AIPMT 2007
Previous Year Questions

Write the location and function of Cytoskeleton.

Write the location and function of Phytol chain.

Write the location and function of Synergid.

Write the location and function of Sieve tube element.

Write the location and function of Centromere.

What is shown in diagram? What are P and Q?

Tell whether the diagram is T$_1$-phage or T$_2$-phage. What are P and Q?

Which type of ovule is shown in diagram? Give one reason.

What is the type of flower shown in diagram? Give examples.

Which type of aestivation is shown in diagram? Give examples.

Write down the type of placentation, inflorescence and fruit of Pea.

Write down the type of placentation, inflorescence and fruit of Coriander.

Write down the type of placentation, inflorescence and fruit of Wheat.

Write down the type of placentation, inflorescence and fruit of Sunflower.

Write down the type of placentation, inflorescence and fruit of Mustard.

Differentiate between Culm and Caudex (Give one important difference).

Differentiate between Slime moulds and Fungi (Give one important difference).

Differentiate between Cyathium and Hypanthodium (Give one important difference).

Differentiate between Biological magnification and Eutrophication (Give one important difference).

Differentiate between White rust and Brown rust (Give one important difference).

Match the column-I and Column-II :

Fill in the blanks with suitable words given in boxes: (a) Rhizophora has both _______________________and _________________ (b) Aquatic plants are ______________________(Pteridophyte) and _____________________ (Angiosperm) (c) Plant bearing both male and female flowers is called______________and the pollination between different flowers of the same plant is called_______________. (d) ____________has ______________.

Give any two conditions for seed habit.

Among the following pairs, which one shows the tendency of seed habit?

Suggest three ways to break seed dormancy.

Mutation can be defined as __________ variation.

Mutation leads to evolution of __________ of a gene.

Genes expressed only in homozygous state are __________.

When both alleles of a gene are expressed it is __________.

Gene, which is most frequent is __________ type.

Who discovered photoperiodism?

Select one SDP and one LDP from the following plants: Chrysanthemum, Rice, Spinach, Barley, Radish.

Who gave the term 'Phytochrome'? Give one specific feature of phytochrome.

Match the Column-I and Column-II

Differentiate between Habitat and Niche.

Differentiate between Flora and Vegetation.

Apart from CO₂, name other greenhouse gases.

What is the type of movement of twiner and opening of flower?

Three groups of baby mice were used in a growth experiment. (a) Kept on complete diet (b) Fed basal diet without nutrient to be tested (c) Basal diet + carotene by feeding carrots. Identify curves a, b and c.

Which animal is different from the rest of the animals?

How many of these animals are poisonous and to which class do they belong?

Which animals belong to the same class?

Which animals are the only representatives of their respective phyla in the given list?

Which of the following have three ear ossicles? Name the ossicles in the order of sound transmission.

Identify the type of population growth represented by Age-Sex pyramid (a).

Identify the type of population growth represented by Age-Sex pyramid (b).

Refer the following diagram: (a) What kind of reflex is it? (b) Where is it striking? (c) List the errors in the above diagram?

Nictitating membrane and Vermiform appendix are examples of which type of organs?

Define vestigial organs.

Out of coccyx, mammary glands, muscles of external ear and opacity of eye due to cataract, which can be categorised in the same category?

Refer diagram. Write the functions of parts (1) and (2).

Refer diagram. Write the functions of parts (1) and (2).

In photorespiration, RuBP is oxidized to form glycolate and glycerate. Which of the following flow diagrams correctly represents the photorespiratory (PCO) cycle involving chloroplasts, peroxisomes and mitochondria?

Two silver rods are dipped separately in 1 M HCl and 1 M HNO₃. In which of the two acids will the silver rod dissolve under standard conditions

A 0.1 M acetic acid solution ionizes to 1.2%. What is the value of Ka?

Why is NH₃ more soluble in water than PH₃?

Why does BH₃ dimerize whereas BF₃ does not?

In the complex K[PtCl₃(C₂H₄)], has 3 chlorine atoms bonded to platinum. Why is the chlorine atom lying opposite to ethene have higher bond length?

An electron in which orbit of lithium will have the same energy as an electron in the second orbit of hydrogen?

Also find the value and unit of the rate constant from the data given above.

For a hydrogen atom, the frequency is given by ν = 3.3 × 10¹⁵[(1/2²) − (1/n²)]. If the wavelength of the emitted radiation is 6600 Å, what is the value of n?

Cyclohexanone oxime undergoes Beckmann rearrangement to form compound A, which on polymerization gives Nylon-6. Identify compound A.

Which of the following compounds is optically active?

Identify the reagent required for the conversion:

Which reagent is used to convert

An alkene C₄H₈ reacts with HBr both in the presence and absence of peroxides to give the same product. Identify the alkene.

An alcohol having molecular formula C₄H₁₀O is produced on hydration of an alkene with H₂O/H₂SO₄ and is not resolvable into optical isomers. Identify the compound.

The amino acids H₂N-(CH₂)₅-CH(NH₂)-COOH (lysine) and H₂N-CH(COOH)-(CH₂)₃-COOH (glutamic acid) can form how many different dipeptides?

Why does alanine migrate towards the cathode when pH is less than its isoelectric point and towards the anode when pH is greater than its isoelectric point?

Which of the following reacts more readily with Br₂ in CS₂ and why?

Why does 1-butyne give a sodium salt with NaNH₂, whereas 2-butyne does not?

Draw the structures for DNA purines?

For a 0.5 M H₂SO₃ solution, Kₐ₁ = 1.8 × 10⁻² and Kₐ₂ = 8.3 × 10⁻⁵. Find the concentrations of H⁺, HSO₃⁻ and SO₃²⁻.

N₂O₄ dissociates according to N₂O₄(g) ⇌ 2NO₂(g) with degree of dissociation α = 0.4. Establish the relation between Kχ and Kp and calculate Kp if the total pressure is 1 atm.

One mole of N₂ and four moles of H₂ react to form NH₃ in a 20 L vessel. Ten litres of water are then added and the vessel is shaken thoroughly. What is the pressure of the residual gases assuming complete absorption of NH₃ by water?

Why is F₂ more reactive than Cl₂?

Why is CrO₄²⁻ a stronger oxidizing agent than MoO₄²⁻?

Out of (SiH₃)₂O and (CH₃)₂O, which is more basic and why?

The empirical formula of an insoluble compound is PtCl₂·(NH₃)₂. On treatment with AgNO₃ it gives [Pt(NH₃)₄]Cl₂ and Ag₂[PtCl₄]. What is the molecular formula of the compound?

Out of trimethylamine (N(CH₃)₃) and triethylphosphine (P(C₂H₅)₃), which has the higher dipole moment?

Why do PO₄³⁻ ions exist whereas NO₄³⁻ ions do not?

Why is B₂ paramagnetic whereas C₂ is diamagnetic?

For octahedral complexes, explain the spin magnetic moments acquired by d⁵ and d⁶ metal ions when Δ₀ > P (strong-field) and Δ₀ < P (weak-field).

How many photons of wavelength 439 nm should strike on a perfectly reflecting surface in 1 second so that it may exert a force of 10 N?

Can water be boiled without heating?

Equation for two waves is given as y₁ = a sin(ωt + φ₁), y₂ = a sin(ωt + φ₂). If amplitude and time period of resultant wave do not change, then calculate (φ₁ − φ₂).

A solid sphere of radius a having charge q is placed inside a spherical shell of inner radius r and outer radius R. Find the potential at distance x, where r < x < R.

For a monoatomic ideal gas, the ratio of specific heats γ is equal to:

The logic circuit shown below produces output Y. Determine the truth table and identify the equivalent logic operation.

Which of the following is a correct difference between nuclear force and Coulomb force?

An airplane is moving horizontally with speed 100 m/s at a height of 2000 m from the ground. A small object is detached from it and strikes the ground. Calculate the angle from the vertical with which it strikes the ground.

Which of the following quantities have the same dimensional formula?

A uniform rod is hinged at one end as shown in the figure. When the support is withdrawn, what is the acceleration of the center of mass immediately after release?

Two stretched wires each produce a frequency of 500 Hz. By what percentage should the tension in one wire be increased so that 5 beats per second are heard?

Find the force on the conductor carrying current i as shown in the figure.

A conducting cone is given charge q. How do the charge density and electric potential vary at different points of the cone?

When 4 A current flows through a battery from positive to negative terminal, the terminal potential difference is 12 V. When 2 A current passes from negative to positive terminal of the battery, the terminal potential difference is 9 V. Calculate the emf and internal resistance of the battery.

A pulley of radius 20 cm and moment of inertia 0.32 kg·m² is used to hang a 2 kg mass with a massless string. If the load is released from rest, calculate the acceleration of the block.

A capacitor of capacitance 6 μF is charged by a 6 V battery. It is then connected to an inductor of 5 mH. Find the current in the inductor when one-third of the total energy is magnetic.

An object is thrown vertically upward with some speed. It crosses two points p, q which are separated by h metre. If tₚ is the time between p and highest point and coming back, and t$_q$ is the time between q and highest point and coming back, relate acceleration due to gravity g, tₚ, t$_q$ and h.

Two coils m and n having 10 turns and 15 turns respectively are placed close to each other. When 2 A current is passing through coil m, the flux linked in coil n is 1.8 × 10⁻⁴ Wb per turn. If 3 A current is passed through coil n, calculate the flux linked per turn of coil m.

A string having tension 360 N and mass per unit length 4 × 10⁻³ kg/m produces two consecutive resonant frequencies with a tuning fork, which are 375 Hz and 450 Hz. Find the mass of the string.

In photoelectric effect, a photon of wavelength 3300 Å is incident on a metal surface of work function 2.5 eV. The emitted electrons enter a transverse magnetic field of 6.7 × 10⁻⁶ T and move in a circular path of radius 50 cm. Calculate the charge of the electron from the given data.

If the temperature and magnetic field applied across a paramagnetic substance are both tripled, by how many times will the intensity of magnetization change?