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.
| 551. |
In the models that describe population growth r stands for: |
| A. | population density |
| B. | a time interval |
| C. | total number of individuals in the population. |
| D. | growth rate |
| Answer» E. | |
| 552. |
One of the following is not applicable to Escherichia coli |
| A. | Transformation |
| B. | Transduction |
| C. | Flagella |
| D. | Diploid |
| Answer» E. | |
| 553. |
Which of the following statement is/are correct regarding digestive system of cockroach? (i) Mouth opens into a short tubular pharynx, leading to a narrow tubular passage called oesophagus. (ii) Gizzard helps in grinding the food particles. (iii) A ring of 6-8 blind tubules called hepatic or gastric caecae is present at the junction of foregut and midgut, which secrete digestive juice. (iv) At the junction of midgut and hindgut is present another ring of 100-150 yellow coloured thin filamentous malphigian tubules which help in removal of excretory products from haemolymph. |
| A. | Only (i) |
| B. | Both (ii) and (iii) |
| C. | Both (i) and (iv) |
| D. | All of these |
| Answer» E. | |
| 554. |
Given below is a table comparing the effects of sympathetic and parasympathetic nervous system. Which of the following feature is correctly described? |
| A. | FeatureSympathetic nervous systemParasympathetic nervous systemSalivary glandsStimulates secretionInhibits secretion |
| B. | Pupil of eyeDilatesConstricts |
| C. | Heart rateDecreasesIncreases |
| D. | Intestinal peristalsisStimulates secretionInhibits secretion |
| Answer» C. Heart rateDecreasesIncreases | |
| 555. |
Eye lens focus light on the retina containing rod cells, which are receptors. Number of rod cells in eyes are: |
| A. | 120 million |
| B. | 105 million |
| C. | 150 million |
| D. | 118 million |
| Answer» B. 105 million | |
| 556. |
The protein coat of virus is called [BHU 1999] |
| A. | Capsid |
| B. | Cosmid |
| C. | Capsomere |
| D. | Chromophore |
| Answer» B. Cosmid | |
| 557. |
Assertion : Isogamy is a primitive type of sexual reproduction. Reason : The gametes are of different sizes. |
| 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 | |
| 558. |
Assertion : Pinus displays the alternation of generations. Reason : The gametophyte is dependent upon the sporophyte phase. |
| 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 | |
| 559. |
Root cap has no role in water absorption because: |
| A. | it has no direct connection with the vascular system. |
| B. | it has no cells containing chloroplasts. |
| C. | it has no root hairs. |
| D. | it has loosely arranged cells. |
| Answer» D. it has loosely arranged cells. | |
| 560. |
The phage which does not destroy the host cell but infects it, is called |
| A. | Cyanophage |
| B. | T2 phage |
| C. | Virulent phage |
| D. | l phage |
| Answer» E. | |
| 561. |
Which of the family does not possess axile placentation [RPMT 1992, 95, 96] |
| A. | Solanaceae |
| B. | Malvaceae |
| C. | Leguminosae/Cruciferae |
| D. | Liliaceae |
| Answer» D. Liliaceae | |
| 562. |
Axile placentation occurs in [APMEE 1991] |
| A. | Asteraceae and Fabaceae |
| B. | Brassicaeae and Solanaceae |
| C. | Solanaceae and Liliaceae |
| D. | Brassicaceae and Solanaceae |
| Answer» D. Brassicaceae and Solanaceae | |
| 563. |
Persistant root hairs are present in |
| A. | Eichhornia |
| B. | Schizaca rupestris |
| C. | Commelina |
| D. | Pisties |
| Answer» C. Commelina | |
| 564. |
The layer of cells outside the phloem meant for giving rise to the root branches is called [Kerala CET 2003] |
| A. | Cambium |
| B. | Carpus |
| C. | Endodermis |
| D. | Pericycle |
| Answer» E. | |
| 565. |
Monocytes are how much percent of total W.B.C. |
| A. | 0.053 |
| B. | 0.3 |
| C. | 0.004 |
| D. | 0.023 |
| Answer» B. 0.3 | |
| 566. |
Heme protein complexes that act as oxidizing agents during plant respiration are known as: |
| A. | Chlorophyll |
| B. | Haemoglobin |
| C. | Myoglobin |
| D. | Cytochrome |
| Answer» E. | |
| 567. |
Oral vaccine for polio was discovered by |
| A. | Sinsheimer |
| B. | Salk and Sabin |
| C. | Temin |
| D. | Lwoff |
| Answer» C. Temin | |
| 568. |
Given below is a highly simplified representation of the human sex chromosomes from a karyotype. The gene a and b could be of: |
| A. | colour blindness and body height. |
| B. | attached ear lobe and Rhesus blood group. |
| C. | haemophilia and red-green colour blindness. |
| D. | phenylketonuria and haemophilia. |
| Answer» D. phenylketonuria and haemophilia. | |
| 569. |
Match the terms given in column-I with their description given in column-II and choose the correct option. Column-I Column-II A. ABO blood groups I. Dihybrid cross B. Low of segregation II. Monohybrid cross C. Low of Independent assortment III. Base pairs substitution D. Gene mutation IV. Multiple allelism |
| A. | A-II; B-I; C-IV; D-III |
| B. | A-IV; B-I; C-II; D-III |
| C. | A-IV; B-II; C-I; D-III |
| D. | A-II; B-III; C-IV; D-I |
| Answer» D. A-II; B-III; C-IV; D-I | |
| 570. |
Mary's father has haemophilia but her husband is also haemophilic. What would be the chance other daughter having this disease? |
| A. | 0% |
| B. | 0.5 |
| C. | 100% |
| D. | 0.25 |
| Answer» E. | |
| 571. |
Peroxisomes do not have |
| A. | D-amino acid oxidase |
| B. | \[\beta -\]hydroxy acid oxidase |
| C. | Urate oxidase |
| D. | Amylase |
| Answer» E. | |
| 572. |
G-6-P dehydrogenase deficiency is associated with haemolysis of [CBSE PMT 2005] |
| A. | Lymphocytes |
| B. | RBCs |
| C. | Platelets |
| D. | Leucocytes |
| Answer» C. Platelets | |
| 573. |
Assertion : Ascus mother cells are dikaryotic. Reason : Meiosis occur there without karyogamy. |
| 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 | |
| 574. |
\[{{C}_{4}}\]plants are adapted to: |
| A. | Hot and dry climate |
| B. | Temperate climate |
| C. | Cold and dry climate |
| D. | Hot and humid climate |
| Answer» B. Temperate climate | |
| 575. |
First organisms to evolve on the earth were [CBSE PMT 2001] |
| A. | Saprotrophs |
| B. | Chemohetrotrophs |
| C. | Photoautotrophs |
| D. | Chemoautotrophs |
| Answer» C. Photoautotrophs | |
| 576. |
Fruit in members of solanaceae is [CPMT 2005] |
| A. | Drupe |
| B. | Capsule or berry |
| C. | Siliqua |
| D. | Pod or achene |
| Answer» C. Siliqua | |
| 577. |
Rickets occurs in children due to the deficiency of vitamin: (Chandigarh CET 2006) |
| A. | A |
| B. | D |
| C. | C |
| D. | B |
| Answer» C. C | |
| 578. |
Which of the following are characteristics of living things |
| A. | They reproduce |
| B. | They acquire energy |
| C. | They respond to stimuli |
| D. | All of the above |
| Answer» E. | |
| 579. |
Commercial silk is obtained from [MP PMT 1994, 2003; MHCET 2000] |
| A. | Cocoon/pupa |
| B. | Caterpillar |
| C. | Adult moth |
| D. | Both egg and adult moth |
| Answer» B. Caterpillar | |
| 580. |
Match column-I (function) with column-II (types of enzymes) and select the correct option. Column-I Column-II A. Squamous I. Intestinal glands B. Cuboidal II. Trachea C. Columnar III. Ovary' D. Ciliated IV. Blood vessels E. Pseudo stratified V. Bronchioles |
| A. | A-I; B-II; C-IV; D-III; E-V |
| B. | A-V; B-IV; C-II; D-I; E-III |
| C. | A-IV; B-V; C-1; D-II; E-III |
| D. | A-IV; B-III; C-I; D-V; E-II |
| Answer» E. | |
| 581. |
In sclerenchymatous cells, the lignin deposition |
| A. | Is sometimes absent |
| B. | Begin from primary to secondary walls |
| C. | Begin from secondary to primary |
| D. | Is confined to middle lamella |
| Answer» C. Begin from secondary to primary | |
| 582. |
Gynandromorphs develop in Drosophila when the two cells in the two-celled proembryo will have one of the following chromosomal sets [MP PMT 1997] |
| A. | 2A + XX in one cell and 2A + X in the other |
| B. | 2A + X in both the cells |
| C. | 2A + XXX in both the cells |
| D. | All of the above |
| Answer» B. 2A + X in both the cells | |
| 583. |
Rod shaped elongated sclereids found in the seed coats of pulses are known as [CPMT 1979] |
| A. | Astrosclereids |
| B. | Macrosclereids |
| C. | Trichosclereids |
| D. | Brachysclereids |
| Answer» C. Trichosclereids | |
| 584. |
In an egg laying of 'Bombyx mori', the number of eggs are [Kerala CET 2003; BHU 1999] |
| A. | 200 to 300 |
| B. | 300 to 500 |
| C. | 400 to 600 |
| D. | 500 to 700 |
| Answer» C. 400 to 600 | |
| 585. |
The main difference between bone and cartilage is of: |
| A. | Mineral salts |
| B. | Blood vessels |
| C. | Lymph vessels |
| D. | Haversian canals |
| Answer» E. | |
| 586. |
Smoking addiction is harmful because it produces polycyclic aromatic hydrocarbons, which cause [MP PMT 1999] |
| A. | Reduction in oxygen transport |
| B. | Increase in blood pressure |
| C. | Cancer |
| D. | Retardation of growth of foetus |
| Answer» D. Retardation of growth of foetus | |
| 587. |
Assertion : Sperms of Riccia are biflagellate. Reason : Sperms show swimming nature. |
| 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 | |
| 588. |
Read the assertion and reason carefully: Assertion : Succulents leaves are found in xerophytic habitats. Reason : Succulents leaves store water and have sunken stomata. |
| 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 | |
| 589. |
Carrier of genes of colour blindness are present in [CPMT 1989] |
| A. | Father |
| B. | Mother |
| C. | Father and mother |
| D. | None |
| Answer» C. Father and mother | |
| 590. |
Stolon is |
| A. | Horizontal underground runner |
| B. | Arched runner |
| C. | Both [a] and [b] |
| D. | Both wrong |
| Answer» D. Both wrong | |
| 591. |
The cells or tissues of plants which have lost the power of division are called |
| A. | Permanent tissue |
| B. | Promeristem tissue |
| C. | Protoderm tissue |
| D. | Meristematic tissue |
| Answer» B. Promeristem tissue | |
| 592. |
Grass leaves can fold and unfold because they |
| A. | Have bulliform cells |
| B. | Are long and thin |
| C. | Have parallel venation |
| D. | Are isobilateral |
| Answer» B. Are long and thin | |
| 593. |
Electron microscope has revealed the presence of or Which among the following can be seen only under electron microscope [CPMT 1976, 80, 81; NCERT 1979, 81; AFMC 1996; MP PMT 1998] |
| A. | Ribosome |
| B. | Chromosome |
| C. | Chloroplast |
| D. | Leucoplast |
| Answer» B. Chromosome | |
| 594. |
Seeds are found in: |
| A. | Angiosperm |
| B. | Bryophyte |
| C. | Pteridophyte |
| D. | Algae |
| Answer» B. Bryophyte | |
| 595. |
A gelatinous coating outside the cellulosic cell wall is observed in the members belonging to brown algae. This gelatinous coating is called- |
| A. | Algin |
| B. | Polyalginate |
| C. | Glycoalgin |
| D. | Mannitol |
| Answer» B. Polyalginate | |
| 596. |
The water of Holy Ganga, river is pure due to the presence of [MP PMT 1998] |
| A. | Cyanophages |
| B. | Hydrophytes |
| C. | Bacteria |
| D. | Bacteriophages |
| Answer» E. | |
| 597. |
Spirogyra differs from Mucor in having [CPMT 1994] |
| A. | Uninucleate gametangia |
| B. | Multicellular gametes |
| C. | Anisogamete |
| D. | Sexual reproduction |
| Answer» B. Multicellular gametes | |
| 598. |
'Flower distortion of carrot and onion' is caused by |
| A. | Fungi |
| B. | Mycoplasma |
| C. | Virus |
| D. | None of these |
| Answer» D. None of these | |
| 599. |
Which of the following conversions represents a reduction reaction? |
| A. | Pyruvate \[\to \] Acetyl CoA |
| B. | \[{{C}_{6}}{{H}_{12}}{{O}_{6}}\to 6C{{O}_{2}}\] |
| C. | \[NADH+{{H}^{+}}\to NA{{D}^{+}}2H\] |
| D. | Acetaldehyde \[({{C}_{2}}{{H}_{4}}O)\to Ethanol({{C}_{2}}{{H}_{6}}O)\] |
| Answer» E. | |
| 600. |
Which of the following vitamins possess virucidal properties? |
| A. | A |
| B. | D |
| C. | C |
| D. | E |
| Answer» D. E | |