UHS MDCAT Past Paper 2023

UHS MDCAT Past Paper 2023 MCQs for Punjab medical and dental colleges admission test preparation online.

UHS MDCAT Past Paper 2023 MCQs

The pen is expensive; still I _____ it.

• Have bought
• Buyed
• Will buy
• Bought

We just _____ a game of tennis

• Had
• Have
• Has
• Have had

____ methods don’t work. Choose the correct option:

• That
• The
• This
• These

A carpenter carves _____ on cab doors. Choose the right word to fill in the blank.

• Ornate
• Arabesque
• Decked
• Floral

 Choose the similar meaning of the bracketed word. (Providentially), his mind was not injured

• Slowly
• Steadily
• Luckily
• Really

At last the fly was _____ . The most appropriate word to be filled in is:

• Trapped by the spider
• Invited by the spider
• Entertained by the spider
• Spared by the spider

A shoal of fish _____ killed by the fishermen.

• Had
• Have
• Has been
• Has

 A few years ago, it _____ that human beings do not belong to this earth

• Were found
• Had found
• Was found
• Found

We felt as if the ground was _____ beneath our feet.

• Digging
• Slipping
• Sinking
• Bursting

Choose the sentence that is grammatically correct:

• He weighed two maunds
• He weighed themselves two maunds
• He weighed himself two maunds
• He weighed itself two maunds

0ne degree is equal to:

• Π/270 radians
• Π/360 radians
• Π/90 radians
• Π/180 radians

The circular line has a fix distance from _____ .

• A fix point
• A point from outside
• Any point
• A point on a circle

In the displacement-time graph, if the slope is constant then the velocity is

• May be variable or constant
• Infinite
• Variable
• Constant

One radian is analogous to:

• 57°18″
• 57°3
• 57°3″
• 57°18′

A man is in a car that is moving with the velocity of 36km/hr. His speed with respect to the car is:

• 10 m/s
• Infinite
• Zero
• 36 m/s

The relation between gray and rad is given as: 1 Gy = rad

• 0.01
• 100
• 10
• 0.001

The decay rate of radioactive substance is:

• Constant with time
• Decreases exponentially with time
• Varies inversely with time
• Decreases linearly with time

The SI unit of equivalent dose is:

• Mass
• Sievert
• Gray
• Rad

In Compton effect, a photon of a certain wavelength collides with a stationary electron. The wavelength of the emitted photon is:

• Same
• Longer
• Infinite
• Shorter

The process of ejection of loosely bound electrons from a certain photo sensitive surface by absorption of photon is called:

• Compton effect
• Pair production
• Photoelectric effect
• Black body radiation

For the positive half cycle i.e., 0 → T/ 2, the diode D:

• Shows maximum resistance
• Behaves as open
• Is forward biased
• Is reverse biased

The expression for the emf produced by A.C generator is

• NωAB CosΘ
• ILB CosΘ
• NωAB
• NωAB SinΘ

Working principal of magnetic levitation train is according to

• Lenz law
• Max planks law
• Faraday law
• Ohm law

The quantity Δφ/Δt has the same units as that of

• Current
• Emf
• Charge
• Magnetic induction

The induced emf produced in the coil is sometimes called as:

• Back emf
• Mutual inductance
• Self-inductance
• Motional emf

 Velocity selector will select only those charge particles whose velocity is given by:

• V=ExB
• V=0
• V=B/E
• V=E/B

According to maximum power transfer theorem, which of the following is the max power delivered by the battery to the output

• E^2/2r
• E^2/4r
• E^2/3r
• E^2/5r

Which of the following the fractional change in resistance per kelvin

• Conductivity
• Temperature coefficient of resistance
• Resistivity
• Temperature coefficient of resistivity

Which of the following is the longest wavelength of radiation for the Paschen series

• 187000000 m
• 0.00000187 m
• 0.00000187/ m
• 187000000/ m

In Compton effect, the incident photon when compared to the scattered photon is of:

• Equal energy
• Greater frequency
• Greater energy
• Greater energy and momentum

In principle, the transformer consists of two coils of copper, electrically insulated from each other, wound on the same

• Gold core
• Copper core
• Iron core
• Steel core

 The ohmmeter of a portable digital multi meter need:

• Ammeter
• Voltmeter
• Internal battery
• Wet cell

First law of thermodynamics concerns with the conservation of

• Energy
• Work
• Heat
• Momentum

Wave trough refers to the:

• Lowest point of the wave
• Highest point of the wave
• Wave length
• Wave speed

When a wave goes from one medium to another, there is a no change in the:

• Frequency
• Amplitude
• Wavelength
• Velocity

If transverse waves are passing through medium, then particle of medium:

• Remain stationary
• Move toward
• Move away
• Move In Simple Harmonic Motion

The speed of sound in an ideal gas depends upon:

• Frequency and fog
• Temperature and density
• Temperature and amplitude
• Density and amplitude

For an ideal gas equation PV= nRT, the dimensions of Real Gas Constant R are:

• [ M1 L-3 T-2 K-1 ]
• [ M1 L-2 T-1 K-1 ]
• [ M1 L-3 T-1 K-1 ]
• [ M1 L2 T-2 K-1 ]

Electric field intensity inside a hollow charged sphere is:

• Negative
• Positive
• Maximum
• Zero

Gauss law cannot be used to find which of the following quantity

• Electric field intensity
• Charge
• Electric flux density
• Permittivity

To store the electric charge the ultra-capacitors use _____ effect

• Quadruple layer
• Single layer
• Triple layer
• Double layer

A capacitor of capacitance ‘C’ has a charge ‘Q’ and stored energy is ‘w’. If the charge is increased to ‘2Q’. The stored energy will be:

• W/2
• W/4
• 2W
• 4W

The resistance of the wire varies inversely as:

• Temperature
• Length
• Area of cross section
• Resistivity

What is the molecular formula of pyridine molecule

• C6H6N
• C5H5N
• C5H5NH
• C6H5N

Which of the functional group are present in ethyl acetate

• Ester group
• Aldehyde group
• Ether group
• Carboxyl group

Which of the following is correct electronic configuration of iron (II) ion (atomic no. of Fe is = 26 )

• [ Ar ] 4s2, 3d6
• [ Ar ] 4s0, 3d6
• [ Ar ] 4s2, 3d5
• [ Ar ] 4s2, 3d4

Which one of them is amphoteric in nature

• Potassium oxide
• Lithium oxide
• Beryllium oxide
• Calcium oxide

The electronic configurations of some elements are given below. Recognize the element that belongs to group IIIA

• 1s2 2s2 2p4
• 1s2 2s2 2p3
• 1s2 2s2 2p1
• 1s2 2s2 2p2

Which of the following has the highest atomic radius in its period

• Alkaline earth metals
• Halogens
• Chalcogens
• Alkali metals

Select the metal which is extracted from bauxite

• Ca
• Mg
• Cu
• Al

Oxidation number of free magnesium is

• +3
• +2
• 0
• +1

What are vinyl alcohol and acetaldehyde

• Metamers
• Position isomers
• Tautomer’s
• Chain isomers

The bond energy of hydrogen in H2 molecule is:

• 436 KJ/mol
• 242 KJ/mol
• 431 KJ/mol
• 446 KJ/mol

0ne can estimate the direction in which equilibrium will shift with the help of:

• Law of mass action
• Law of heat of formation
• Le chaltier’s principle
• Mess’s law

Complete oxidation of alcohol gives which of the following

• Carboxylic acid
• Ketone
• Aldehyde
• Alkane

Dehydration of alcohol gives which of the following product in the presence of H2SO4 at 140 C

• Ethyl chloride
• Diethyl ether
• Acetaldehyde
• Ethyl acetate

After the digestion & before absorption the product of the protein is:

• Only ammonia
• Only small polypeptide
• Only Amino Acid
• Amino Acid and small polypeptide

Mr. Khan mix acetic acid with thionyl chloride. Which product is obtained

• CH3COOCH3 + SO2
• CH3Cl + SO2 + HCl
• CH3Cl + CH3COCl
• CH3COCI + SO2 + HCI

Acetic acid is weak acid than sulphuric acid because of which of the following reasons

• It has more Inductive effect
• It has -COOH group
• It decomposes on increasing temperature
• It has less degree of Ionization

If carboxylic acid and ketone groups C=0 are present in a chain then final name will be give as

• Both Oxo and One
• one, oic acid
• None of them
• oxo, oic acid

When 2-bromopropane reacts with Sodium ethoxide, the major product is/are

• Propene
• Propane
• All are formed
• Ethyl isopropyl ether

Which oxyacid of halogen is strong oxidizing agent

• HClO3
• HClO2
• HClO4
• HClO

Why fluorine has less electron affinity as compared to bromine

• Thick small electronic cloud
• Higher ionization energy
• Electronegativity
• Seven electrons in outermost shell

In anisotropic crystals which property do not change with the change in direction of crystalline structure

• Molar mass
• Thermal conductance
• Refractive Index
• Electrical conductance

Which type of forces exist between iodine molecules

• Dipole-dipole forces
• Dipole-induced dipole forces
• Non-polar forces
• Instantaneous dipole-induced dipole forces

Which is not a property of liquid

• Melting
• Diffusion
• Osmotic pressure
• Freezing point

The same moles of H2, N2 and 02 are present in 0.1 cc volume at STP. Which one has greatest number of molecules:

• Number of molecules are equal
• N2
• O2
• H2

Which of the following electronic configuration is correct for 24^Cr

• 1s²2s²2p⁶3s²3p⁶4s¹3d⁵
• 1s2,2s2,2p6,3s2,3p6,4f6
• 1s2,2s2,2p6,3s2,3p6,4s2,3d4
• 1s2,2s2,2p6,3s2,3p6,3d6

The average weight of atoms of an element compared to the weight of one atom of _____ is called atomic weight

• Carbon
• Nitrogen
• Hydrogen
• Helium

Which element is used as standard to determine atomic mass of an element

• C
• P
• H
• Cl

A compound of phosphorus oxide has 43.60% of Oxygen. Its empirical formula is

• P502
• P203
• P02
• P205

Under suitable conditions alkanes cannot undergo _____ reactions

• Hydrogenation
• Addition
• Combustion
• Substitution

The addition reaction of 2-butene with HBr produces

• 2-bromobutane
• 1,3-dibromobutane
• 2,3-dibromobutane
• 1-bromobutane

What is the unit of heat capacity

• kj.mol
• kJ/K
• JK-1
• kJmol-1

What is the reason of energy changes in chemical reactions

• Bond formation
• Bond formation and breakage
• Bond breakage
• Ionic bonds

How will be the rate of reaction, if the slope of the curve is greater near the start of the reaction

• Constant
• Equilibrium
• Greater
• Lesser

The rate of reaction between two specific time intervals is called

• Rate of reaction
• Average rate of reaction
• Instantaneous rate of reaction
• Initial rate

In reversible reaction, when product is removed, the equilibrium shift towards the:

• Product side
• Both side one by one
• Reactant side
• No effect

Which one of the following gases has the lowest density under room conditions

• Fluorine
• Neon
• Oxygen
• Nitrogen

What is the proton (atomic number) of an element that has four unpaired electrons in its ground state

• 22
• 26
• 6
• 14

Which element has the ground state electronic configuration of 1s2, 2s2, 2p6, 3s2, 3p6

• Na
• Ar
• Cl
• S

When 6d orbital is filled, the entering electron goes into

• 7p
• 7f
• 7d
• 7s

If phenol is treated with 3 moles of conc. HNO3 in the presence of H2SO4 what will be the product

• O-nitro phenol and P-nitro phenol
• Picric acid
• P-nitro phenol
• O-nitro phenol

The appearance of a silver mirror in Tollens’ test indicates the presence of which of the following

• An acid
• An aldehyde
• A ketone
• An alcohol

What is the IUPAC name of diisopropyl ketone

• 1,3-Dimethylpropan-2-one
• 2,4-Dlmethylpentan-3-one
• 2,4-Dimethylpentan-2-one
• 1,3-Diisopropylpropan-2-one

In SN1 reactions the correct order of reactivity of alkyl halide is

• Tertiary>secondary>primary
• Secondary>primary>tertiary
• Primary>tertiary >secondary
• Primary>secondary>tertiary

Which of the following reagents can be used to distinguish between 1-Pentyne and 2-Pentyne

• 1 % alkaline dilute KMnO4
• K2Cr207 +H2504
• Br2/CCI4
• AgNO3 + NH4OH

Which of the following transition metal show 3d5 configuration in its +2 oxidation state

• Mn+2
• Zn+2
• Fe+2
• Cu+2

Cell wall of prokaryotic cell is composed of:

• Proteins
• Carbohydrates & Proteins
• Carbohydrates
• Proteins & Lipids

Which structure of prokaryotic cell will play the role of mitochondrion

• Nucleoid
• Spores
• Cyst
• Mesosomes

 Proteins and lipids are modified into Glycoproteins & Glycolipids by which cell organelle

• Ribosomes & chromosomes
• Smooth Endoplasmic Reticulum
• Golgi complex
• Rough Endoplasmic Reticulum

Cyclosis and amoeboid movements are due to:

• Microtubule
• Cilia
• Intermediate filaments
• Microfilaments

Most of the monosaccharides form a ring structure when in solution. For example ribose will form a five cornered ring known as:

• Glyceraldehyde
• Acetaldehyde
• Glucopyranose
• Ribofuranose

Which type of bond must be broken for water to vaporize

• Polar covalent bonds
• Hydrogen bonds
• Covalent bonds
• Non-polar covalent bonds

The specific heat of vaporization of water plays an important role in the regulation of heat produced by

• Redox
• Oxidation
• None of above
• Reduction

Biologically, _____ plays key roles in maintaining the integrity of lipid bilayer membranes

• Hydrophobic exclusion
• Hydrophilic exclusion
• Specific heat capacity
• Heat of vaporization

Energy is by the breakdown of complex molecules into simpler ones, such reactions are called catabolic reactions

• Consumed
• Produced
• Released
• Destroyed

____ forms almost three-fourth of the body by weight

• Lipid
• Carbohydrates
• Protein
• Water

The major enzymes involved in transfer of phosphate group from ATP to Glucose is:

• Decarboxylase
• Kinase
• Isomerase
• Dehydrogenase

 Out of 36 ATPs, how many are produced in electron transport chain

• 34
• 28
• 32
• 30

Which is the major event in electron transport chain

• Substitution
• Decarboxylation
• ATP synthesis
• Isomerization

Which of the following is used in baking

• Anaerobic respiration
• Internal respiration
• Aerobic respiration
• External respiration

The provirus of HIV is structurally and chemically made up of

• ssRNA
• dsDNA
• dsRNA
• ssDNA

The molecule used to control virus during infection of animal cell are

• Antigen
• Interferon
• Histone
• Serum

Virus is what type of agent

• Non-Protein agent
• Non-infectious agent
• Infectious agent
• Cellular agent

The labor pains to expel fetus are due to action of oxytocin on:

• Endometrium
• Myometrium
• Perimetrium
• Ovaries

In human females what is the small, pear-shaped, muscular, distensible, sac-like organ where gestation takes place

• Stomach
• Uterus
• Kidney
• Fallopian tube

All the following are disinfectants to control bacterial growth except:

• Mercuric Chloride
• Tincture of Iodine
• Potassium Permanganate
• Hydrogen Peroxide

Which of the following is an example of spiral shaped bacteria

• Hyphomicrobium
• Escherichia coli
• Pseudomonas
• Diplococcus pneumoniae

Bacterial cell have ability to maintain its shape through

• Cell wall & slime
• Slime
• Capsule
• Cell wall

Helicobacter pylori is an example of

• Pleomorphic
• Spiral
• Bacilli
• Cocci

Number of layers of cell wall in Gram positive bacteria is

• 4
• 1
• 2
• 3

The method of bringing oxygenated air into contact with a gas exchange surface is called

• Gas transport
• Respiration
• Ventilation
• Photorespiration

Smooth muscles are found in all mentioned below except:

• Bronchi
• Alveoli
• Trachea
• Bronchioles

Only those genes can assort independently whose loci are on:

• Same chromosomes
• Non-homologous chromosomes
• Same chromatids
• Homologous chromosomes

Which one of the following is X Linked Dominant disorder

• Color blindness
• Hypophosphatemic rickets
• Hypertrichosis
• Haemophilia

What of the following virus contains single stranded DNA

• Adeno virus
• Pox virus
• Herpes virus
• Parvo virus

Feeding by living in or on the other organic (host) belonging to different species is called

• Parasitic nutrition
• Saprophytic nutrition
• Symbiotic nutrition
• Mineral nutrition

____ describes how water and dissolved chemicals are carried through the cell wall and intercellular gaps of plants

• Symplast Theory
• Apoplast Theory
• Vacuolar Theory
• Cytoplasmic Theory

The movement of water to lower solute concentration area through a semipermeable membrane is

• Soil potential
• Pressure potential
• Solute potential
• Osmotic Potential

Four chambered heart with right systemic arch only is present in

• Mammals
• Reptiles
• Birds
• Amphibians

Excretion in Planaria takes place by

• Nephron
• Malpighian tubules
• Protonephridia
• Metanephridia

The body of which is called metamerically segmented

• Annelids
• Cnidarians
• Nematodes
• Sponges

Enteron is the characteristic feature of:

• Phylum Porifera
• Phylum Cnidaria
• Phylum Plathehelminthes
• Phylum Echinodermata

The term menopause means:

• Stop of ova production
• Degeneration of ovaries
• Start of menstruation
• Start of ovulation

Cartilage is a type of which tissue

• Muscular tissues
• Connective tissues
• Nervous tissues
• Epithelial tissues

Irregular striations and involuntary control is related to

• Skeletal muscle cells
• Smooth muscle cells
• Fibroelastic cartilage cell
• Cardiac muscle cells

The cell membrane of muscle cell is:

• Sarcomere
• Sarcoplasm
• Myofibrils
• Sarcolemma

During sliding of actin filaments, ATP is used for

• Shortening of filament
• Cross bridge formation
• Dragging filaments
• Cross bridge breaking

Test cross is made to check the genotype of a trait. Which of the following crosses is a test cross:

• Unknown x AB
• Unknown x TT
• Unknown x tt
• Unknown x At

The final destination of lymph is:

• Subclavian vein
• Lymph node
• Lymph capillaries
• Lymphoid organs

Descending aorta is bifurcated into two vessels which on further division from femoral artery that supply blood to high muscles of legs:

• Temporal artery
• Iliac artery
• Iliac vein
• Sciatic artery

Which of the following is the main point of Darwinism

• Disuse of organ
• Perceived unity of life
• Over production
• Variation

Which of the following type of organs are supposed to be functional in ancestral species rather than in present day species:

• Vestigial organs
• Embryonic organs
• Homologous organs
• Analogous organs

Cells of different types can be distinguished on the basis of surface

• Glycolipids and glycoproteins
• Cholesterol
• Globular proteins
• Phospholipids

The pressure receptors the receive deep pressure stimulus A human body are called:

• Red Blood Corpuscles
• Meissner Corpuscles
• Pacinian Corpuscles
• Cholesterol

The chemical messengers that transmit action potential across the synapse in the form of chemicals are

• Acetylcholinesterase
• Reflex actions
• Neurotransmitters
• Synaptic knob of synapse

The value of active membrane potential of the neuron is:

• 0.05 volts
• 0.02 volts
• 0.07 volts
• 0.01 volts

In a typical nerve, the action potential duration is:

• 1 minute
• 1 microsecond
• 1 second
• 1 millisecond

What is true about Oxytocin

• Stimulates ICSH
• Perform cellular fun
• Dilate milk ducts of mammary glands
• Acts on kidney tubules

NAD is an important

• Hormone
• Vitamin
• Enzyme
• Coenzyme

The active sites of enzymes are composed of

• Few Nucleosides
• Few Saccharides
• Few Nucleotides
• Few Amino Acids

Competitive inhibitors are _____ .

• Smaller than substrate
• Homologous to substrate
• Larger than substrate
• Analogous A substrate

Which enzyme is different from others

• Trypsin
• Lactase
• Pepsin
• Chymotrypsin

The enzyme which can work on Ph 7 of the medium is

• Pancreatic lipase
• Pepsin
• Sucrase
• Chymotrypsin

According to evolutionary studies, prokaryotes may have arisen around:

• 3.5 billion years ago
• 4.5 billion years ago
• 5.5 billion years ago
• 2.5 billion years ago

Which of the following is the main point of Darwinism

• Muscle atrophy
• Snake’s legs
• Shedding of milk teeth
• Movement A ear

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