UHS MDCAT 2011

An association between two organisms benefiting both is called:

In aquatic ecosystem, human activities may accelerate the process of:

Beri Beri is due to:

The natural heat energy trapped underground is:

Which of the following is the lowest level of biological organization with respect to others?

When an electron pair is shared between two atoms:

The first microbe to have the genome completely sequenced which was published on July 28th, 1995 was:

An activated enzyme consisting of polypeptide and a cofactor is known as:

_ forms weak linkages with enzymes and their effect can be neutralized completely or partly by an increase in the concentration of the substrate.

In prokaryotic cell wall, strengthening material is:

The entire cell wall of bacteria is often regarded as a single huge molecule or molecular complex called:

Krebs cycle takes place in:

Chemically, viruses are made up of:

Widespread epidemic disease, influenza is caused by:

When the division of cells is in three planes, the arrangement is known as:

Bacterial ‘death rate’ is equal to ‘birth rate; in:

Trypanosoma is a human parasite causing:

The feeding stage of slime mold is a:

Drug obtained from fungus used for lowing blood cholesterol is:

Fungi store surplus food in the form of:

The ecological role of fungi as decomposers is paralleled only by:

“Vascular S_ystem absent; gametophyte dominant, sporophyte attached to gametophyte; homosporous” are distinguishing characters of:

Which of the following features differentiate angiosperms from gymnosperms?

In Pakistan, the furniture wood is mainly obtained from the members of family:

Which of the following is the exclusive character of mammals?

Overactivity of sympathetic nervous system causes:

Which structures respond when they are stimulated by impulse coming through the motor neuron?

Respiratory centre is located in:

A neurological condition characterised by involuntary tremors, diminished motor activity and rigidity is called:

A type of cell in human testes which produces testosterone is called:

Breakdown of endometrium during menstruation is due to:

Oogonia are produced in the germ cells of:

Which of the following diseases can be prevented through vaccination?

Newly produced cells/individuals which are identical in each other are known as:

Which of the following is a blood borne disease?

The control of pests has traditionally meant regulation by natural enemies, predators, parasites and pathogens. This type of control is known as:

Which of the following organelles is concerned with the cell secretion?

Which of the following contains peptidoglycan cell wall?

The inner membrane of mitochondria is folded to form finger like structure called:

Interior of chloroplast is divided into heterogeneous structure, embedded in the matrix known as:

In which phase of the cell division is the metabolic activity of the nucleus high?

Luteinizing hormone triggers:

Syphilis is a sexually transmitted disease which is caused by:

Muscle is made up of many cells which are referred to as:

The length of myofibril from one Z-band to the next is known as:

Calcium ions released during a muscle fiber contraction attach with:

A muscle condition resulting from the accumulation of lactic acid and ionic imbalance is:

The pigment which stores oxygen in muscles is:

Neurosecretory cells are present in which part of brain:

Which of the following is the function of glucagon hormone?

Addison’s disease is caused due to destruction of:

Which group of hormones is made up of amino acids and their derivatives?

Thymus gland is involved in maturation of:

In passive immunity which of the following component are injected into blood?

Mucous membranes are part of body defense system and they offer:

Immediate protection is obtained from:

The immunity in which T-cells recognize the antigens or micro-organisms is known as;

Oxidative phosphorylation, synthesis of ATP in the presence of oxygen occurs in:

Glycolysis is the breakdown of glucose into two molecules of:

Before entering Krebs’s cycle, the pyruvate is first decarboxylated and oxidized into:

Some electron from the second primary acceptor may pass back to chlorophyll molecules by electron carrier system, yielding ATP. This process is called:

Z-scheme is used for:

The common vectors used in recombinant DNA technology are:

The enzyme used to isolate gene from DNA is:

Which one of the following enzymes is temperature insensitive?

When chromosomes uncoil, the nucleoli are reformed and two nuclei are the two poles of the cell; stage is known as:

Mental retardation, short stature, broad face and squint eyes are the symptoms of:

Chiasmata formation takes place during the process which is known as:

Healing of a wound and repair is the phenomenon which takes place by the process of:

Which one of the following is the main cause of cancer?

The covalent bond formed between two monosaccharides is called:

The bond formed between glucose and fructose form sucrose is:

In an amino acid in which the R-group is H, its name will be:

Fatty acid are the organic compounds containing hydrogen, oxygen and one of the following are:

Liposomes are used in gene therapy against:

Genetically engineered cells are introduced into bone marrow cells in the treatment of:

Which one of the following is depleting and causing thinning of ozone?

The typical environment of a particular organism population community is called:

E_xcessive enrichment of water with nutrients by human activity by which large amount of living organic matter grows is called:

In an ecosystem, mycorrhizae is an example of:

Successive stages of eating and being eaten by which recycling of materials and flow of energy takes place is called:

The sex of individuals of the generation always depends on one of the parents who is:

Which of the following will be hemophilic?

Which of the following is an example of an X-linked recessive trait in humans?

Which trait in human in an example of multiple alleles?

When a gene pair at one locus interacts with another gene at another locus, the interaction is called:

The combination of a pentose sugar with a base result in a compound is known as:

An enzyme and substrate reacts through a special feature or site present in enzyme:

In mass spectrometer, detector or collector measures the:

How many 'Cl' (chlorine) molecules are in two moles of chlorine?

Melting point of water is higher than petrol, because intermolecular forces in water are:

The elements for which the value of ionisation energy is low, can:

The nature of cathode rays in discharge tube:

The ability of an atom in a covalent bond to attract the bonding electrons is called:

The paramagnetic character of a substance is due to:

Lattice energy of an ionic crystal is the enthalpy of:

In Standard Enthalpy of Atomization, heat of the surrounding:

Mole fraction of any compound is the ratio of moles of all components in a:

Molarity is defined as the number of moles of any substance dissolved:

In electrolytic cell, a salt bridge is used in order to:

In all oxidation reactions, atoms of an element in a chemical species lose electrons and increase their:

In 'AgCl' solution, some salt of NaCl is added, 'AgCl' will be precipitated due to:

‘K_a’ for an acid is higher, the stronger is the acid; relate the strength of an acid with ‘pK_a’:

It is experimentally found that a catalyst is used to:

According to collision theory of bimolecular reaction in gas phase, the minimum amount of energy required for an effective collision is known as:

Carbon exists as allotropes, which are different crystalline or molecular forms of the same substance. Graphite and diamond are allotropes of carbon. Diamond is a non-conductor whereas graphite is a good conductor because:

The diagram below is a plot of melting points of elements of second period against their atomic numbers. Lithium and fluorine are placed at the extreme ends of the plot, on the basis of melting points where will you place Carbon among the empty slots on the plot?

When elements of group II-A (alkaline earth metals) are exposed to air, they quickly become coated with a layer of oxide. What is the purpose of this oxide layer?

In silicon dioxide each silicon atom is tetrahedrally bonded to four oxygen atoms and each oxygen atom is bonded to two silicon atoms. The ratio of silicon to oxygen atoms is:

H_ydrogenation of unsaturated oils is done by using:

Pick the correct statement:

In contact process, the catalyst used for the conversion of Sulphur dioxide to Sulphur trioxide is:

The unpolluted natural rainwater is slightly acidic due to the reaction of rain water with:

In the Haber's process for the manufacturing of ammonia, nitrogen is taken from:

In comparison with oxygen gas, a strong triple bond is present between two nitrogen atoms in a molecule and therefore nitrogen gas is:

The compound with an atom, which has unshared pair of electrons is called:

1-chloropropane and 2-chloropropane are isomers of each other, the type of isomerism in these two is called:

Benzene in the presence of AlCl₃ produces acetophenone when reacts with:

The substitution of a '-H' by '-NO₂' group in benzene is called:

When purely alcoholic solution of sodium/potassium hydroxide and halogenoalkanes are reacted an alkene is formed, what is the mechanism of reaction?

The organic compound carbon tetrachloride is used as:

An alcohol is converted to an aldehyde with same number of carbon atoms as that of alcohol in the presence of K₂Cr₂O₇/H₂SO₄ the alcohol is:

Which of the following is a secondary alcohol?

Which enzyme is involved in the fermentation of glucose:

Relative acidic strength of alcohol, phenol, water and carboxylic acid is:

Consider the following reaction:R―CHO + 2[Ag(NH₃)₂]OH → R―COONH₄ + 2Ag + 2NH₃ + H₂O. This reaction represents one of the following tests?

In the below reaction, the nucleophile is:

Which one of the following compounds belongs to the homologous series of aldehydes?

The products of the reaction given below are:CH₃COOH + PCl₅ → ?

CH₃CN + HCl → A + B (in the presence of water)In the reaction given above, A and B are:

Consider the following reaction:CH₃COOH + Mg (metal) → ?What product will form?

The ―NH―CO is called:

Which one of the following is an alpha amino acid?

Which of the following has an amino R-group?

At intermediate value of pH, amino acids form Zwitter ions containing:

When hexane dioic acid is heated with hexamethylene diamine, the compound formed is:

A polymer in which the number of amino acid residue is greater than 100 or molecular mass is greater than 1000, is known as:

Aspartic acid is an acidic amino acid, which has chemical formula:

Glucose and fructose are common examples of:

The reaction between fats and caustic soda is called:

Macromolecules are described as large molecules built up from small repeating units known as:

Polyvinyl chloride is an example of:

Terylene, a polyester is an example of:

The suspected liver carcinogen which also has negative reproduction and developmental effects on humans is:

Peroxyacetyl nitrate is an irritant to human beings and it effects:

Radian is a unit of angular displacement that can also be measured in degrees. How many radians are equal to one degree?

An elevator is moving upwards with constant velocity of ‘v’. What is the weight of a person of a mass ‘m’ inside the elevator during upward motion?

An object having spherical shape of radius ‘r’ experiences a retarding force F from a fluid of coefficient of viscosity ‘η’ when moving through the fluid with speed ‘v’. What is the ratio of retarding force to speed?

When the drag force is equal to the weight of the droplet, the droplet will fall with:

A simple pendulum length ‘L’ with bob of mass ‘m’ is slightly displaced from its mean position so that it string makes an angle ‘θ’ with vertical line as shown in the figure. Then bob of pendulum released. What will be the expression of torque with which the bob starts to move towards the mean position?

The density of blood is:

A monochromatic light of wavelength ‘λ’ is used to produce the diffraction pattern through a single slit of width X. Which one of the following represents the intensity distribution across the screen?

For interference of light waves to take place, the required condition is:

The property of bending of light around an obstacle and spreading of light waves into a geometric shadow of an obstacle is called:

The normal human eye can focus a sharp image of an object on the eye if the object is located at certain distance called:

A source of sound wave emits waves of frequency ‘f’. If ‘v’ is speed of sound waves, then what will be the wavelength of the waves:

The spectrum of a star’s light is measured and the wavelength of one of the lines as the sodium’s line is found to be 589 nm. The same line has the wavelength of 497 nm when observed in the laboratory. This means the star is:

What is the period of the mass-spring system during SHM if the ratio of mass to spring constant is ¼?

The waveform of SHM is given in the figure. At what time/times displacement is equal to zero?

A wire is stretched by a force that causes an extension. The energy is stored in it only when:

Which of the following statements is correct:

Which of the following is the expression of root mean square speed of a gas having n number of molecules contained in the container?

Which of the following is the proper way to study the sinusoidal waveform of the voltage?

The electron gun in a cathode ray oscilloscope contains:

In which of the following, the change in internal energy is more?

Pressure volume graph of two systems 'A' and 'B' are plotted under isothermal and adiabatic conditions. Which of the following observation of graph represents the two systems?

Which of the following curve is an isotherm?

If 2 A current passes through a resistor when connected to a certain battery. If the resistance is replaced by double the resistance, then the current will become:

In a Helium-Neon laser, population inversion of _ atoms is achieved which emits radiations, when they are stimulated to fall at a lower level.

Three resistors each having value 'R' are connected as shown in figure. What is the equivalent resistance between 'X' and 'Y'?

If the number of turns of a solenoid circular coil is doubled, but the current in the coil and radius of the coil remain the same, then what will be the magnetic flux density produced by the coil?

Two long parallel wires Wire 1 and Wire 2 repel each other as shown in the figure. What could be the reasons?

The diagram shows a wire, carrying a current 'I', placed between the poles of a magnet. In which direction does the force on the wire act?

Wavelength of X-rays is the order of:

Laser beam can be used to generate three-dimensional image of object in a process called:

Which of the following is true for Lasers?

Three resistors of resistance R₁, R₂, and R₃ are connected as shown in the figure.The equivalent resistance is:

What is meant by spontaneous emission of electrons in solids?

When electrons lose all their kinetic energy in the first collision, the entire kinetic appears as an X-ray photon of energy:

The characteristic X-ray spectrum is due to:

The ionizing capability of gamma rays is:

The half-life of a radioactive element is:

The transformation of a neutron into a proton in the nucleus gives rise to the emission of:

The ratio of the rate of decay of a parent atom to the number of radioactive nuclei present at that time is equal to:

Which one of the following particles is emitted as a result of the following nuclear reaction?Ra226 → Rn222

Which of the following is used to estimate the circulation of blood in a patient?

For the radiotherapy of a patient, it is required to double the absorbed dose in gray. What step must be taken?

She managed to _ a ticket for the cricket match.

Things have got out of hand; we must take steps to _ the situation.

George Orwell’s Animal Farm is a stinging _ on the Russian revolution.

All the _ and ceremony of the royal wedding was telecast on the national television circuit.

Select the incorrect segment:The patient’s blood analysis shows that there is a big number of amorphous cells which are quiet unidentifiable.

Select the incorrect segment:The police, in their investigation, used coercive measure to get a favorable statement from the accused.

Select the incorrect segment:Your argument is simply abstruse as there is no clarity of thought and coherence in ideas and it also lack vision.

The workers were raising much hue and cry when their demands were turned away.

The disease is uncurable without the judicious use of antibiotics.

The younger sister hopes to emulate her elder sister’s sporting achievement as she is putting up hectic effort.

Select the NEAREST CORRECT MEANING of the given word:

MUSE

Select the NEAREST CORRECT MEANING of the given word: FECKLESS

Select the NEAREST CORRECT MEANING of the given word: MOSAIC

Select the NEAREST CORRECT MEANING of the given word: INSCRUTABLE

Select the NEAREST CORRECT MEANING of the given word: JUXTAPOSE

Select the NEAREST CORRECT MEANING of the given word: LACERATING

Select the NEAREST CORRECT MEANING of the given word: EMPATHY

Select the NEAREST CORRECT MEANING of the given word:

EVANESCENT

Select the NEAREST CORRECT MEANING of the given word:

SIDLE

Select the NEAREST CORRECT MEANING of the given word:DISSONANCE

The authorities have _ that the plane to Beirutwas hijacked over the Indian ocean:

She has let her house fully furnished to a Korean couple:

I have no _ to listen to the budget speech.

Your _ too long you had better go to the hairdresser today: