List of top Biology Questions asked in AIIMS

A young drug addict used to show symptoms of depressed brain activity, feeling of calmness, relaxation and drowsiness. Possibly he was taking
Grain colour in wheat is determined by three pairs of polygenes. Following the cross AABBCC (dark colour) x aabbcc (light colour), in $F_2$ generation what proportion of the progeny is likely to resemble either parent?
$C-DNA$ probes are copied from the messenger RNA molecules with the help of
Given below is a representation of a kind of chromosomal mutation. What is the kind of mutation represented?
In Ulothrix meiosis takes place in
Somaclonal variation can be obtained by
Cattle breeds can be improved by superovulation and embryo transplantation. Superovulation in high milk-yielding cows is induced by hormonal injection.
Which one feature is common to leech, cockroach and scorpion?
What is the first step in the Southern Blot technique?
The total number of nitrogenous bases in human genome is estimated to be about
The pollen tube usually enters the embryo sac
Coconut tree is distributed in coastal areas over a large part of the world. Coconut fruit can float and get dispersed over thousands of kilometers before losing viability
Deficiency of sulphur causes chlorosis in plants. Sulphur is a constituent of chlorophyll, proteins and nucleic acids.
Given below is a pedigree chart of a family with five children. It shows the inheritance of attached ear lobes as opposed to the free ones. The squares represent the male individuals and circles the female individuals. Which one of the following conclusions drawn is correct ?
Women who consumed the drug thalidomide for relief from vomiting during early months of pregnancy gave birth to children with
The great barrier reef along the east coast of Australia can be categorised as
From evolutionary point of view, human gestation period is believed to be shortening. One major evolutionary trend in humans has been the larger head undergoing relatively faster growth rate in the foetal stage.
The treatment of snake bite by antivenine is an example of
In which one of the following pairs the two items mean one and the same thing
Both corpus luteum and macula lutea are
Photorespiration in C plants starts from:
Continued consumption of a diet rich in butter, red meat and eggs for a long period may lead to
Azolla is used as a biofertilizer because it
Yeasts such as Saccharomyces cerevisiae are used in baking industry Carbon dioxide produced during fermentation causes bread dough to rise by thermal expansion.
Which one of the following is a sesamoid bone?