UHS MDCAT Past Papers MCQs 2024 PDF Download

Antibodies are manufactured in

Red blood cells
T lymphocytes
B lymphocytes
Platelets

In human heart, the left atrium receives

The coronary sinus
The superior Vena Cava
The inferior Vena Cava
The four pulmonary veins

Autoimmune disease act at the principle of

Self against self
Antigens against self
Antigens self-destroyed
Self against antigens

Which of the following blood vessels have the highest pressure of blood?

Vena cava
Pulmonary arteries
Aorta
Pulmonary veins

The cells which play very important in developing immunity are

Thrombocytes
Monocytes
Neutrophils
Lymphocytes

The only vein in human body carrying oxygenated blood is

Femoral
Renal
Pulmonary
Iliac

Regarding structure of human heart chordae tendinea are present in

Aortic valve
Ventricles
Atria
Pulmonary valvea

In roots the apoplast pathway of water is disrupted when water reaches

Cortex
Endodermis
Plasmodesmata
Pith

Select an amniote from the following

Snake
Crocodile
Parrot
All of them

Photophosphorylation takes place in the ____ of the chloroplasts

Inner membrane
Outer membrane
Stroma
Granum

The directional movement toward or away from the stimulus is called

Taxis
Tropism
Non orientation
Orientation

Which of the following is true about amoeba?

They have flagella
They do not cause any disease in humans
They move by forming specialized cytoplasmic projections called pseudopodia
They are multicellular

Red algae do not contribute towards

Making fertilizers
Forming limestone deposits
Making coral reefs
Forming chalk deposits

Which of the following is TRUE about the structure of a typical bacterium?

It has genetic material
All of the above
It has cytoplasm
It has a cell wall

Select a method which causes the oxidation of constituent of a bacterial cell

Dry heat
Radiation
Filtration
Steam

Which of the following is not TRUE about Human Immunodeficiency virus ( HIV)?

It is retrovirus
It causes the deficiency of the human immune system
It is surrounded by an envelop
It does not cause AIDS

The complete, mature and infection virus particle is known as

Virion
Venome
Capsid
Genome

Numerous opportunistic diseases might attack a person suffering from which of the following diseases?

Measles
AIDS
Influenza
Hepatitis A

Which of the following is not related to the enveloped virus?

They are tolerant to antidotes
Their envelop is sensitive to sunlight
They survive for a short time
Envelop is derived from host

The end product of glycolysis in acrobic respiration is

Lactate
Ethanol and carbon dioxide
Pyruvate
Acetyl CoA

This theory says that “mitochondria and chloroplast area in effect ancient bacteria which now live inside the large cells”

Endosymbiont theory
Neo-Darwinism
Lamarckism
Darwin’s theory of evolution

Which of the following is not necessary for PCR to occur?

DNA fragments
ATP
Primers
Ribonucleotides

Transgenic organisms

Have an important role in the large scale production of medicinal products
Are considered beneficial to humans
All of the above
Have a foreigh gene inserted into them

Which of the following is the components/ tools of recombinant DNA technology?

Molecular scissors
Molecular glue and expression system
All of the above
Gene of interest

What is the effect of DNA ligase?

DNA transcription occurs
DNA replication occurs
DNA fragments are joined together
DNA is broken up at specific sits

It is a method for rapid production of a very large number of copies of a particular fragment of DNA

DNA extraction
Gel electrophoresis
Polymerase chain reaction
Recombination

The DNA that has been altered and which now contains length of nucleotides from two different organisms is called a

Recombinant DNA
Combined DNA
Vector
Plasmid

___ occurs because natural selection gives some alleles a batter chance of survival than others

Artificial selection
Fitness
Evolution
Crossing over

The organs which are similar but differ in structure are called

Convergent evolution
Homologous organs
Analogous organs
Divergent evolution

Which statement correctly describes transcription of DNA?

It produces amino acids
It produces messenger RNA
It results in increased DNA synthesis
It is a semi conservative process

At what phase the DNA content of a cell is doubled?

Telophase
Interphase
Prophase
Anaphase

During meiosis, the homologous chromosomes comes together and form pairs this process is called

Linkage
Crossing over
Synapsis
Pairing

The particular array of chromosomes that an individual process is called its

Genotype
Allele
Karyotype
Phenotype

Transcription is the process in which an RNA copy of the DNA sequence and coding the gene is produced with help of an enzyme called:

RNA polymerase
RNA transcriptase
DNA polymerases
DNA transcriptase

The cells in our body are all genetically identical apart from the

Muscle fibers
Reproductive cells
Somatic cells
White blood cells

Which one of the following is found in both messenger RNA and DNA of a mammalian cell?

Thymine
Double helical structure
Sugar- phosphate backbone
Ribose sugar

Phenotype is

Partner of gene pair
The form of appearance of a trait
The position of a gene on the chromosome
The genetic complement ie the genes in an individual for a particular trait

In electron transport chain, ATP synthesis takes place when electron moves from

Primary electron acceptor (PEA) to plastoquinone
Cytochromes to plastocyanin
Plastocyanin (Pc) to photosystem 1 (PS-I)
Plastoquinone (Pq) to cytochromes

Which of the following is a copper containing protein in the electron transport chain?

Ferrodoxin
Plastoquinone
Plastocyanin
Cytochrome-C

Which of the following processes does not need pyruvic acid as a substrate?

Calvin cycle
Alcohol dermentation
Aerobic respiration
Lactic acid dermentation

What is the function of ribulose?

Intermediate in cellular respiration
Component of DNA and RNA
Intermediate in photosynthesis
Respirator fuel

First stable compound during calvin cycle is

Ribulose bisphosphate
1,3 bisphosphoglycerate
3-phosphoglycerate
Glyceraldehyde 3-phosphate

Enzymes work by lowering the ___ of the reactions that catalyze

Kinetic energy
Activation energy
Heat energy
Potential energy

Most enzymes have and optimum temperature of around

20 C
30 C
50 C
40 C (close to exact range i.e 36.1 to 37.8)

Lock and key model of enzyme action proposed by Emil Fischer suggested that

Enzymes are restricted to one reaction type
Enzymes are restricted to one reaction type
Enzymes are unbiased for the substrate
An enzyme can catalyze variety of reactions

NAD is an example of

Dinucleotide
Tetra cucleotide
Tri nucleotide
Mononucleotide

Monosaccharides have a general formula represented by

C2(H2O)n
C2(H2O)n
C(H2O)n
Cn(H2O)n

Which of the following is an unsaturated fatty acid?

Palmitic acid
Butyric acid
Oleic acid
Acetic acid

Lipids store double amount of energy as compared to carbohydrates because of

Low proportion of carbon
High C-O ratio
High proportion of C-H
High proportion of oxygen

Water act as universal solvent because of

High polarity
Cohesion and adhesion
Hydrogen bonding
Heat of vaporization

Which property of water helps to maintain the integrity of cell membranes?

Specific heat capacity
Hydrophobic exclusion
Hydrogen bonding
Cohesion and adhesion

Which of the following organelles are involved in the synthesis of plant cell walls?

Peroxisomes
Lysosomes
Endoplasmic reticulum
Golgi complex

Select the one which is not a function of smooth endoplasmic retidulum (SER)?

Transmission of impulses
Metabolism of lipids
Processing of glycoproteins
Transport of materails

The membrane separating the vacuole from cytoplasm is called

Cristae
Cisternae
Vacuolar membrane
Tonoplast

According to the fluid mosaic model of cell membrane, which zone is embedded inside?

Filamentous
Hydrophobic
Globular
Hydrophilic

70S size ribosomes are found in the cells of

Fungi
Algae
Bacteria
Protozoans

In which type of cell, Cell wall is not present?

Bacterial cells
Fungal cells
Plant cells
Liver cells

When both the alleles of a gene are the same, the organism is said to be:

Heterozygous
Genotype
Homozygous
Phenotype

Alleles both have an effect on the phenotype heterozygotic organism

Multiple
Co-dominant
Recessive
Dominant

Which traits are most likely to affect men than women?

Autosomal dominant
Autosomal recessive
X linked dominant
X linked recessive

Haemophilia A and B, color blindness and testicular feminization are example of :

X-linked dominant trait
Y-linked inheritance
Pseudosutosomal trait
none of these

Which of the following hormones of the pituitary gland regulate the menstrual cycle?

Follicle stimulating hormone and estrogen
Estrogen and progesterone
Luteinizing hormone and estrogen
Follicle stimulating hormone and luteinizing hormone

Which of the following diseases is sexually transmitted?

AIDs
Dengue fever
Cholera
Tuberculosis

Which of the following represents the changes that occur in the ovary and the uterus approximately every 28 days involving evolution with the breakdown and loss of the linning of the uterus

Menstrual cycle
Embryo formation
Ovulation
Uterine cycle

___ is a junction between two neurons or between a motor neuron and a muscle cell

Cleft
Synapse
Axon
Impulse

Neurons are cells adopted for the rapid transmission of electrical impulses. To do this, they have long thin process called:

Axons
Dendrited
Schwann cells
Myelin sheath

Which of the following is common to all neurons?

Presence of Schwann cells
Presence of node of Ranvier
A thick myelin heath
A cell which contains a nucleus

Which one of the following ‘myogenic’ types of muscle?

Skeletal muscles
Smooth muscles
Glandular muscles
Cardiac muscles

Which of the following muscles are considered as ‘Voluntary Muscles’?

Smooth muscles
Cardiac muscles
Skeletal muscles
Glandular muscles

Which body function is controlled through a positive feedback mechanism?

Labor contractions
Body temperature
Thyroxin release
Insulin production

Which of the following neurotransmitters function, both as neurotransmitter and hormones, decreasing our perception of pain?

Dopamine
Epinephrine
Endorphins
Serotonin

What do we call the cell surface membrane of a muscle fiber?

Sarcoplasm
Sarcolemma
Plasma membrane
Myofibrils

The active uptake of sodium in the ascending limb or thick loop of henle is promoted by the action of

Cortisone
Aldosterone
ADH
Thyroxine

As an excretory organ, liver

All of the above
Produces urine and uric nitrogen of amino acids
Detoxifies many chemical poisons
Produces ammonia for excretion by the kidneys

In humans, the temperature regulation control center is located in

Lungs
Kidneys
Brain
Liver

The excretion of hypertonic urine in humans is associated best with the

Glomerular capsule
Proximal convoluted tubule
Distal convoluted tubule
Loop of henle

When the temperature of the body surrounding rises, the baby responds by

Shivering
Vasoconstriction
Vasodilation
Raising body hairs

Not only the parents but also their son ___ for interview

Have called
Has called
Has been called
Have been called

Choose the correct option:

Every one of the prisons are full
Every one of the prisons had full
Every one of the prisons is full
Every one of the prisons have full

Choose the correct option:

He and I were playing
He and I was playing
He and I was being playing
He and I were being playing

Choose the correctly punctuated sentence:

What a fall was there! My countrymen. Long live the King!
What a fall was there, my countrymen, Long live the king.
What a fall was there, my countrymen! Long live the king!
What a fall was there, my countrymen, Long live the king.

Pick the correct option: his first inning consists of four 6s and three 4s

His first innings consist of four 6’s and three 4’s
His first innings consist of four 6’s and three 4’s
His first inning’s consist of four 6’s and three 4’s
His first inning’s consists of four 6 and three 4

Ahmed ____ me for a long time

Knows
Know
Have known
Knew

She always carried un umbrella. The sentence indicates___tense.

Past simple
Present tense
Past perfect
Present perfect

Choose the correctly structured sentence.

Had he lives in England he had missed his family
Had he live in England he will missed his family
Had he lived in England, he would have missed his family
Had he lived in England he would miss his family

Pick the correct option

No star is brighter than moon
No start is brighter then the moon
No star is more bright than the moon
No start is brighter than the moon

Choose the correct sentence

I wish I was millionaire
I wish I were a millionaire
I wish I have been a millionaire
I wish I am being a millionaire

Fill in the blank with the appropriate article as required. Umbrella is of no avail against a thunderstorm

A
An
No article required
The

Identify the errors and choose the correct option:

Gulliver travel was written by swift
Gulliver’s travel was written by swift
Gulliver’s travels was written by swift
Gulliver travels was written to swift

Identify the errors and choose the correct option:

I hope this letters finds in the best of your spirits

I hope this letter finds you in best of your spirit
I hope letter finds you in the best of spirits
I hope the letter found you in greatest of spirit
I hope this letter will find you in good of high spirits

Choose the correct option:

Knowledge and wisdom____ no time for connection

Have
Are
Has
Had

The Headmaster____ to speed to you

Want
Was wanting
Is wanting
Wants

Choose the correct spelling

Definite
Definite
Definite
Dafanite

Choose the correct spelling

Eccentric
Accentric
Eccentrac
Akcantric

Choose the correct spelling

Cotioned
Coschuned
Causchuned
Cautioned

Choose the correct spelling

Exantuated
Accenchuated
Axantuated
Accentuated

We prefer fruits _____ sweets

Over
From
To
On

Which pair has 1 electron in its ‘s’ orbital?

H & He
Na & Cr
K & Mn
Li, Fe

Purification of table salt (NaCl) by passing HCL gas through its saturated aqueous solution is an example of:

Hess’s law
Law of mass action
Common ion effect
Henry’s law

For a gaseous phase reaction, when number of moles of reactants and products are equal:

The values of Kc is greater than Kp
The values of Kp is greater than Kc
N = The values of Kp and Kc are different1-1
The values of Kp and KC are the same

The lattice energy is also called as:

Potential energy
Energy of affinity
Crystal energy
Bond energy

Which of the following is not a molecular solid?

Carbon dioxide
Phosphorus
Bromine
Sulphur

Which of the following has the lowest vapour pressure at 20 C?

Carbon tetrachloride
Water
Diethyl ether
Chloroform

CO2 and SO2 both are triatomic molecules but heat of vaporization of SO2 is greater than that of CO2 due to:

SO2 is more acidic than CO2
SO2 is polar and CO2 is nonpolar
High electronegativity of S
Greater size of SO2

The actual volume of gas molecules is considered negligible at following pressures:

6 atm
2 atm
4 atm
8 atm

According to the general gas equation density of an ideal gas depends upon:

Pressure
Molar mass of the gas
Temperature
All are correct

Which of the following has the lowest e/m ratio?

He
Li^+2
Be
H^+1

Which of the following hybrid orbitals has maximum ‘S’ –character?

Dsp2 – hybrid orbital
Sp3 – hybrid orbital
Sp2 – hybrid orbital
Sp – hybrid orbital

Quantum number values for ‘2p’ orbitals are:

N=1, I=2
N=1, I=0
N=2, I=1
N=2, I=0

The relationship between quantum number n and I is:

I = n-2
N = 1-1
N = 1-2
I = n-1

The empirical formula of Glucose C6H12O6 is:

CH2O2
CHO
C6H12O16
CH2O

In a vessel, 10g N2, 10g H and 10g O2 are present. Which one will have the least number of atoms?

O2
N2
H2
Both H2 & N2

The efficiency of chemical reaction can be expressed as:

Actual yield
Maximum yield
%yield
Theoretical yield

The first ionization energy is maximum for:

Which of the following has the height value of electronegativity?

During oxidation process, oxidation number of an element:

Remains constant
Both Increase & Decrease
Increases
Decreases

The common oxidation number of halogens is:

0
-1
+1
-2

The oxidation state of ‘S’ in the (S2O3)^-2 is:

+2
+6
+4
-2

One calorie is equal to:

4.18 KJ
4.18
0.418 KJ
0.418 KJ mol

Born-Haber cycle is used to determine the lattice energies of:

Metallic solids
Molecular solids
Ionic solids
Covalent solids

The thermal energy at constant pressure is called:

Internal energy
Enthalpy
Work done
Heat capacity

For which of the following order of the reaction, rate of reaction in inversely proportional to the concentration reaction?

2nd order reaction
Zero order of reaction
Negative order of reaction
1st order reaction

For the reaction A(g) → products, when the concentration of A(g) doubles, the rate of reaction increases four fold, which means it is:

Second order reaction
Zero order reaction
First order reaction
Negative order reaction

The study of rates of chemical reactions and the factors that affect the rates of chemical reactions is known as:

Electrochemistry
Chemical kinetics
Stoichiometry
Thermodynamics

The unit of the rate constant is the same as that of the rate of reaction in:

Zero order reaction
Third order reaction
First order reaction
Second order reaction

The equation N2g + 3H2g = 2NH3, represents:

Avogadro’s law
Haber’s process
Solvay process
Contact process

Which of the following reaction has greater Kp than Kc (kp>Kc)

2NO + Cl2 ↔ 2NOCl
2NOCL ↔ 2NO + Cl2
2SO2 + O2 ↔ 2SO3
NO2 + 3H2 ↔ 2NH3

When CH3 is attached with the benzene ring, it makes the ring:

Good Electrophile
Resonance hybrid
Extraordinary stable
Good nucleophile

In alkanes, each carbon has hybridization:

Sp3
Sp
SP2
Dsp

Acetophenone can be formed by which of the following reaction of benzene?

Halogenation
Nitration
Alkylation
Acylation

Electrophile in sulphonation of benzene is:

H2SO4
SO3
HSO3-
HSO4

Generic formula of cycloalkane is?

CnH2n+2
CnH2n-2
CnH2n
CnH2n+1

The type of isomerism existing in a compound of molecular formula C2H60 is:

Position
Chain
Metamerism
Functional group

Select the organic compound which belongs to Arene family;

CH2=CH2
C6H6
CH3-O-CH3
CH3- NH2

The transition element which does not show variable valency is:

Based on the physio – chemical properties, proteins may be classified into the following types:

Compound proteins
Derived proteins
Simple proteins
All of the above

Electronic configuration of chromium (proton number 24) is:

[Ar] 3d^4 4S^2
[Ar] 3d^6 4S^2
[Ar} 3d^5 4S^2
[Ar] 3d^5 4S^1

In 3rd series of transition elements, paramagnetic behavior is maximum for Mn+2 and:

V^3+
Zn^+2
Ti^3+
Cr^3+

Densities of alkali metals are low due to:

Smaller size
ns1 configuration
Large atomic volume
Weak intermolecular forces

Magnesium reacts with nitrogen to form:

Mg3N2
MgN
MgN2
Mg2N2

Potassium, Rubidium, Cesium react with oxygen to form which types of oxides?

Normal oxide
Suboxide
Peroxide
Superoxide

L-Asparaginase enzyme has been used for the treatment of:

Rickets
Jaundice
Heat disease
Blood cancer

Based on function, thyroxin can be classified as:

Structural protein
Transport protein
Genetic protein
Hormonal protein

The exact reactivity order for carboxylic acid derivatives is:

Acychloride> anhydride > Ester
Anhydride >acylchloride> ester
Ester > anhydride >acylchloride
Amide >acylchloride> ester

Hydrolysis of acyl chloride results in the formation of:

Amides
Acid anhydride
Carboxylic acid
Esters

Alkyl halides involving –C –X bond breakage and –C –Nu bond formation

SN2
E2
SN1
E1

Which of the following is the strongest acid?

Flouroethanoic acid
Propanic acid
Nitroethanoic acid
Trichloroethanoic acid

Which of the following reagents is used to separate and purify carbonyl and non- carbonyl compounds?

H2O
NaHSO3
BrMgCH3
HCN

Phenol is more acidic than alcohol because of the following reason:

Delocalization of negative charge in the ring
Delocalization of positive charge on the OH group
Delocalization of negative charge in the OH group
Delocalization of positive charge on the carbon atom in ring

Phenol is known as:

Carbolic acid
Carbonylic acid
Carboxylic acid
Carpolic acid

IUPAC name of C6H5O ( CH3)2 is:

3 – Methyl cyclohexanone
2,6 – Dimethyl cyclohexanone
2-Methyl-3-Hexanone
4 – Methyl – 3- hexanone

R-X on reaction with alcohols forms:

ROR
RH
R-X-OH
R-OH

Ohm time’s farad is equivalent to:

Distance
Time
Charge
Capacitor

If a stationary bar magnet is placed near a coil at rest so maximum lines of force passes
through the coil, the galvanometer shows:

Intermediate value of current
Maximum current
No current
Minimum current

Transformer is device which steps up or steps down the input:

Energy
Current
Voltage
Power

Magnetic flux is maximum when the angle between magnetic field and vector area is:

0°
45°
90°
180°

When current are flowing through two long parallel wires in same direction
electric field between them is:

Infinite
Remains constant
Strong
Weak

The change in resistance of metallic conductors at temperature below 0 C is:

Non linear
Curvilinear
Linear
Curve

One of the following is an ohmic device:

Filament bulb
Transistor
Copper wire
Semiconductor diode

When a wire is compressed and its radius becomes 2R then its resistance will be:

4R
1/16R
1/4R
16R

One kilowatt-hours is commonly termed as one commercial uniq of electric energy which is equal to:

3.6 x 10^3 J
3.6 x 10^6 J
3.6 x 10^4 J
3.6 x 10^5 J

In capacitors, energy is stored in the form of:

Electric intensity
Gravitational energy
Kinetic energy
Magnetic induction

Using radiation therapy, cancerous thyroid is treated with radioisotope:

Iodine-131
235 uranium
Carbon
Thorium

There are initially 400 atoms in a radioactive sample. What of atoms after 3 half-life?

The main difference between X-rays and ? rays is:

Frequency
Energy
Wave length
Origin

Which one of the following series lies in the ultraviolet region?

Balmer series
Lyman series
Pascher series
Bracaket series

Which photon carries the most energy?

Blue
Violet
Red
Green

The wavelength associated with an electron is of the order of:

Radio waves
X-rays
Infrared
Visible light

In full wave rectification, the diodes are used:

If during circular motion, tangential velocity of a body becomes double then centripetal force becomes ;

Four times
Double
One half
One fourth

PIV stands for:

Positive inverse charge
Peak integrated voltage
Power integrated voltage
Peak inverse voltage

The domestic electricity supply has a frequency of:

150 Hz
25 Hz
100 Hz
50 Hz

In transmission from grid station, power losses are maximized by:

Increasing resistance
Increasing current
Increasing voltage
Decreasing current

If we drop an object, its initial velocity is zero. How far will it fall in time ‘t’?

4.9 t2
0.49 t2
98 t2
9.8 t2

The slope of distance – time graph will always be:

Maximum
Positive
Negative
Zero

1 radian is equal to:

57.3°
57.4°
57.2°
57.1°

The earth rotates on its axis once a day. Suppose, by a dome process the earth contracts so that its radius is only half as large as at present, then how long will the earth take to complete its rotation?

12 hours
18 hours
24 hours
6 hours

Which one of the following forces is a non conservative force?

Gravitational force
Frictional force
Electric force
Elastic spring force

Under what condition an object will have zero displacement but non zero distance?

Random motion
Linear motion
Osciallation
Circular motion

When the speed of your car is halved, by what factor does its kinetic energy decrease?

1/6
1/8
1/4
1/2

What is the speed of 2.0 kg metallic bob at the mean position of a simple pendulum, when released from its extreme position 0.5 m height ? (g = 10m/s-2)

10 ms-1
50 ms 1
100 ms-1
3.16 ms-1

A 1.75m heighted weight- lifter raises weight with a mass of 50kg to a height of 0.5m above his head, how much work is being done by him? (g = 10m/s-2)

250 J
50 J
2125 J
1225 J

The newton-second is unit of:

Work
Momentum
Impulse
Power

At what angle of projection of a projectile the range becomes half of its maximum value?

15°
30°
40°
20°

The values of electric intensity will due to the presence of dielectric medium

Decrease
Increase
Increase exponentially
Remain same

The internal energy of a system during an isothermal process:

Remain constant
Increase
Decrease
Becomes zero

In which process the entire heat supplied to the gas is converted to the internal energy of the gas?

Isothermal process
Adiabatic process
Isobaric process
Isochoric process

In a ripple tank, 40 waves pass through a certain point in 1 second. If the wavelength of the wave is 5 cm, then speed of the wave is:

1 ms-1
2 ms-1
0.5 ms-1
1.5 ms-1

Astronomers calculate the speed of distant stars and galaxies using which of the following phenomena?

Doppler effect
Interference
Beats
Superposition principle

The speed of sound in air is 332m/s, the speed of sound at 22 C will be:

330 m/s
350 m/s
345.2 m/s
340 m/s

Which one of the following properties is not exhibited by the longitudinal waves?

Reflection
Interference
Polarization
Diffraction

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