List of top Biology Questions

Vacuole in a plant cell
Keeping in view the 'fluid mosaic model' for the structure of cell membrane, which one of the following statement is correct with respect to the movements of lipids and proteins from one lipid monolayer to the other (described as flipflop movement)?
In germinating seeds fatty acids are degraded exclusively in the
Gel electrophoresis is used for the
According to Central Pollution Control Board (CPCB), which particulate size in diameter (in micrometers) of the air pollutants is responsible for greatest harm to human health?
A lake near a village suffered heavy mortality of fishes within a few days. Which of the following statements could be the correct explanation for this? (i) Lots of urea and phosphate fertilisers were used in the crops in the nearby fields. (ii) The croplands of the village were fertilised fields rich in nitrate and phosphate. (iii) The lake water turned green and stinky. (iv) Phytoplankton populations in the lake declined initially thereby greatly reducing photosynthesis.
Yellowish edges appear in leaves deficient in
Write the present expansion for WWF
Which of the following can NOT be patented ?
Identify the placental hormone cited below
Food plant of Antheraea assama is
Field capacity of the soil includes
For yielding one molecule of glucose the Calvin cycle turns
Larger subunit of the ribosome helps in producing
Egg of frog is
Closing layers of lenticels may show the deposition of
Jute fibres are anatomically ............
The older resin clogged secondary xylem in the central part of the tree trunk and the younger outer secondary xylem which conducts water are __ and __ respectively.
Apocarpous gynoecium and rattle shaped stigma .are characteristic features of which family?
The phyllotaxy is of decussate type in
Albuminous cells are found in .........
Which one is the first heart sound ?
In which layer of the wall of alimentary canal, secretory glands are present ?
Which of the following element is important to maintain structure of immunoglobulin ?
Which of the following plants develop characters of xerophytes ?