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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.
| 12901. |
Adipocytes are mainly found in [MP PMT 1997] |
| A. | Bones |
| B. | Cartilages |
| C. | Connective tissue |
| D. | Nerves |
| Answer» D. Nerves | |
| 12902. |
Flightless birds belong to [CBSE PMT 2002] |
| A. | Ratites |
| B. | Neornithes |
| C. | Archaeornithes |
| D. | None of these |
| Answer» B. Neornithes | |
| 12903. |
Corn is immersed in the boiling water. It is then cooled, the solution becomes sweet. It is due to [AFMC 1999; JIPMER 2001] |
| A. | Enzymes are inactivated in boiling water |
| B. | Disaccharides are converted to monosaccharides |
| C. | Monosaccharides are converted to disaccharides |
| D. | None of these |
| Answer» C. Monosaccharides are converted to disaccharides | |
| 12904. |
Rapid healing of wounds is found in |
| A. | Epithelial tissue |
| B. | Muscular tissue |
| C. | Connective tissue |
| D. | Nervous tissue |
| Answer» B. Muscular tissue | |
| 12905. |
Read the assertion and reason carefully: Assertion : Unisexual flowers have separate male and female flowers. Reason : Both monoecious or dioecious plants have unisexual flowers. |
| 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 | |
| 12906. |
Which of the following is a Rabi cereal |
| A. | Bajra |
| B. | Jawar |
| C. | Wheat |
| D. | All the above |
| Answer» D. All the above | |
| 12907. |
The size of most of the cells is best expressed in [CPMT 1983, 87, 98] |
| A. | Å |
| B. | Milimeters (mm) |
| C. | Nanometers (nm) |
| D. | Micrometers (mm) |
| Answer» E. | |
| 12908. |
Each couple should produce only two children which will help in [MP PMT 1994; AMU 1998] |
| A. | Checking pollution |
| B. | Stabilizing the ecosystem |
| C. | Fertility of soil |
| D. | Improving food web |
| Answer» C. Fertility of soil | |
| 12909. |
Important plant part is small sized grain in |
| A. | Sorghum vulgare |
| B. | Avena sativa |
| C. | Hordeum vulgare |
| D. | Zea mays |
| Answer» B. Avena sativa | |
| 12910. |
Sex organs of thallophytes are generally |
| A. | Unicellular |
| B. | Multicellular surrounded by a sterile jacket |
| C. | Multicellular but not surrounded by any jacket |
| D. | Unicellular with a sterile jacket |
| Answer» B. Multicellular surrounded by a sterile jacket | |
| 12911. |
The chemical present in flit (finit) is |
| A. | Malathion |
| B. | DDT |
| C. | BHC |
| D. | Aldicarb |
| Answer» B. DDT | |
| 12912. |
The incorrectly matched pair is |
| A. | Biogas produced from dung |
| B. | Latex source of liquid hydrocarbons |
| C. | Ethanol used as gasoline |
| D. | Animal energy used most efficiently |
| Answer» E. | |
| 12913. |
Non-renewable substance or resource is [RPMT 1992] |
| A. | Planktons and fishes |
| B. | Fossils and minerals |
| C. | Animals and plants |
| D. | Animals and minerals |
| Answer» C. Animals and plants | |
| 12914. |
Function of centriole is [BHU 1980; CPMT 1996; Kerala CET 2002; MP PMT 2003; J & K CET 2005] |
| A. | Formation of spindle fibres |
| B. | Formation of nucleolus |
| C. | Initiation of cell division |
| D. | Formation of cell plate |
| Answer» B. Formation of nucleolus | |
| 12915. |
Bordeaux mixture was first used in: |
| A. | Germany |
| B. | Japan |
| C. | France |
| D. | USA |
| Answer» D. USA | |
| 12916. |
The common name of necturus is [CBSE PMT 1988] |
| A. | Cave salamander |
| B. | Congo eel |
| C. | Hell bender |
| D. | Mud puppy |
| Answer» E. | |
| 12917. |
During the first metaphase of meiosis the centromeres [MP PMT 1994] |
| A. | Undergo division |
| B. | Do not divide |
| C. | Divide but do not separate |
| D. | Are not identical |
| Answer» C. Divide but do not separate | |
| 12918. |
T. Schwann and M. Schleiden were [CPMT 2001; BHU 2001] |
| A. | Dutch biologists |
| B. | English biologists |
| C. | Austrian biologists |
| D. | German biologists |
| Answer» E. | |
| 12919. |
The best milch breed in the world is [KCET 2001] |
| A. | Chittagong |
| B. | Deoni |
| C. | Holstein - Friesian |
| D. | Sindhi |
| Answer» D. Sindhi | |
| 12920. |
Assertion : Casting of covering occurs in Palaemon. Reason : Casting helps in excretion. |
| 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 | |
| 12921. |
In hilly areas, erosion is minimised by [BHU 1999] |
| A. | Terracing |
| B. | Manuring |
| C. | Ploughing |
| D. | Mixed cropping |
| Answer» B. Manuring | |
| 12922. |
A metastatic cancerous tumour is termed ?sarcoma ' if the disorder is in [CBSE PMT 1994] |
| A. | Immune system |
| B. | Epithelial cells |
| C. | Fibroblasts |
| D. | Circulatory system |
| Answer» D. Circulatory system | |
| 12923. |
American water plant that has become a troublesome water weed in India is [MP PMT 1989; CBSE PMT 1993; AFMC 2000] |
| A. | Cyperus rotundus |
| B. | Eichhornia crassipes |
| C. | Trapa latifolia |
| D. | Trapa bispinosa |
| Answer» C. Trapa latifolia | |
| 12924. |
Which insect was used to check the spread of cacti |
| A. | Coleus eurythaeum |
| B. | Cactoblastis cactorum |
| C. | Neodipreon certifer |
| D. | None of these |
| Answer» C. Neodipreon certifer | |
| 12925. |
Assertion : Rhizopus and Mucor are used in liquor industry. Reason : They cause fermentation. |
| 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 | |
| 12926. |
At what phase of meiosis are there two cells, each with sister chromatids aligned at the spindle equator [Pune CET 1998; BHU 1999] |
| A. | Anaphase II |
| B. | Metaphase II |
| C. | Metaphase I |
| D. | Anaphase I |
| Answer» C. Metaphase I | |
| 12927. |
Simplest form of carbohydrate is |
| A. | Carbon |
| B. | Starch |
| C. | Monosaccharide |
| D. | Canesugar |
| Answer» D. Canesugar | |
| 12928. |
\[{{G}_{0}}\]state of cells in eukaryotic cell cycle denotes [AIEEE 2003] |
| A. | Check point before entering the next phase |
| B. | Pausing in the middle of a cycle to cope with a temporary delay |
| C. | Death of a cell |
| D. | Exit of cells from cell cycle |
| Answer» E. | |
| 12929. |
Match the following columns. Column-I Column-II A. Relay Pump Theory I. Stocking B. Transpiration Cohesion II. Sir J. C. Bose C. Mass Flow Theory III. Godlewski D. Pulsation Theory IV. Dixon and Jolly E. V. Ernst Munch |
| A. | A-III; B-II; C-V; D-I |
| B. | A-II; B-I; C-V; D-III |
| C. | A-III; B-IV; C-V; D-II |
| D. | A-IV; B-III; C-I; D-II |
| Answer» D. A-IV; B-III; C-I; D-II | |
| 12930. |
Identify the correct relationship with reference to water potential of a plant cell? |
| A. | \[{{\psi }_{w}}={{\psi }_{m}}-({{\psi }_{s}}+{{\psi }_{p}})\] |
| B. | \[{{\psi }_{w}}={{\psi }_{m}}-{{\psi }_{s}}-{{\psi }_{p}}\] |
| C. | \[{{\psi }_{w}}={{\psi }_{m}}+{{\psi }_{s}}+{{\psi }_{p}}\] |
| D. | \[{{\psi }_{w}}={{\psi }_{m}}+({{\psi }_{s}}-{{\psi }_{p}})\] |
| Answer» D. \[{{\psi }_{w}}={{\psi }_{m}}+({{\psi }_{s}}-{{\psi }_{p}})\] | |
| 12931. |
Ringing experiment is related with: |
| A. | Ascent of sap |
| B. | Translocationoffood |
| C. | Both [a] and [b] |
| D. | Mineral nutrition |
| Answer» D. Mineral nutrition | |
| 12932. |
The potential energy of water is referred as: |
| A. | Water potential |
| B. | Osmotic potential |
| C. | Gravity potential |
| D. | Pressure potential. |
| Answer» B. Osmotic potential | |
| 12933. |
A plant cell placed in pure water will: |
| A. | Expand until the osmotic potential or solute potential reaches that of water. |
| B. | Becomes more turgid until the pressure potential of cell reaches its osmotic potential. |
| C. | Become more turgid until the osmotic potential reaches that of pure water. |
| D. | Becomes less turgid until the osmotic potential reaches that of pure water. |
| Answer» C. Become more turgid until the osmotic potential reaches that of pure water. | |
| 12934. |
Read the following statements regarding porins and select the correct option given below. (i) Porins are transport proteins. (ii) Channel proteins are usually gated and are a type of transport protein. (iii) Carrier protein binds the particular solute to be transported. (iv) Particular solute is delivered to the other side of the membrane by carrier proteins. |
| A. | (i),(ii) and (iii) |
| B. | (i),(iii) and (iv) |
| C. | (i),(ii),(iii)and(iv) |
| D. | (i) and (iv) |
| Answer» D. (i) and (iv) | |
| 12935. |
The translocation of organic solutes in sieve tube members is supported by: |
| A. | P-proteins. |
| B. | Mass flow involving a carrier and ATP. |
| C. | Cytoplasmic streaming. |
| D. | It is translocated in the form of sugar from leaves |
| Answer» B. Mass flow involving a carrier and ATP. | |
| 12936. |
Which of the following is incorrect for the carrier molecules involved in facilitated diffusion? |
| A. | They increase the speed of transport across a membrane. |
| B. | They concentrate solute molecules on one side of the membrane. |
| C. | They have specific binding sites for molecules they transport. |
| D. | They may undergo conformational change upon binding of solutes. |
| Answer» C. They have specific binding sites for molecules they transport. | |
| 12937. |
Active absorption of water by roots from the soil is mainly affected by: |
| A. | Tension in cell sap due to transpiration |
| B. | Osmotic concentration of cell sap |
| C. | Hydrophobic nature of root hair |
| D. | Typical tissue organisation |
| Answer» C. Hydrophobic nature of root hair | |
| 12938. |
Mesophyll tissue of leaf is at water potential of -10.0 bars while epidermal cells of leaf have water potential of-8.0 bars and the air outside has water potential of -5.0 bars. Water will move from: |
| A. | Air \[\to \] epidermis \[\to \] mesophyll |
| B. | Mesophyll \[\to \] air \[\to \] epidermis |
| C. | Mesophyll \[\to \] epidermis \[\to \] air |
| D. | Water will not move. |
| Answer» B. Mesophyll \[\to \] air \[\to \] epidermis | |
| 12939. |
Water is lost in liquid state in some plants through hydathodes. These hydathodes: |
| A. | Always remain open. |
| B. | Do not show any specificity in opening and closing. |
| C. | Remain closed at night. |
| D. | Remain closed during day. |
| Answer» B. Do not show any specificity in opening and closing. | |
| 12940. |
Which of the following statements is/are incorrect? (i) In CAM plants, stomata open during dark and remain closed during the day. (ii) Role of \[N{{a}^{+}}\] in stomatal opening is now universally accepted. (iii) The water potential of root cells is higher than the water potential of soil. (iv) Capillarity theory is the most accepted theory of water movement through plants. (v) The walls of xylem vessels made up of lignocellulose have strong affinity for water molecules. |
| A. | (ii), (iii) and (v) only |
| B. | (ii), (iii) and (iv) only |
| C. | (i), (ii) and (iii) only |
| D. | (ii) and (iii) only |
| Answer» C. (i), (ii) and (iii) only | |
| 12941. |
The living steady state has a self-regulatory mechanimsm which is |
| A. | Feedback mechanism |
| B. | Homeotherms |
| C. | Homozygous |
| D. | Heterozygous |
| Answer» E. | |
| 12942. |
The jawless vertebrate is [Kerala PMT 2004] |
| A. | Crocodile |
| B. | Loris |
| C. | Hyla |
| D. | Fox |
| Answer» E. | |
| 12943. |
The digestive enzyme that is not found in human pancreatic juice is: (Kerala PMT 2006) |
| A. | lipase |
| B. | trypsin |
| C. | amylase |
| D. | nuclease |
| Answer» E. | |
| 12944. |
Who invented the "electron microscope'' [AFMC 2001; BVP 2002; Haryana PMT 2005] |
| A. | Knoll and Ruska |
| B. | Robert Brown |
| C. | Correns |
| D. | Janssen and Janssen |
| Answer» B. Robert Brown | |
| 12945. |
Scientists were able to pinpoint the location of colour processing centres in the visual cortex of the brain by means of [Kerala PMT 2005] |
| A. | PET |
| B. | NMR |
| C. | CT |
| D. | X- ray |
| Answer» B. NMR | |
| 12946. |
In confocal microscope, the specimen is illuminated by [Orissa JEE 2004] |
| A. | UV ray |
| B. | Laser beam |
| C. | Electron flow |
| D. | None of these |
| Answer» C. Electron flow | |
| 12947. |
Tracer elements are [MP PMT 2002] |
| A. | Radioisotopes |
| B. | Vitamins |
| C. | Microelements |
| D. | Macroelements |
| Answer» B. Vitamins | |
| 12948. |
An angstrom is equal to |
| A. | \[{{10}^{-10}}m\] |
| B. | \[{{10}^{-9}}m\] |
| C. | \[{{10}^{-8}}m\] |
| D. | \[{{10}^{-5}}m\] |
| Answer» B. \[{{10}^{-9}}m\] | |
| 12949. |
Satellite virus is a |
| A. | Independent virus |
| B. | Associated with an activator virus |
| C. | Both (a) and (b) |
| D. | None of these |
| Answer» C. Both (a) and (b) | |
| 12950. |
The virus responsible for lysogenic growth cycle is |
| A. | Cyanophage |
| B. | T2 phage |
| C. | l phage |
| D. | All the above |
| Answer» D. All the above | |