AIPMT 2005
Previous Year Questions

The cell membranes are mainly composed of:

The main organelle involved in modification and routing of newly synthesized proteins to their destinations is:

There are two opposing views about the origin of modern man. According to one view, Homo erectus in Asia was the ancestor of modern man. A study of variations of DNA however suggested African origin of modern man. What kind of observation on DNA variation could suggest this?

The world's highly prized wool yielding 'Pashmina' breed is:

Grey crescent is the area:

Photosynthesis in C4 plants is relatively less limited by atmospheric CO$_2$ levels because:

At what stage of the cell cycle are histone proteins synthesized in a eukaryotic cell?

There exists a close association between the alga and the fungus within a lichen. The fungus:

For retting of jute, the fermenting microbe used is:

A student wishes to study the cell structure under a light microscope having $10\times$ eyepiece and $45\times$ objective. He should illuminate the object by which one of the following colours of light so as to get the best possible resolution?

The net pressure gradient that causes the fluid to filter out of the glomeruli into the capsule is:

At which latitude does heat gain through insolation approximately equal heat loss through terrestrial radiation?

A man and a woman, who do not show any apparent signs of a certain inherited disease, have seven children (2 daughters and 5 sons). Three of the sons suffer from the given disease but none of the daughters are affected. Which of the following mode of inheritance do you suggest for this disease?

In Ornithine cycle, which of the following wastes are removed from the blood ?

Telomerase is an enzyme which is a:

During transcription holoenzyme RNA polymerase binds to a DNA sequence and the DNA assumes a saddle-like structure at that point. What is that sequence called?

Centromere is required for:

Damage to thymus in a child may lead to:

Prolonged liberal irrigation of agricultural fields is likely to create the problem of:

Chlorophyll in chloroplasts is located in:

Three crops that contribute maximum to global food grain production are:

Genes for cytoplasmic male sterility in plants are generally located in:

Which one of the following hydrolyses internal phosphodiester bonds in a polynucleotide chain?

Match items in Column-I with those in Column-II and select the correct answer.

The name of Norman Borlaug is associated with:

G-6-P dehydrogenase deficiency is associated with haemolysis of:

In which one pair both the plants can be vegetatively propagated by leaf pieces?

According to IUCN Red List what is the status of red panda (Ailurus fulgens)?

Which of the following substances, if introduced in the blood stream, would cause coagulation at the site of its introduction?

E. coli cells with a mutated Z gene of the lac operon cannot grow in medium containing only lactose as the source of energy because:

Top-shaped multiciliate male gametes and the mature seed which bears only one embryo with two cotyledons are characteristic features of:

Production of a human protein in bacteria by genetic engineering is possible because:

From the following statements select the wrong one:

Nucleotide are building blocks of nucleic acids, nucleotide is a composite molecule formed by:

More than 70% of world's freshwater is contained in:

Which one of the following pairs is mismatched?

Which one of the following characters is not typical of the class Mammalia?

Which of the following is the simplest amino acid?

Barophilic prokaryotes:

Auxospores and hormocysts are formed, respectively, by:

Enzymes, vitamins and hormones can be classified into a single category of biological chemicals, because all of these:

Which one of the following phenomena supports Darwin's concept of natural selection in organic evolution?

As compared to a C$_3$ plant, how many additional molecules of ATP are needed for net production of one molecule of hexose sugar by C$_4$ plants?

In a man, abducens nerve is injured. Which one of the following functions will be affected?

An important step in the manufacture of pulp for paper industry from the woody tissues of plants is the:

Protein synthesis in an animal cell occurs:

Which of the following is not true for a species?

One of the most important functions of botanical gardens is that:

The ability of the Venus flytrap to capture insects is due to:

Animals have the innate ability to escape from predation. Examples for the same are given below. Select the incorrect example:

At a particular locus, frequency of 'A' allele is 0.6 and that of 'a' is 0.4. What would be the frequency of heterozygotes in a random mating population at equilibrium?

Which one of the following experiments suggests that simplest living organisms could not have originated spontaneously from non-living matter?

Biodiversity Act of India was passed by the Parliament in the year:

During which stage in the complete oxidation of glucose are the greatest number of ATP molecules formed from ADP?

A woman with normal vision, but whose father was colour blind, marries a colourblind man. Suppose that the fourth child of this couple was a boy. This boy:

Ectophloic siphonostele is found in:

Which of the following represents the edible part of the fruit of litchi?

Carbohydrates, the most abundant biomolecules on earth, are produced by:

Identify the correctly matched pair:

Which of the following is not a hereditary disease?

The deficiencies of micro-nutrients not only affects growth of plants but also vital functions such as photosynthetic and mitochondrial electron flow. Among the list given below, which group of three elements shall affect most, both photosynthetic and mitochondrial electron transport?

de Vries gave his mutation theory on organic evolution while working on:

One of the examples of the action of the autonomous nervous system is:

Which of the following is not used for disinfection of drinking water?

Chemiosmotic theory of ATP synthesis in the chloroplasts and mitochondria is based on:

Parkinson's disease (characterized by tremors and progressive rigidity of limbs) is caused by degeneration of brain neurons that are involved in movement control and make use of neurotransmitter:

All of the following statements concerning the actinomycetous filamentous soil bacterium Frankia are correct except that Frankia:

An acromian process is characteristically found in the:

In a type of apomixis known as adventive embryony, embryos develop directly from the:

Through which cell of the embryo sac does the pollen tube enter the embryo sac?

Epithelial cells of the intestine involved in food absorption have on their surface:

A patient is generally advised to specially consume more meat, lentils, milk and eggs in diet only when he suffers from:

Which one of the following pairs is mismatched?

Which of the following is the relatively most accurate method for dating of fossils?

Which one of the following represents an ovule, where the embryo sac becomes horse-shoe shaped and the funiculus and micropyle are close to each other?

Potometer works on the principle of:

In a woody dicotyledonous tree, which of the following parts will mainly consist of primary tissues?

Which one of the following makes use of RNA as a template to synthesize DNA?

In contrast to annelids the platyhelminths show:

Which of the following statements regarding enzyme inhibition is correct?

Which of the following pairs is correctly matched?

The catalytic efficiency of two different enzymes can be compared by the:

Using imprints from a plate with complete medium and carrying bacterial colonies, you can select streptomycin resistant mutants and prove that such mutations do not originate as adaptation. These imprints need to be used:

Which of the following is generally used for induced mutagenesis in crop plants?

Haemophilia is more commonly seen in human males than in human females because:

A woman with 47 chromosomes due to three copies of chromosome 21 is characterized by:

In order to find out the different types of gametes produced by a pea plant having the genotype AaBb, it should be crossed to a plant with the genotype:

Four healthy people in their twenties got involved in injuries resulting in damage and death of a few cells of the following. Which of the cells are least likely to be replaced by new cells?

Secretin and cholecystokinin are digestive hormones. They are secreted in:

Which of the following unicellular organism has a macro-nucleus for trophic function and one or more micro-nuclei for reproduction?

AIDS is caused by HIV that principally infects:

According to widely accepted 'fluid mosaic model' cell membranes are semi-fluid, where lipids and integral proteins can diffuse randomly. In recent years, this model has been modified in several respects. In this regard, which of the following statements is incorrect?

If mammalian ovum fails to get fertilized, which one of the following is unlikely?

A person is undergoing prolonged fasting. His urine will be found to contain abnormal quantities of:

Why is vivipary an undesirable character for annual crop plants?

Bacillus thuringiensis (Bt) strains have been used for designing novel:

The salivary gland chromosomes in the dipteran larvae are useful in gene mapping because:

Which group of three of the following five statements (A-E) contain all three correct statements regarding beri-beri? A. A crippling disease prevalent among the native population of sub-Sahara Africa. B. A deficiency disease caused by lack of thiamine (vitamin B$_1$). C. A nutritional disorder in infants and young children when the diet is persistently deficient in essential protein. D. Occurs in those countries where the staple diet is polished rice. E. The symptoms are pain from neuritis, paralysis, muscle wasting, progressive oedema, mental deterioration and finally heart failure.

Photosynthetic Active Radiation (PAR) has the following range of wavelengths:

Golden rice is a transgenic crop of the future with the following improved trait:

Which one of the following depresses brain activity and produces feelings of calmness, relaxation and drowsiness?

Which amongst the following is the most stable carbocation?

Products of the following reaction:

At $25^\circ C$, the dissociation constant of a base, $BOH$, is $1.0 \times 10^{-12}$. The concentration of hydroxyl ions in $0.01\,M$ aqueous solution of the base would be:

Which one of the following pairs represents stereoisomerism?

Aniline in a set of reactions yielded a product D. The structure of the product D would be:

The correct order in which the O–O bond length increases in the following is:

The mass of carbon anode consumed (giving only carbon dioxide) in the production of $270\,kg$ of aluminium metal from bauxite by the Hall process is: (Atomic mass of Al = 27)

In a set of reactions, acetic acid yielded a product D. The structure of D would be:

The major organic product formed from the following reaction is:

The number of moles of $KMnO_4$ reduced by one mole of $KI$ in alkaline medium is:

Which of the following molecules has trigonal planar geometry?

The aqueous solution containing which one of the following ions will be colourless? (Atomic no.: $Sc = 21$, $Fe = 26$, $Ti = 22$, $Mn = 25$)

Four successive members of the first row transition elements are listed below with their atomic numbers. Which one of them is expected to have the highest third ionization enthalpy?

Which one of the following compounds is most acidic?

A reaction occurs spontaneously if: