TRB BT Assistant – Science – English Medium QUIZ 5 Tests × 20 Questions = 100 Questions

TRB BT Assistant – Science – English Medium

MCQ Question Bank – Set 11

5 Tests × 20 Questions = 100 Questions

Correct answers are revealed inside each question after submission.

Test 1 – 20 Questions

Select one answer for each question, then click Submit Test.

1. The process by which a heavy nucleus splits into two or more lighter nuclei is called:

ANuclear fusion BNuclear fission CRadioactive decay DNuclear transmutation

2. What is the primary target of antiviral drugs?

ABacterial cell walls BFungal cell membranes CViral replication processes DProtozoan metabolic pathways

3. The phenomenon of apical dominance, where the terminal bud inhibits the growth of lateral buds, is mainly controlled by which plant hormone?

ACytokinin BGibberellin CAuxin DAbscisic Acid

4. What is the primary function of an electrolyte in an electrochemical cell?

ATo provide electrons BTo conduct ions CTo act as a catalyst DTo absorb heat

5. Which of the following is a method of fish culture?

ANetting BTrapping CCage culture DLonglining

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6. What is the term for a disease that spreads worldwide?

AEpidemic BEndemic CEpizootic DPandemic

7. The rotational equivalent of force is:

AMoment of inertia BAngular momentum CTorque DAngular acceleration

8. Which of the following is a difference between true solutions and colloidal solutions?

ATrue solutions do not show Tyndall effect, while colloidal solutions do. BTrue solutions show Brownian movement, while colloidal solutions do not. CThe dispersed particles in true solutions are larger than those in colloidal solutions. DTrue solutions are always colored, while colloidal solutions are colorless.

9. Which of the following is a consequence of quantum mechanics, not classical physics?

AThe behavior of macroscopic objects BThe quantization of energy and momentum CNewton's laws of motion DThe inverse square law of gravity

10. What is the primary information obtained from an IR spectrum regarding a molecule?

AMolecular weight BPresence of specific functional groups CIsotopic composition DElectronic configuration

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11. Which heavy metal pollutant is commonly found in contaminated fish and can cause neurological damage?

AIron BZinc CMercury DCalcium

12. The Nernst equation is derived from the relationship between Gibbs free energy change and:

ACell potential BConcentration CTemperature DPressure

13. The ability of ultrasonic waves to create microscopic bubbles in a liquid, which then collapse violently, is known as:

ASonoluminescence BCavitation CResonance DDiffraction

14. What is the process by which the early embryo attaches to the uterine wall?

AFertilization BGastrulation CImplantation DNeurulation

15. A molecule that is a polymer of glucose, used for energy storage in animals, is:

ACellulose BChitin CGlycogen DStarch

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16. What is the term for the ability of an animal to mimic the appearance of another, often toxic or dangerous, species?

AMimicry BCamouflage CAposematism DBatesian Mimicry

17. Gay-Lussac's Law relates the pressure and absolute temperature of a gas at constant volume and amount. They are:

AInversely proportional BDirectly proportional CUnrelated DSquarely proportional

18. Which class of dyes is characterized by the presence of a chromophore and an auxochrome, and is applied to fibers in the presence of an acid?

AAcid Dyes BBasic Dyes CDirect Dyes DReactive Dyes

19. The ratio of shear stress to shear strain is called:

AYoung's Modulus BBulk Modulus CModulus of Rigidity DPoisson's Ratio

20. Hydrolysis of salts of strong acid and weak base results in a solution that is:

AAcidic BBasic CNeutral DAmphoteric

Test 2 – 20 Questions

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1. The patterns of branching and arrangement of blood vessels in different vertebrates can be studied to infer:

AConvergent evolution of circulatory efficiency. BHomologous origins and evolutionary modifications. CVestigial circulatory pathways. DAnalogous systems for nutrient transport.

2. Which subatomic particle carries a positive charge?

AElectron BNeutron CProton DPhoton

3. What is resonance?

AThe bending of waves around obstacles BThe superposition of waves leading to increased amplitude CThe phenomenon where an object vibrates with maximum amplitude when subjected to an external periodic force with a frequency matching its natural frequency DThe change in frequency due to relative motion

4. The force between a positive and a negative charge is:

AAttractive BRepulsive CNeither attractive nor repulsive DZero

5. Which of the following is a traditional method of plant breeding?

AGene editing BHybridization CCRISPR-Cas9 DGenetic engineering

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6. Which of the following is a defining characteristic of invertebrates?

APresence of a backbone BExoskeleton made of chitin CThree-chambered heart DEctothermic regulation

7. What is neurulation?

AThe formation of the digestive tract BThe development of the notochord CThe formation of the neural tube, which develops into the central nervous system DThe differentiation of germ layers

8. Anabolic processes are involved in:

ABreaking down complex molecules BBuilding up complex molecules from simpler ones CReleasing energy DExcreting waste

9. Which model of the atom proposed that electrons orbit the nucleus in specific energy levels?

ADalton's Model BThomson's Plum Pudding Model CRutherford's Nuclear Model DBohr's Model

10. What is the term for the phenomenon where substances are taken up by the bulk of another substance?

AAdsorption BAbsorption CDesorption DChemisorption

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11. The 'Battle of the Sexes' in animal behavior often refers to conflicts arising from:

ACompetition for food resources BDiffering parental investment and mating strategies CTerritorial disputes DPredator avoidance behaviors

12. The process of breathing is controlled by a respiratory center located in the:

ACerebrum BCerebellum CMedulla oblongata and pons DSpinal cord

13. Catalysis is often explained in terms of surface chemistry. The catalytic activity of a solid catalyst is due to:

AIts bulk properties BThe presence of free valencies on its surface CIts high density DIts low melting point

14. Which of the following is a test to distinguish between primary, secondary, and tertiary alcohols?

ALucas test BTollens' test CFehling's test DIodoform test

15. Ethnobotany can help in:

ADesigning new aircraft BDeveloping conservation strategies for biodiversity hotspots CPredicting seismic activity DUnderstanding quantum mechanics

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16. The IUCN Red List is an internationally recognized system for documenting and highlighting the conservation status of species. What does 'Endangered' status indicate?

AA species with a very large population BA species at very high risk of extinction in the wild CA species that is no longer found in the wild DA species that is not threatened

17. Which metal forms the alloy 'Bronze' with Tin?

AIron BCopper CNickel DAluminum

18. A planet orbits the Sun. If the planet's orbit is an ellipse, its angular momentum about the Sun is:

AConstant BVarying with distance CZero DMaximum at perihelion

19. What is the main storage carbohydrate in green algae (Chlorophyceae)?

ALaminarin BStarch CFloridean starch DMannitol

20. When a nucleus emits a positron, it is undergoing:

AAlpha decay BBeta-minus decay CBeta-plus decay DGamma decay

Test 3 – 20 Questions

Select one answer for each question, then click Submit Test.

1. What is the approximate energy range of solar energetic particles (SEPs) compared to Galactic Cosmic Rays (GCRs)?

ASEPs have higher energies than GCRs. BSEPs have lower energies than GCRs. CSEPs and GCRs have similar energy ranges. DSEPs are primarily gamma rays, while GCRs are protons.

2. The function of the human ear ossicles (malleus, incus, stapes) is to transmit sound vibrations, but their homologous counterparts in reptiles are part of the jaw structure. This illustrates:

AConvergent evolution leading to similar jaw function. BDivergent evolution where structures change function. CVestigial structures in the reptile jaw. DAnalogous structures in the mammalian ear.

3. Which of these processes involves the transfer of heat through the movement of fluid particles?

AConduction BRadiation CConvection DDiffusion

4. The investigation of plants used for their role in spiritual or religious practices is a significant aspect of:

AEconomic Botany BEthnobotany CPlant Biochemistry DPlant Ecology

5. Nitroalkanes can be prepared by the reaction of alkyl halides with:

ASilver nitrite BSodium nitrite CNitric acid DNitrogen dioxide

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6. Which of the following is an example of an endoparasite?

ALice BTapeworm CFlea DTick

7. What is the term for a reaction that proceeds in a sequence of elementary steps?

AConcerted reaction BStepwise reaction CRadical reaction DPericyclic reaction

8. If a sound source moves away from a stationary observer, the observed frequency will:

AIncrease BDecrease CRemain the same DBecome zero

9. The energy released during respiration is primarily stored in the bonds of which molecule?

AGlucose BCarbon dioxide CATP (Adenosine Triphosphate) DWater

10. Which of the following is a method for preparing colloids?

ACondensation methods BOxidation CReduction DAll of the above

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11. Two objects of equal mass are pushed with forces F1 and F2, respectively. If F1 > F2, which object will have a greater acceleration?

AThe object pushed with F1 BThe object pushed with F2 CBoth will have equal acceleration. DCannot be determined without knowing the mass.

12. What gas is released from the lungs during exhalation?

AOxygen BCarbon dioxide CNitrogen DArgon

13. Which of the following is a characteristic feature of mammals?

ALaying of external eggs BPresence of scales CProduction of milk by mammary glands DFeathers

14. Which element in Group 14 is used in semiconductors?

ACarbon BSilicon CGermanium DTin

15. Parkinson's disease is a neurological disorder characterized by a deficiency in which neurotransmitter?

ASerotonin BDopamine CAcetylcholine DGABA

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16. Which allotrope of carbon is used as a lubricant?

ADiamond BGraphite CBuckminsterfullerene DGraphene

17. What is the 'gene gun' or 'biolistic method' used for?

ATo extract DNA from plants BTo deliver DNA into plant cells by coating particles with DNA CTo sterilize plant tissues DTo measure plant growth

18. The '10% rule' in ecology states that approximately what percentage of energy is transferred from one trophic level to the next?

A50% B25% C10% D5%

19. Who is often referred to as the 'Father of Microbiology' for his groundbreaking work on pasteurization and the germ theory of disease?

ARobert Hooke BAntonie van Leeuwenhoek CLouis Pasteur DAlexander Fleming

20. For a reaction at equilibrium, the Gibbs free energy change (ΔG) is:

APositive BNegative CZero DInfinity

Test 4 – 20 Questions

Select one answer for each question, then click Submit Test.

1. Which salt will produce an acidic solution upon hydrolysis?

ANaCl BCH3COONa CNH4Cl DKCN

2. The relationship between linear acceleration (a) and angular acceleration (α) for a point on a rotating body at radius 'r' is:

Aa = αr Ba = α/r Ca = r/α Da = α^2r

3. What is a segment of DNA that codes for a functional product, usually a protein?

AExon BIntron CGene DPromoter

4. The time taken for half of the radioactive atoms in a sample to decay is known as:

AMean life BDecay constant CHalf-life DActivity

5. Vitamin C is also known as:

ARetinol BAscorbic acid CCalciferol DTocopherol

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6. Absolute zero is the theoretical temperature at which:

AAll molecular motion ceases BWater freezes CGases become liquids DThe volume of an ideal gas becomes zero

7. Which organ produces bile, which aids in digestion and waste removal?

AKidneys BPancreas CLiver DSpleen

8. Which of the following is a characteristic feature of gymnosperms?

AFlowers and fruits BNaked seeds CVascular tissues absent DDominant gametophyte generation

9. The phenomenon where a plant bends towards a light source is known as:

AGravitropism BThigmotropism CPhototropism DNyctinasty

10. The largest terrestrial biome on Earth, characterized by coniferous forests, is the:

ATemperate deciduous forest. BTropical rainforest. CTaiga (Boreal forest). DChaparral.

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11. The moment of inertia of a hollow cylinder (thin walled) of mass M and radius R about its central axis is:

AMR^2 B1/2 MR^2 C2/5 MR^2 D3/2 MR^2

12. Lipids are a diverse group of molecules characterized by their:

ASolubility in water BHydrophobic nature CPresence of peptide bonds DLinear arrangement of monomers

13. What is the term for an animal's internal biological clock that regulates daily cycles of activity?

ACircadian Rhythm BMigration Pattern CFixed Action Pattern DMating Cycle

14. The process of raising bees for honey production is called:

AAquaculture BSericulture CApiculture DViticulture

15. Which type of mechanism is characteristic of the reaction of an alkene with H2O in the presence of an acid catalyst?

ASN1 BSN2 CElectrophilic Addition DNucleophilic Addition

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16. Which element in Group 17 is a liquid at room temperature?

AFluorine BChlorine CBromine DIodine

17. What is the primary goal of crop improvement?

ATo increase the aesthetic appeal of crops BTo develop new ornamental plant varieties CTo enhance desirable traits in crops for better yield and quality DTo study the evolutionary history of cultivated plants

18. Thermodynamic principles, like Ellingham diagrams, are useful in predicting:

AThe rate of a reduction reaction BThe feasibility of a reduction reaction at a given temperature CThe purity of the extracted metal DThe physical properties of the ore

19. Which class within Arthropoda includes insects?

AArachnida BCrustacea CInsecta DMyriapoda

20. Consider a lever. For it to be in rotational equilibrium, the product of force and its distance from the fulcrum (moment) must satisfy:

ASum of clockwise moments = Sum of anticlockwise moments. BSum of clockwise moments > Sum of anticlockwise moments. CSum of clockwise moments < Sum of anticlockwise moments. DNet force = 0.

Test 5 – 20 Questions

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1. A segmented body is a key feature of which phylum?

AMollusca BNematoda CAnnelida DPlatyhelminthes

2. Which of the following is NOT a direct product of photosynthesis?

AGlucose BOxygen CATP DCarbon dioxide

3. What is biodiversity?

AThe number of abiotic factors in an ecosystem. BThe variety of life in a particular habitat or ecosystem. CThe total biomass of an area. DThe rate of energy transfer.

4. A host that is infected with a parasite but does not show any signs of illness is called a(n):

ADefinitive host BIntermediate host CAsymptomatic host DReservoir host

5. Which type of vaccine uses a whole, but weakened, pathogen?

ASubunit vaccine BLive-attenuated vaccine CToxoid vaccine DmRNA vaccine

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6. In which state of matter do particles have a fixed shape and a fixed volume?

ASolid BLiquid CGas DPlasma

7. Which functional group characterizes an amine?

A-OH (hydroxyl) B-COOH (carboxyl) C-NH2 (amino) D-CHO (aldehyde)

8. In a longitudinal wave, the regions of maximum compression and rarefaction correspond to:

ACrests and troughs BPoints of maximum displacement CRegions of high and low pressure DMaximum amplitude

9. Which type of lipid forms the basic structure of cell membranes?

ATriglycerides BSteroids CPhospholipids DWaxes

10. A point charge Q is placed at the origin. The electric flux through a closed surface that encloses the origin is independent of:

AThe magnitude of Q BThe permittivity of free space CThe shape and size of the closed surface DThe position of the charge within the surface

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11. Bioprospecting refers to the exploration of biodiversity for commercially valuable genetic and biochemical resources. What is a key ethical consideration in bioprospecting?

AEnsuring the complete eradication of native species BFair and equitable sharing of benefits derived from these resources CExclusive ownership of all discovered genetic material by corporations DIgnoring the rights of indigenous communities

12. The study of how drugs are absorbed, distributed, metabolized, and excreted by the body is known as:

APharmacodynamics BPharmacokinetics CToxicology DMedicinal Chemistry

13. The property of a material that opposes the formation of electric field lines within it is called:

AConductivity BPermittivity CResistivity DPermeability

14. The exchange of gases between blood and body tissues occurs in:

APulmonary capillaries BSystemic capillaries CArteries DVeins

15. What is the term for a species that readily donates a pair of electrons?

AElectrophile BCarbocation CNucleophile DFree Radical

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16. What is the term for the substance produced by a host plant to defend itself against a pathogen?

AToxin BEnzyme CPhytoalexin DHormone

17. The skeletal structure of a bird's wing, a bat's wing, and a human arm, despite different functions, show similarities in bone arrangement. This is a classic example of:

AAnalogous structures BHomologous structures CVestigial structures DConvergent evolution

18. The phenomenon where individuals of a species cooperate to achieve a common goal, such as hunting large prey, is an example of:

ASolitary behavior BAltruism CCooperative behavior DTerritorial defense

19. In nuclear reactions, the total number of nucleons (protons + neutrons) is:

AAlways conserved BNot conserved CSometimes conserved DConserved only in fusion reactions

20. What is the common name for the alcohol 2-propanol?

AEthanol BMethanol CIsopropyl alcohol Dn-Propanol

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