Sindh MCAT NTS 2013 DUHS and JSMU

When a physician elicits the knee-jerk reflex by tapping deep tendons in the knee, the normal response is for the lower leg to swing forward. When this happens:

How many metacarpals are present In the hand?

The diagram shows a simplified nitrogen cycle. Which row shows the correct labels for P, Q, R, and S?

Many scientists believe that one of the following is evolutionary origin of animals, plants and fungi?

Archaeopteryx is a transitional stage between the members of which one of the following pairs?

Which of the following describes the movements involved in breathing out?

When a fetus is in the uterus, what carries oxygen away from the placenta?

In the commercial manufacture of insulin, a human gene is inserted into which one of the following?

The diagram shows a model to demonstrate the mass flow hypothesis of translocation. In a plant, what are the structures W, X, Y, and Z, and what is the direction of the flow of solution along W?

Identify the phylum in which the larvae is bilaterally symmetrical but the adult Is radially symmetrical

Some enzymes require the presence of a non protein molecule to behave catalytically. An enzyme devoid of this molecule is called a:

In the human body, blood circulating from the gut to the heart passes through the:

Which is the incorrectly paired one?

A pure breeding plant with the dominant phenotype of character P and the recessive phenotype of character Q was crossed with another pure breeding plant with the recessive phenotype of character P and the dominant phenotype of Q. The offspring of this cross were crossed with a double homozygous recessive for P and Q and the following results were obtained:22 were phenotypically dominant for P and recessive for Q5 were phenotypically dominant for both P and Q4 were phenotypically recessive for both P and Q24 were phenotypically recessive for P and dominant for QWhich one of the following types of Inheritance is illustrated by these results?

Which vertebrate groups have scaly skin?

The following reaction occurs in the human alimentary canal. What is the enzyme and the product?

The botanical name of gum tree is:

The events shown below occur during different phases of mitosis:  Spiralization of DNA  Hydration of DNA  Centromeres split  Centromeres attach to spindle fibres DNA replicates  Which one of the following correctly identifies each of the phases described?

The diagram represents two liquids, separated by a membrane through which osmosis can occur. What movement of molecules will occur?

The diagram shows the human urinary system.Which substance is not found In the liquid at x In a healthy person?

The diagram shows a cell of an organism formed by reduction division. What is the diploid number for this organism?

Which processes are essential in making nitrogen from dead plant material available to growing plants? ammonification deamination  nitrification  nitrogen fixation

Male and female sea urchins release their sperm and eggs Into the water where fertilization takes place. How can their reproduction be described?

What are the functions of the inter, motor and sensory neurons in a reflex response?

In the Krebs cycle, substrate-level phosphorylation accompanies the formation of:

The floral formula of family Mimosaceae is:

The inhibitor which closely resembles the substrate in its molecular structure and inhibits the enzyme activity by binding to the active site of the enzyme is called

Which of the following is NOT a difference that would allow one to distinguish between a prokaryotic and a eukaryotic cell? Presence or absence of the nucleus Presence or absence of the cell wall Membrane bound versus no membrane bound organelles

Which type of protein structure contains the three dimensional structure?

What substrates are required to add a NO2 group to benzene?

From a mixture of CO2 and H2 gases, CO2 can be separated by passing the mixture through:

Magnesium oxide is used in the making of the lining of blast furnaces. It is extracted from seawater as follows. Aqueous calcium hydroxide is added to seawater.  Ca(OH)2 (aq) + MgCl2 (aq) + Mg(OH)2(s) + CaCl2 (aq) The magnesium hydroxide is then filtered off and roasted.  Which of the following comparisons between calcium and magnesium explains why magnesium hydroxide forms?

When methylbenzene is treated with bromine in the presence of a catalyst, a mixture of two monobromo isomers is formed. What are the structures of these two isomers?

The false statement about lithium is:

Borax exists in nature as:

Which type of isomerism depends on the distribution of carbon atoms on each side of the functional group?

Diamond and Graphite

Which one of the following formulae represents the organic compound formed when methylbenzene is heated under reflux with alkaline potassium manganate (VII) solution and the mixture then acidified?

Alkanes having five to seventeen carbon atoms per molecule are

Which of the following statements are correct about noble gases?

Dissolution of ammonium nitrate in water is an endothermic process. Which of the following graphs shows how the temperature alters as the ammonium nitrate is added to water and then the solution is left at room temperature?

Non-stoichiometric compounds are formed by:

Outer transition elements belong to:

Equal weights of methane and hydrogen are mixed in an empty container at 25°C. The fraction of total pressure exerted by hydrogen is:

Rate = K [N2O5 ] has _____ of reaction.

The amount of energy released by adding an electron in the valence shell is

For a reaction 2A + B ⇌ C + D the active mass of B is kept constant and that of A is tripled. It is observed that the rate of reaction:

If we take 2.2g of CO2, 6.02 x 1021 atoms of nitrogen and 0.03g atoms of sulfur, then the molar ratio of CO2, N and S atoms will be:

Transition elements have coloured compounds because:

The radii of the second orbit of the hydrogen atom calculated from Bohr's model is:

This is is a structure of

Which one of the following molecules has the shortest distance of carbon atoms?

The most dense element is

A system at equilibrium can be disturbed by:

For a multi-electron atom, the highest energy level among the following is

In a double-bonded carbon atom (C=C)

The isomers must have the same:

The internal energy of an object increases in an adiabatic process. Which of the following must be true regarding this process?

An object 4 cm high is located 10 cm from the converging lens, whose focal length is 20 cm. The image that will be formed is:

The half-life of 14C is approximately 5,730 years, while the half-life of 12C is essentially infinite. If the ratio of 14Cto 12C in a certain sample is 25% less than the normal ratio in nature, how old is the sample?

A constant force acting on a body of mass 5 kg changes its speed from 2 m/s to 7 m/s in 10 s the direction of motion of the body remains unchanged. Find the magnitude of the force.

On the ground, the gravitational force on a satellite is W. What is the gravitational force on the satellite when at a height R/50, where R is the radius of the Earth?

A generator of e.m.f. 80 V has an internal resistance of 0.04 Ω. If its terminal voltage is 75 V, determine the current.

If the frequency of a pendulum is four times greater on an unknown planet than it is on Earth, then the gravitational constant on that planet is

A 40 kg block is resting at a height of 5m off the ground. If the block is released and falls to the ground. What is its total energy at a height of 2m? (g= 10 m/s2).

The amount of heat at constant volume is called as:

Which of the following statements is inconsistent with Bohr's set of postulates regarding the hydrogen atom model regarding the emission and absorption of light?

A box of mass m = 6 kg slides with speed v = 4 m/s across a frictionless floor. It explodes into two pieces: one piece, with mass m1 = 2 kg move in the same direction with speed v1 = 8 m/s. Find the velocity of the second piece.

An electric rod of 2000 watts rating boils a certain quantity of water in 10 minutes, the heat which generated for boiling this water is:

Find the work done in moving an object along a straight line from (3,2,−1) to (2,−1,4) in a force field given by F=4i^−3j^​+2k^.

A ball of mass 2 kg travelling at 8 ms-1 strikes a ball of mass 4kg travelling at 2ms-1. Both balls are moving along the same straight line as shown. After collision, both balls move at the same velocity v. What is the magnitude of the velocity V?

A special class of waves that does not need a material medium for their propagation are called

A submarine sends out a sonar signal (sound wave) in a direction directly downward. It takes 2.3 s for the sound wave to travel from the submarine to the ocean bottom and back to the submarine. How high (approx) up from the ocean floor is the submarine? (The speed of sound in water is 1,490 m/s.)

Two resistors R₁ and R₂ may be connected either in series or in parallel across a battery of zero internal resistance. It is required that the joule heating for parallel combination be five times that for series combination. If R₁ = 100Ω, find possible values of R₂.

A rotating wheel of radius 0.5 m has an angular velocity of 5 rad/s at some instant and 10 rad / s after 5 s. Find the angular acceleration of a point on its rim.

In an astronomical telescope, the distance between the objective and the eyepiece is called

Gamma-ray (𝝲) can produce ionization in which of the following way/s?I. It may lose all its energy in a single encounter with the electron of an atom (Photoelectric effect).II. It may lose only a part of its energy in an encounter (Compton effect).III. Very few very high energy 𝝲 ray photons may impinge directly on heavy nuclei, be stopped and annihilated giving rise to electron-positron pairs (The materialization of energy).

What force should be applied on a 10 kg body so that it moves down in a vacuum with an acceleration of 3 m/s2 ? (Take g=9.8 m/s2)

Two blocks, X and Y, of masses m and 2m respectively, are accelerated along a smooth horizontal surface by a force F applied to block X, as shown in the diagram.What is the magnitude of the force exerted by block Y on block X during this acceleration?

A shot leaves a gun at the rate of 160 m/s. Calculate the greatest distance to which it could be projected. (Take g = 10 m/s2).

When the aircraft Concorde is moving in a horizontal plane at a constant speed of 650 ms^-1, its turning circle has a radius of 80 km. What is the ratio of the centripetal force to the weight of the aircraft? (g = 9.8 m/s2)

A nucleus consists of 19 protons and 20 neutrons. The conventional symbol of this nucleus is

A block of mass 50 kg is pulled on a frictionless floor by a force of 210 N directed at 30 degrees to the horizontal. If the block moves 3.0 m, what is the work done on it by the applied force?

The temperature of a body at 100 °C is increased by Δ𝛉 as measured on the Celsius scale. How is this temperature change expressed on the Kelvin scale?

Candela is the luminous intensity, in the perpendicular direction of a surface _________ square meter of a black body at the temperature of freezing platinum under a pressure of 101325 newtons per square meter.

The series limit for the Balmer series of hydrogen spectrum occurs at 3664 A°. Calculate Ionization energy of hydrogen atom.

Questions 9-10 are based on the following passage. However, it must be recognized that science has its limitations. Its methods apply only to those things which can be observed, measured, and treated mathematically. It has nothing to do with values- save those of truth and accuracy. It has nothing to do with happiness, goodness, beauty, courage, adventure, justice, altruism, friendship, love of family, and love of country. Yet all these values enter into a man's conception of what is a good personal life within a good society. Honest and intelligent men can differ profoundly on the nature of these values and their respective degrees of importance. Hence the contrast between the modern world's command of material things and its tragic failure to organize a harmonious world society.According to the paragraph, science applies certain values, which of the following describes these values?

Choose the word most similar in meaning to the capitalized ones. SQUASH:

Identify the word or phrase that needs to be changed for the sentence to be correct: I go by the post office every morning on my way too work.

Complete the sentence by choosing the most appropriate option, from the given choices (A to E) below each.I __________ have to get up early tomorrow morning.

Questions 9-10 are based on the following passage. However, it must be recognized that science has its limitations. Its methods apply only to those things which can be observed, measured, and treated mathematically. It has nothing to do with values- save those of truth and accuracy. It has nothing to do with happiness, goodness, beauty, courage, adventure, justice, altruism, friendship, love of family, and love of country. Yet all these values enter into a man's conception of what is a good personal life within a good society. Honest and intelligent men can differ profoundly on the nature of these values and their respective degrees of importance. Hence the contrast between the modern world's command of material things and its tragic failure to organize a harmonious world society.It can be inferred from the passage that the author thinks

Identify the word or phrase that needs to be changed for the sentence to be correctThe secretary must type these letters before lunch.

Complete the sentences by choosing the most appropriate option, from the given lettered choices (A to E) below each.He says he is a ______, but he can’t play the piano or any other instrument and he can’t sing.

Each problem consists of three statements. Based on the first two statements, the third statement may be true, false, or uncertain.During the past year, Josh saw more movies than Stephen.Stephen saw fewer movies than Darren.Darren saw more movies than Josh.If the first two statements are true, the third statement is: