AIPMT 2004

The most thoroughly studied of the known
bacteria-plant interactions is the :-

If by radiation all nitrogenase enzyme are inactivated, then there will be no

The following ratio is generally constant for a
given species :-

In a mutational event, when adenine is replaced
by guanine, it is a case of -

Which form of RNA has a structure resembling
clover leaf ?

After a mutation at a genetic locus the character
of an organism changes due to the change in :-

During transcription, if the nucleotide sequence
of the DNA strand that is being coded is
ATACG, then the nucleotide sequence in the
mRNA would be -

Edible part of mango is

Injury to vagus nerve in humans is not likely to affect

In the resting state of the neural membrane, diffusion due to concentration gradients, if allowed, would drive

The maximum growth rate occurs in :-

What is a keystone species ?

In which one of the following habitats does the
diurnal temperature of soil surface vary most ?

In which of the following pairs is the specific
characteristic of a soil not correctly matched ?

Certain characteristic demographic features of
developing countries are -

In C3 plants, the first stable product of photosynthesis during the dark reaction is

Plants adapted to low light intensity have

Cell elongation in internodal regions of the green plants takes place due to

One set of the plant was grown at 12 hours day and 12 hours night period cycles and it flowered while in the other set night phase was interrupted by flash of light and it did not produce flower. Under which one of the following categories ...

Diversification in plant life appeared

Angiosperms have dominated the land flora primarily because of their

A normal woman, whose father was colour-blind
is married to a normal man. The sons would be :-

Lack of independent assortment of two genes A
and B in fruit fly Drosophila is due to :-

The recessive genes located on X-chromosomes
in humans are always-

In a plant, red fruit (R) is dominant over yellow
fruit (r) and tallness (T) is dominant over
shortness (t). If a plant with RRTt genotype is
crossed with a plant that is rrtt

A male human is heterozygous for autosomal
genes A and B and is also hemizygous for
hemophilic gene h. What proportion of his
sperms will be abh :-

One of the parents of a cross has a mutation in
its mitochondria. In that cross, that parent is
taken as a male. During segregation of F2
progenies that mutation is found in -

In oogamy, fertilization involves

In glycolysis, during oxidation electrons are removed by

When a diploid female plant is crossed with a tetraploid male, the ploidy of endosperm cells in the resulting seed is

An ovule which becomes curved so that the nucellus and embryo sac lie at right angles to the funicle is

Anthesis is a phenomenon which refers to

India's wheat yield revolution in the 1960s was
possible primarily due to :-

The technique of obtaining large number of plantlets by tissue culture method is called –

Mast cells of connective tissue contain -

Which one of the following will not form a yellow precipitate on heating with an alkaline solution of iodine?

Which one of the following can be oxidised to the corresponding carbonyl compound?

The \(-\) OH group of an alcohol or the \(-\) COOH group of a carboxylic acid can be replaced by \(-\) Cl using

The correct statement in respect of protein haemoglobin is that it

Number of chiral carbons in \(\beta\)-\(D\)-(+) glucose is

The helical structure of protein is stablised by

Which of the following structures represents the peptide chain?

The hormone that helps in the conversion of glucose to glycogen is

A sequence of how many nucleotides in messenger RNA makes a codon for an amino acid?

H2O is dipolar, whereas BeF2 is not. It is because

In BrF3 molecule, the lone pairs occupy equatorial positions to minimize

In a regular octahedral molecule, MX6 the number of X \(-\) M \(-\) X bonds at 180o is

Among the following, the pair in which the two species are not isostructural is

The rate of a first order reaction is 1.5 \(\times\) 10\(-\)2 mol L\(-\)1 min\(-\)1 at 0.5 M concentration of the reactant. The half-life of the reaction is

Which of the following forms cationic micelles above certain concentration?