AIPMT 2011
Previous Year Questions

Which of the following is not a fat soluble vitamin?

Which of the statements about "Denaturation" given below are correct? Statements: (a) Denaturation of proteins causes loss of secondary and tertiary structures of the protein. (b) Denaturation leads to the conversion of double strand of DNA into single strand. (c) Denaturation affects primary structure which gets distorted.

The technique called gamete intrafallopian transfer (GIFT) is recommended for those females:

Which one of the following is a possibility for most of us in regard to breathing, by making a conscious effort?

Bacillus thuringiensis forms protein crystals which contain insecticidal protein.

Which one of the following pairs is wrongly matched while the remaining three are correct?

Which one of the following diagrams represents the placentation in Dianthus?

Which one of the following statements is totally wrong about the occurrence of notochord, while the others are correct?

Which one of the following animals may occupy more than one trophic level in the same ecosystem at the same time?

Both, hydrarch and xerarch successions lead to:

What happens during fertilisation in humans after many sperms reach close to the ovum?

About which day in a normal human menstrual cycle does rapid secretion of LH (popularly called LH-surge) normally occur?

The cells lining the blood vessels belong to the category of:

The pathogen Microsporum responsible for ringworm disease in humans belongs to the same Kingdom of organisms as that of:

The figure below shows the structure of a mitochondrion with its four parts labeled (A), (B), (C) and (D). Select the part correctly matched with its function.

Read the following statement having two blanks (A and B): "A drug used for ______ (A) ______ patients is obtained from a species of the organism ______ (B) ______." The one correct option for the two blanks is:

Silencing of mRNA has been used in producing transgenic plants resistant to:

At metaphase, chromosomes are attached to the spindle fibres by their:

Consider the following statements (A-D) about organic farming: (A) Utilises genetically modified crops like Bt cotton (B) Uses only naturally produced inputs like compost (C) Does not use pesticides and urea (D) Produces vegetables rich in vitamins and minerals Which of the above statements are correct?

One of the constituents of the pancreatic juice while poured into the duodenum in humans, is:

Frogs differ from humans in possessing:

Which one of the following options gives the correct matching of a disease with its causative organism and mode of infection?

Function of companion cells is:

Test cross in plants or in Drosophila involves crossing:

Some vascular bundles are described as open because these:

In mitochondria, protons accumulate in the:

The breakdown of detritus into smaller particles by earthworm is a process called:

Whorled, simple leaves with reticulate venation are present in:

Sweet potato is homologous to:

The unequivocal proof of DNA as the genetic material came from the studies on a:

Consider the following four statements whether they are correct or wrong: (A) The sporophyte in liverworts is more elaborate than that in mosses (B) Salvinia is heterosporous (C) The life-cycle in all seed-bearing plants is diplontic (D) In Pinus male and female cones are borne on different trees Which of the following combinations is correct?

Consider the following four statements (A-D) related to the common frog Rana tigrina, and select the correct option stating which ones are true (T) and which ones are false (F). (A) On dry land it would die due to lack of $O_2$ if its mouth is forcibly kept closed for a few days. (B) It has four-chambered heart. (C) On dry land it turns uricotelic from ureotelic. (D) Its life-history is carried out in pond water.

In Kranz anatomy, the bundle sheath cells have:

Given below is the ECG of a normal human. Which one of its components is correctly interpreted below?

Which one of the following structures in Pheretima is correctly matched with its function?

Selaginella and Salvinia are considered to represent a significant step toward evolution of seed habit because:

Bulk of carbon dioxide $CO_2$ released from body tissues into the blood is present as:

In angiosperms, functional megaspore develops into:

Consider the following statements (A)-(D) each with one or two blanks. (A) Bears go into __(1)__ during winter to __(2)__ cold weather. (B) A conical age pyramid with a broad base represents __(3)__ human population. (C) A wasp pollinating a fig flower is an example of __(4)__. (D) An area with high levels of species richness is known as __(5)__. Which one of the following options gives the correct fill ups for the respective blank numbers from (1) to (5) in the statements?

What is common between vegetative reproduction and apomixis?

Common cold is not cured by antibiotics because it is:

Which one of the following is not an essential mineral element for plants while the remaining three are?

Biodiversity of a geographical region represents:

Which one of the following is not considered as a part of the endomembrane system?

Which one of the following correctly represents the normal adult human dental formula?

Select the correct statement with respect to diseases and immunisation:

The figure shows four animals (a), (b), (c) and (d). Select the correct answer with respect to a common characteristic of two of these animals.

In history of biology, human genome project led to the development of:

Which one of the following conditions of the zygotic cell would lead to the birth of a normal human female child?

Which one of the following is essential for photolysis of water?

Which one of the following techniques made it possible to genetically engineer living organisms?

Ureters act as urogenital ducts in:

The type of muscles present in our:

Read the following four statements (A-D) about certain mistakes in two of them: (A) The first transgenic buffalo, Rosie produced milk which was human alpha-lactalbumin enriched. (B) Restriction enzymes are used in isolation of DNA from other macro-molecules. (C) Downstream processing is one of the steps of R-DNA technology. (D) Disarmed pathogen vectors are also used in transfer of R-DNA into the host. Which are the two statements having mistakes?

The 24 hour (diurnal) rhythm of our body such as the sleep-wake cycle is regulated by the hormone:

Guttation is the result of:

Examine the figure given below and select the right option giving all the four parts (a, b, c and d) correctly identified.

Three of the following pairs of the human skeletal parts are correctly matched with their respective inclusive skeletal category and one pair is not matched. Identify the non-matching pair.

Which one of the following aspects is an exclusive characteristic of living things?

Which one of the following is a wrong matching of a microbe and its industrial product, while the remaining are correct?

The logistic population growth is expressed by the equation:

Which has the maximum number of molecules among the following?

The half life of a substance in a certain enzyme-catalysed reaction is 138 s. The time required for the concentration of the substance to fall from 1.28 mg L$^{-1}$ to 0.04 mg L$^{-1}$ is:

Which of the following compounds undergoes nucleophilic substitution reaction most easily?

Which of the following statements is incorrect?

A 0.1 molal aqueous solution of a weak acid is 30% ionised. If $K_f$ for water is $1.86^\circ$ C/m, the freezing point of the solution will be:

The rate of the reaction $$2N_2O_5 \rightarrow 4NO_2 + O_2$$ can be written in three ways: $$-\frac{d[N_2O_5]}{dt} = k[N_2O_5]$$ $$\frac{d[N_2O]}{dt} = k'[N_2O_5]$$ $$\frac{d[O_2]}{dt} = k''[N_2O_5]$$ The relationship between k and k' and between k and k'' are:

Which of the following carbonyls will have the strongest C$-$O bond?

The order of reactivity of phenyl magnesium bromide (PhMgBr) with the following compounds is:

The IUPAC name of the following compound is:

According to the Bohr Theory, which of the following transitions in the hydrogen atom will give rise to the least energetic photon?

A solid compound XY has NaCl structure. If the radius of the cation is 100 pm, the radius of the anion $(Y^-)$ will be:

Consider the following processes:

Match the compounds given in List-I with List-II and select the suitable option using the code given below:

Which of the following compounds is most basic?

Which of the following structures is the most preferred and hence of lowest energy for $SO_3$?

A solution contains $Fe^{2+}$, $Fe^{3+}$ and $I^-$ ions. This solution was treated with iodine at $35^\circ C$. $E^\circ$ for $Fe^{3+}/Fe^{2+}$ is $+0.77\,V$ and $E^\circ$ for $I_2/2I^-$ = 0.536 V. The favourable redox reaction is:

What is the value of electron gain enthalpy of $Na^+$ if the ionisation enthalpy of Na is $5.1\,eV$?

The unit of rate constant for a zero order reaction is:

In qualitative analysis, the metals of Group I can be separated from other ions by precipitating them as chloride salts. A solution initially contains $Ag^+$ and $Pb^{2+}$ at a concentration of $0.10\,M$. Aqueous HCl is added to this solution until the $Cl^-$ concentration is $0.10\,M$. What will be the concentrations of $Ag^+$ and $Pb^{2+}$ at equilibrium? Given: $$K_{sp}(AgCl)=1.8\times10^{-10}$$ $$K_{sp}(PbCl_2)=1.7\times10^{-5}$$

A bubble of air is underwater at temperature $15^\circ C$ and pressure $1.5\,bar$. If the bubble rises to the surface where the temperature is $25^\circ C$ and the pressure is $1.0\,bar$, what will happen to the volume of the bubble?

Match List-I with List-II for the compositions of substances and select the correct answer using the code given below:

The pairs of species of oxygen and their magnetic behaviours are noted below. Which of the following presents the correct description?

Consider the reactions: The mechanisms of reactions (i) and (ii) are respectively:

Which of the following complex compounds will exhibit highest paramagnetic behaviour? (Atomic numbers: Ti = 22, Cr = 24, Co = 27, Zn = 30)

200 mL of an aqueous solution of a protein contains its 1.26 g. The osmotic pressure of this solution at 300 K is found to be $2.57 \times 10^{-3}$ bar. The molar mass of protein will be (R = 0.083 L bar mol$^{-1}$ K$^{-1}$):

Which of the following oxide is amphoteric?

The following reactions take place in the blast furnace in the preparation of impure iron. Identify the reaction pertaining to the formation of the slag.

An organic compound 'A' on treatment with NH$_3$ gives 'B' which on heating gives 'C'. 'C' when treated with Br$_2$ in the presence of KOH produces ethylamine. Compound 'A' is:

"Good ozone" is found in the:

Two identical piano wires kept under the same tension T have a fundamental frequency of 600 Hz. The fractional increase in the tension of one of the wires which would lead to occurrence of 6 beats/second when both the wires oscillate together would be:

In the following figure, the diodes which are forward biased, are:

The threshold frequency for a photosensitive metal is 3.3 × 10¹⁴ Hz. If light of frequency 8.2 × 10¹⁴ Hz is incident on this metal, the cut-off voltage for the photoelectric emission is nearly:

A galvanometer of resistance G is shunted by a resistance S ohm. To keep the main current in the circuit unchanged, the resistance to be put in series with the galvanometer is:

A square loop, carrying a steady current I, is placed in a horizontal plane near a long straight conductor carrying a steady current I₁ at a distance d from the conductor as shown in figure. The loop will experience:

A thermocouple of negligible resistance produces an e.m.f. of 40 μV/°C in the linear range of temperature. A galvanometer of resistance 10 ohm whose sensitivity is 1 μA/division, is employed with the thermocouple. The smallest value of temperature difference that can be detected by the system will be: