List of top Biology Questions

A RBC and a plant cell (with thick cell wall) are placed in distilled water. The solute concentration is the same in both the cells . What changes would be observed in them
Nosema bombycis which causes pebrine in silk worms is a
The characteristic that is shared by urea, uric acid and ammonia is/are A. They arc nitrogenous wastes B. They all need very large amount of water for excretion C. They are all equally toxic D. They are produced in the kidneys
Damage to thymus in a child may lead to
Most of the endangered species are the victims of
Transpiration facilitates
Match the names of the economically important plants (or their products) listed in Column-I with the families to which they belong given in column-II. Choose the answer which gives the correct combination of alphabets of the two columns : Column-I - Column II A. Sunflower - p. Acanthaceae B. Tulsi - Composite C.Cofee - r. Labiatae D.Vasaka - s. Rubiaceae - t Euphorbiaceae
The respiratory quotient during cellular respiration would depend on
The agents which are known to cause CJD are
The diagram of the section of a maize grain is given below. Identify the parts labelled A. B. C and D.
$1^{st}$ polar body is formed at which stage of oogenesis?
A cell when kept in sugar solution, gets dehydrated/reduced in size. Then the solution is
In the case of peppered moth (Biston betularia) the black-coloured form became dominant over the light-coloured form in England during industrial revolution. This is an example of
A dominant gametophytic phase alternated by multicellular dependent sporophytic phase is represented by
Which is not part of glomerular ultrafiltrate ?
Which of the following is a symbiotic nitrogen fixer?
Which of the following prevents the conversion of prothrombin to thrombin in an undamaged blood vessel ?
Lack of pulmonary surfactant produces

The chemical nature of hormones secreted by \(\alpha \,and\,\beta\) cells of pancreas is

Which one of the following are intracellular obligate parasites?
Diabetes mellitus is caused due to the deficiency of
The least porous soil among the following is a
Macrophages are modified
In which region of the interphase chromosome does transcription take place ?
Recombination between homologous chromosomes is completed by the end of