Sindh MCAT NTS 2014 DUHS and JSMU

The following observations refer to evolution: I. Inherited variations that are ‘favored’ in particular environments are passed on. II. There is a struggle for existence. III. In time, ‘favored’ inherited variations may accumulate causing gradual changes in the organism. IV. Although populations tend to overproduce, they remain more or less constant in numbers from generation to generation. In what sequence should the statements be placed to support Darwin’s theory of evolution?

In birds the male is the homogametic sex. A male bird showing the recessive trait was mated with a female showing the dominant trait of a characteristic governed by a pair of alleles which are sex-linked. What is the probability that the male offspring will show the dominant trait?

The first cell to contain the diploid number of chromosomes is:

The following are all features of eukaryotic cells:I. chloroplastII. peroxisomeIII. lysosomeIV. mitochondrionv. nucleusWhich of these has a double membrane?

The adaptive feature(s) which help(s) the fish to live in water include(s):

Living things that would be the first to experience adverse effects if large amounts of carbon dioxide were taken out of the biosphere are:

Which of the following organelles are present in all the bacteria?

Haploid and monoploid numbers of chromosomes of hexaploid wheat are:

The diagram shows the ultrastructure of a chloroplast as seen in section. What are the functions of P, Q, and R?

Consider the following statements about biological communities.I. Their members share a common gene poolII. The community remains stable even though some physical aspect of the environment may undergo a changeIII. It consists of all the populations living in a particular area.IV. A community interacts with a non-living environment and both function together to form an ecosystemWhich two of the above statements are true?

How many meninges cover the human brain?

At what point are two populations descending from the same ancestral stock considered separate species?

The diagrams below show chromosomes in a cell undergoing mitosis and in a cell undergoing meiosis. Which of the following names the stages of division correctly?

The diagram represents the human respiratory system. While inhalation, which of the labelled muscles contract?

In an experiment, the production of hormone secretin was blocked. As a result, levels of all of the following enzymes were affected EXCEPT:

The scientific name of potato is Solanum tuberosum and that of brinjal is Solanum melongena. This indicates that both potato and brinjal are members of the:

In the northern hemisphere, a tundra type of growth:

Joints found at the vertebrates are:

Flower color is controlled by a single pair of alleles. The allele for red flowers is dominant to the allele for white flowers. A plant homozygous for red flowers is crossed with a plant homozygous for white flowers. All the resulting plants have red flowers (F1 generation). When the F1 generation crosses with each other, 18 plants are obtained. 12 plants have red flowers and 6 have white flowers (F2 generation). What ratio is expected in the F2 generation and what ratio has been obtained?

Which of the following is true in angiosperm life cycle?

What is the correct order of arthropod groups, from those with the most legs to those with the fewest legs?

Guttation is the result of:

Booklungs serve the function of respiration in:

Which of the following statements concerning nucleolus is correct?

An anticodon is the sequence of the nitrogenous bases on the:

Four events in the transmission of nerve impulses across synapses are:I. Depolarisation of the presynaptic membraneII. Propagation of postsynaptic action potentialIII. Reabsorption of the transmitter substanceIV. Release of transmitter substance into the synaptic cleftIn which sequence do these events occur?FIRST -> LAST

By which process is the water lost?

When a red stain is added to a culture containing both living and dead cells, only the dead cells take up the stain.Which structure(s) prevent(s) the stain entering the living celis?

The autonomic nervous system controls all of the following activities except:

The gland known as the" gland of emergency" is the

The site and principal mechanism for the passage of glucose into the bloodstream in the human kidney is the:

Which one of the following ions exhibits d-d transition and paramagnetism as well?

How many sigma groups are there in benzene?

Which of the following compounds is formed when sodium burns in excess of air?

If products of a reaction act as a catalyst, such process is called:

The lower part of the “Solvay tower” has been cooled during the manufacture of soda ash because:

Which of the following is not an interstitial compound?

The reaction: Cl₂ + H₂O → HCl + HOCl is an example of:

Which of the following elements has the highest boiling point?

Which of the following statements is NOT true for the first law of thermodynamics?

Zinc reacts with dil. H₂SO₄ to give H₂. It also reacts with conc. H₂SO₄ to form SO₂. In these reactions:

In the following reaction:3Br2 +6CO32- + 3H2O → 5Br-1 + BrO3-1 + 6HCO3-1

Glass is a/an:

Nitrogen and phosphorus have 3 of their valence electrons unpaired because of:

In the reaction, 2SO2 (g) + O2 ⇌ 2SO3 (g) ∆H= -X cal most favorable conditions of temperature and pressure for a greater yield of SO3 are:

The only o, p−directing group which is deactivating in nature is:

For which one of the following gaseous equilibrium will an increase in pressure increase the yield of the product:

The stability of ionic crystal depends principally on:

The chemical reaction in which reactions require high amount of activation energy are generally:

The chemical analysis of a compound having a molecular mass 188 gives, C=12.8%, H=2.1%, and Br=85.1%. Its molecular formula is:

SN2 reaction at an asymmetric carbon of a compound always gives:

In the reaction, R-C≡C-R → the reagent used to convert alkyne into cis alkene is:

Ethanol, when reacted with PCI₅ , gave A, POCl₃, and HCI. A reacts with AgNO₂ to form B and AgCl. A and B are respectively:

The false statement regarding saline hydrides is:

H2SO4 has great affinity for water because:

If we balanced the following reaction, what is the net ionic charge on the right side of the equation? H⁺ + MnO₄^- + Fe²⁺ →Mn²⁺ + Fe³⁺ + H₂O

In those reactions where determination of enthalpy value is difficult by experiments, in such cases enthalpy value can be calculated by:

IUPAC name of the given compound is:

Monosaccharides contain _____ carbon atoms.

Which of the following is correct about Ascorbic acid?

Catalyst used in reaction CHCl3 + ½ O2 → COCl2 + HCl is ________ and its nature is _______.

A man pushes a box, initially at rest towards another man by exerting a constant horizontal force F of magnitude 5 N through a distance of 1m. Its final kinetic energy is?

The phenomena in which certain metals emit electrons when exposed to high-frequency light is known as?

A galvanometer has a resistance of 20 ohms and a full-scale deflection when a current of 0.001 ampere flows in it. What is the value of the series resistance to convert it into a voltmeter of range 10 volts?

The detection and estimation of an element in a mixture is sometimes nearly impossible, if it is present in very minute traces or if it’s chemical properties are very similar to those of other elements in the mixture. An effective technique is developed for these purposes is known as?

Sodium nucleus consists of 11 protons and 12 neutrons. The conventional symbol of this nucleus is?

The atomic spectra deals with the measurement of:

A rock is thrown straight upward from the edge of a 30 m cliff, rising 10 m then falling all the way down to the base of the cliff. Find the rock's displacement.

A moon of mass ‘m’ orbits a planet of mass 100 m. Let the strength of the gravitational force exerted by the planet on the moon be denoted by F₁, and let the strength of the gravitational force exerted by the moon on the planet be F₂. Which of the following is true?

When a force acts at right angles to the displacement (θ=90°) the work done is zero i.e. the force does not produce work. Identify the example/s from the following when work is zero. I. It is considered ‘hard work to hold a heavy stone stationary at stretched hand II. A person walks along a level surface while carrying a box III. When a body moves in a circular path

A circuit in which there is a current of 5 amp is changed so that the current falls to zero in 0.1s. If an average e.m.f of 200 volts is induced, what is the self-inductance of the circuit?

Light can be polarized by which of the following methods?I. scattering of lightII. double refractionIII. reflection

A student is performing a lab experiment on simple harmonic motion. He has two different springs (with force constants k1 and k2) and two different blocks (of masses m1 and m²). If k1 =2k2, and m1 = 2m2, which of the following combinations would give the student the spring-block simple harmonic oscillator with the shortest period?

If you wish to decrease the resistance of a circuit, you will add the resistors in ________.

Germanium and silicon are semiconductors having crystalline structures. Both these materials have ______ valence electrons in their outermost shells.

A 10 nanofarad (10 x 10-9 F) parallel plate capacitor holds a charge of magnitude 50 µC on each plate.If the plates are separated by a distance of 0.885mm, what is the area of each plate?

A neutron travels a distance of 12 m in a time interval of 3.6 x 10-4 s. Assuming its speed was constant, its kinetic energy is: (take 1.7 x 10-27 kg as the mass of neutron)

A steel rod has a length of 15 m at a temperature of 30°C. If the temperature is raised to 45°C. The increase in its length is:(α= 1.1 x 10-5 K-1)

A body having translatory motion possesses _____ and _____. In the same way a body having rotatory motion possesses _______ and _______.

The scalar product of (2i - j + 3k).(3i + 2j - k)?

When a body moves in the direction of gravitational force i.e. towards the earth, the work is done by the force of gravity on the body and is ______, whereas when the body moves against the direction of gravitational force, the corresponding work done is ______.

How much energy is dissipated as heat in 20 s by a 100 Ω resistor that carries a current of 0.5 A?

Which one of the following statements is true concerning the motion of an ideal projectile launched at an angle of 45° to the horizontal?

The volume occupied by a gram mole of a gas at 0°C and a pressure of 1 atmosphere is?

A sphere of charge +Q is fixed in a position. A smaller sphere of +q is placed near the larger sphere and released from the rest. The small sphere will move away from the large sphere with?

Kelvin, the unit of thermodynamic temperature is _____ of the thermodynamic temperature of the triple point of water.

A stone dropped from a certain height can reach the ground in 5 seconds. It is stopped after 3 seconds of its fall and then allowed to fall again. Find the time taken by the stone to reach the ground for the remaining distance.

A football, at rest on the ground, is kicked with an initial velocity of 10 m/s at a launch angle of 30°. Calculate its total flight time, assuming that air resistance is negligible.

A sound wave with a frequency of 343 H_z travels through the air. What is its wavelength? (speed of sound through air = 343 m/s)

A microscope has an objective of 10 mm focal length and an eyepiece of 25 mm focal length. What is the distance between the lenses, if the object is in sharp focus when it is 10.5 mm from the objective?

Identify the word or phrase that needs to be changed for the sentence to be correct:Mr. Ahmed is to old to work now; he depends upon his son.

Read the passage to answer the question:What is life? A little scum of no importance on the surface of an unimportant globe circling round a second-rate star? An accidental conglomeration of atoms which have come together by an odd chance, the result of an exceedingly improbable happening? That is what some astronomers would have us think. Looking out into the depth of space, they have discovered a universe of unthinkable dimensions. A billion suns in our own galaxy, beyond it perhaps a billion galaxies, only revealed to us as tiny smudges on a photographic plate. No wonder they are impressed by the enormous disparity between the scaffolding and the result. Life seemed to be, as Jeans said, ‘an utterly unimportant by-product’ in a universe which was clearly not designed for life, and which, to all appearances, is either totally indifferent or definitely hostile to it’. It seemed ‘incredible that the universe can have been designed primarily to produce life like our own; had it been so, surely we have might expected to find a a better proportion between the magnitude of the mechanism and the amount of the product.According to the author if the universe had been designed primarily to produce life like our own then:

Identify the word or phrase that needs to be changed for the sentence to be correct:The office is so busy that two extra clerks have had to be taken on.

Read the passage to answer the question:What is life? A little scum of no importance on the surface of an unimportant globe circling round a second-rate star? An accidental conglomeration of atoms which have come together by an odd chance, the result of an exceedingly improbable happening? That is what some astronomers would have us think. Looking out into the depth of space, they have discovered a universe of unthinkable dimensions. A billion suns in our own galaxy, beyond it perhaps abillion galaxies, only revealed to us as tiny smudges on aphotographic plate. No wonder they are impressed by the enormous disparity between the scaffolding and the result. Life seemed to be, as Jeans said, ‘an utterly unimportant by-product’ in a universe which was clearly not designed for life, and which, to all appearances, is either totally indifferent or definitely hostile to it’. It seemed ‘incredible that the universe can have been designed primarily to produce life like our own; had it been so, surely we have might expected to find a a better proportion between the magnitude of the mechanism and the amount of the product.The title of the passage can be:

Choose the word most similar in meaning to the capitalized one:AMAZEMENT:

Complete the sentence by choosing the most appropriate option, from the given lettered choices (A to E) below:The tree must ______ planted over fifty years ago.

Choose the lettered word or phrase that is most nearly opposite in meaning to the word in capital letters:SWIFT:

Choose the word most similar in meaning to the capitalized one:MEDITATIVE:

Choose the lettered word or phrase that is most nearly opposite in meaning to the word in capital letters:DISTRESS:

Complete the sentence by choosing the most appropriate option, from the given lettered choices (A to E) below:It is quite ______ for poor people to be happier than rich people.