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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.
| 10851. |
Read the assertion and reason carefully to mark the correct option out of the options given below: Assertion : Alcohol along with other stimulants or narcotic drugs is extremely harmful. Reason : Alcohol damages only digestive system. |
| 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» D. If the assertion and reason both are false. | |
| 10852. |
Highest concentration of auxins exist in [CBSE PMT 1990; MP PMT 2000] |
| A. | At the base of various plant organs |
| B. | Growing tip of plants |
| C. | In leaves |
| D. | In xylem and phloem cells only |
| Answer» C. In leaves | |
| 10853. |
Read the assertion and reason carefully: Assertion : Citrus is a palmate compound leaf. Reason : Citrus has single functional leaflet. |
| 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 | |
| 10854. |
Which of the following effects of auxins on plants is the basis for commercial application [CPMT 1985] |
| A. | Callus formation |
| B. | Curvature of stem |
| C. | Induction of root formation in stem cuttings |
| D. | All of the above |
| Answer» E. | |
| 10855. |
Assertion : Some bacteria have the capacity to retain Gram stain after treatment with acid alcohol. Reason : They are known as Gram positive as they are attracted towards positive pole under influence of electric current. |
| 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 | |
| 10856. |
Micro-organism used in the production of yoghurt is |
| A. | Salmonella sp. |
| B. | Lactobacillus bulgaricus |
| C. | Streptococcus thermophillus |
| D. | Both b and c |
| Answer» E. | |
| 10857. |
Assertion : Genetic RNA acts as a hereditary material. Reason : Genetic RNA replicates directly. |
| 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 | |
| 10858. |
Waxy substance secreted by epidermal cells on their outer walls is |
| A. | Cutin |
| B. | Lignin |
| C. | Pectin |
| D. | Cellulose |
| Answer» B. Lignin | |
| 10859. |
The types of fibres found in connective tissues are [DPMT 1993] |
| A. | Collagan fibres |
| B. | Elastic fibres |
| C. | Reticular fibres |
| D. | All of the above |
| Answer» E. | |
| 10860. |
Algae which form motile colony is [Orissa JEE 2005] |
| A. | Volvax |
| B. | Nostoc |
| C. | Spirogyra |
| D. | Chlamydomonas |
| Answer» B. Nostoc | |
| 10861. |
Which of the following is a limbless amphibian [DPMT 1985; MP PMT 1993, 2002; Kerala CET 2002] |
| A. | Salamander |
| B. | Ichthyophis |
| C. | Amphioxus |
| D. | Balanoglossus |
| Answer» C. Amphioxus | |
| 10862. |
Organic forming does not include [Wardha 2003] |
| A. | Green manures |
| B. | Chemical fertilizer |
| C. | Crop rotation |
| D. | Compost and farmyard manures |
| Answer» C. Crop rotation | |
| 10863. |
Biogeochemcial cycles are of |
| A. | Two types |
| B. | Three types |
| C. | Four types |
| D. | Five types |
| Answer» B. Three types | |
| 10864. |
Assertion : The interval between pollination and fertilization is about 4 months in Cycas. Reason : Cycas show retention of swimming sperm. |
| 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 | |
| 10865. |
Assertion : Enzymes lower the activation energy. Reason : A substrate molecule can be acted upon by a particular enzyme. |
| 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 | |
| 10866. |
At a time, a lioness usually gives birth to |
| A. | One cub |
| B. | Two cubs |
| C. | Three cubs |
| D. | Four cubs |
| Answer» C. Three cubs | |
| 10867. |
Wheat and rice belong to family [MHCET 2000] |
| A. | Poaceae |
| B. | Rutaceae |
| C. | Cyperaceae |
| D. | Compositae |
| Answer» B. Rutaceae | |
| 10868. |
Meiosis was discovered by [Bihar MDAT 1994] |
| A. | Sutton |
| B. | Hofmeister |
| C. | Strasburger |
| D. | Amici |
| Answer» D. Amici | |
| 10869. |
Each peripheral fibril on the centriole is made up of |
| A. | 1 microtubule |
| B. | 2 microtubule |
| C. | 3 microtubule |
| D. | 4 microtubule |
| Answer» D. 4 microtubule | |
| 10870. |
Bone marrow does not occur in [BHU 1994] |
| A. | Fishes |
| B. | Amphibians |
| C. | Birds |
| D. | Reptiles |
| Answer» D. Reptiles | |
| 10871. |
Which one is connected with conservation of forests [DPMT 1987] |
| A. | Gir |
| B. | Silent Valley |
| C. | Kaziranga |
| D. | Bharatpur |
| Answer» C. Kaziranga | |
| 10872. |
Read the assertion and reason carefully: Assertion : China rose and rose both bear stipules. Reason : They are of adnate types. |
| 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 | |
| 10873. |
Assertion : Heterochromatin is genetically inactive. Reason : It lacks 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» D. If both the assertion and reason are false | |
| 10874. |
Arrangement of chromosomes in the order of decreasing length is termed [Manipal 2005] |
| A. | Pedigree |
| B. | Eugenetics |
| C. | Idiogram |
| D. | Dysengenics |
| Answer» D. Dysengenics | |
| 10875. |
Which of the following movements is not related to change in auxin levels [CBSE PMT 1990] |
| A. | Nyctinastic leaf movement |
| B. | Movement of roots towards soil |
| C. | Movement of sunflower tracking the direction of the sun |
| D. | Movement of shoot towards light |
| Answer» B. Movement of roots towards soil | |
| 10876. |
Why is vivipary an undesirable character for annual crop plants [CBSE PMT 2005] |
| A. | It reduces the vigour of the plant |
| B. | The seeds cannot be stored under normal conditions for the next season |
| C. | The seeds exhibit long dormancy |
| D. | It adversely affects the fertility of the plant |
| Answer» C. The seeds exhibit long dormancy | |
| 10877. |
The conc. of pesticide require to destroy 50% of pest is called [MP PMT 1993] |
| A. | LD 50 |
| B. | LC 50 |
| C. | LB 50 |
| D. | LE 50 |
| Answer» B. LC 50 | |
| 10878. |
The spread of cancerous cells to distant sites is termed as [MP PMT 1997] |
| A. | Mutation |
| B. | Malignancy |
| C. | Metastasis |
| D. | Benign tumours |
| Answer» D. Benign tumours | |
| 10879. |
The most important human activity leading to the extinction of wildlife is [CBSE PMT 1994] |
| A. | Alteration and destruction of the natural habitats |
| B. | Hunting for commercially valuable wild life products |
| C. | Pollution of air and water |
| D. | Introduction of alien species |
| Answer» B. Hunting for commercially valuable wild life products | |
| 10880. |
Science which links heredity with environments is [MP PMT 2004] |
| A. | Genetics |
| B. | Gene ecology |
| C. | Ecology |
| D. | Ecophysiology |
| Answer» C. Ecology | |
| 10881. |
Double Vagina are found in [RPMT 1999] |
| A. | Monotremata |
| B. | Eutheria |
| C. | Marsupials |
| D. | All of the above |
| Answer» D. All of the above | |
| 10882. |
PV18 wheat variety has which qualities |
| A. | Red grains |
| B. | Less protein contents |
| C. | Grains are less nutritive |
| D. | All the above characters |
| Answer» E. | |
| 10883. |
The benefits of honey bees are |
| A. | Honey and pollination of flowers only |
| B. | Honey and wax only |
| C. | Wax and pollination of flowers only |
| D. | Honey, wax and pollination of flowers |
| Answer» E. | |
| 10884. |
'Sea lion' belongs to [BHU 1989] |
| A. | Class Reptilia |
| B. | Subcless Prototheria |
| C. | Superclass Pisces |
| D. | Order Carnivora |
| Answer» E. | |
| 10885. |
Carbon is available to crop plants in the form of |
| A. | Amino acids |
| B. | Carbon dioxide |
| C. | Elemental carbon |
| D. | Carbonates |
| Answer» E. | |
| 10886. |
Desert biome does not support much vegetation as it lacks [Haryana PMT 1994] |
| A. | Sufficient light |
| B. | Favourable temperature |
| C. | Sufficient water |
| D. | Sufficient nutrients |
| Answer» D. Sufficient nutrients | |
| 10887. |
First land inhabiting plants are [CBSE PMT 1993; MP PMT 2004] |
| A. | Angiosperms |
| B. | Gymnosperms |
| C. | Bryophytes |
| D. | Pteridophytes |
| Answer» D. Pteridophytes | |
| 10888. |
Which theory holds that accumulation of specific waste products causes ageing |
| A. | Waste product theory |
| B. | Metabolic theory |
| C. | Immunity theory |
| D. | All of these |
| Answer» B. Metabolic theory | |
| 10889. |
Assertion : There is no vaccination for malaria. Reason : Plasmodium causes malaria. |
| 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 | |
| 10890. |
What is bran |
| A. | Predominantly starch |
| B. | Predominantly proteins |
| C. | Predominantly lipids |
| D. | Predominantly minerals |
| Answer» C. Predominantly lipids | |
| 10891. |
Assertion : Antheridia of Funaria are sunk in pit. Reason : Its antheridial cluster is surrounded by perigonial leaves. |
| 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. | |
| 10892. |
Biofertilizers include [CBSE PMT 1997, 2001] |
| A. | Cowdung manure and farmyard waste |
| B. | A quick growing crop ploughed back |
| C. | BGA/Anabaena and Azolla |
| D. | All the above |
| Answer» D. All the above | |
| 10893. |
In mitotic cell division |
| A. | Number of chromosomes is doubled at the end |
| B. | Number of chromosomes is reduced to half |
| C. | Number of chromosomes remain unchanged |
| D. | There is no division of chromosomes |
| Answer» D. There is no division of chromosomes | |
| 10894. |
Cinnamon is obtained from [DPMT 1978; BHU 1987] |
| A. | Cinnamomum zeylanicum |
| B. | Eugenia caryophyllata |
| C. | Coriandrum sativum |
| D. | Capsicum annum |
| Answer» B. Eugenia caryophyllata | |
| 10895. |
One gene one enzyme concept means [CPMT 1995] |
| A. | One gene controls one enzyme |
| B. | All the enzymes are controlled by genes |
| C. | All the genes are controlled by enzymes |
| D. | None of these |
| Answer» B. All the enzymes are controlled by genes | |
| 10896. |
Cledoic egg is an adaptation to [RPMT 2001] |
| A. | Aquatic life |
| B. | Marine life |
| C. | Terrestrial life |
| D. | Aerial life |
| Answer» D. Aerial life | |
| 10897. |
The enzyme responsible for atmospheric nitrogen fixation is [CPMT 1990; AIIMS 2000; CBSE PMT 2001] |
| A. | Nitrogenase |
| B. | Hydrogenase |
| C. | Oxygenase |
| D. | Carboxylase |
| Answer» B. Hydrogenase | |
| 10898. |
Telolecithal eggs have [Bihar MDAT 1995; MH CET 2004] |
| A. | Equal distribution of yolk |
| B. | Average amount of yolk |
| C. | Yolk present at a distance from nucleus |
| D. | No yolk |
| E. | All the above |
| Answer» D. No yolk | |
| 10899. |
Another substance of the category of glucose, sucrose and maltose is: |
| A. | starch |
| B. | fatty acid |
| C. | amino acid |
| D. | haemoglobin |
| Answer» B. fatty acid | |
| 10900. |
In pachytene stage of meiosis the chromosomes appear [BHU 2002] |
| A. | Single stranded |
| B. | Double stranded |
| C. | Three stranded |
| D. | Four stranded |
| Answer» E. | |