell of the embryo sac is central cell. Reason : It consists of a fused nuclei. |
| 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 | |