List of top Biology Questions

In some_____ , the leaf base may become swollen and is called as_____ .

In spiral phyllotaxy, the number of leaves at each node is

In spermatogenesis, the phase of maturation involves

In sickle cell anaemia glutamic acid is replaced by valine. Which one of the following triplets codes for valine ?

In recombinant $DNA$ technology, the term vector refers to

In prokaryotes, the genetic material is

In potato osmometer, which of the following process is involved?

In plants, mosaic formation, leaf rolling and curling, yellowing of plant parts, vein clearing, dwarfing and stunted growth, necrosis etc. are the symptoms of

In plant cell, glycolysis operates in

In ____ placentation, a monocarpellary ovary bears a single longitudinal ovule along the junction of two fused margins.

In Penicillium, the asexual reproduction takes place by

In $pBR322$, tetracycline resistance gene $(tet^R)$ has recognition site for which of the following restriction endonuclease?

In Opuntia, the function of photosynthesis is carried out by

In oocyte secondary maturation occurs in

In most of the higher animals and plants, reproduction and growth are

In most mammals, the testes are located in scrotal sac for

In man total number of alveoli in both lungs are

In man fat is stored in

In medullated nerve fibres nodes of Ranvier are

In mammalian kidneys, Bowman?? capsules or Malpighian corpuscles occur in

In maize, a meiocyte has $20$ chromosomes. What will be the number of chromosomes in its somatic cell?

In lithosere, foliose lichens make the conditions favourable for the growth of

In leptotene, the chromosomes are

In Kranz anatomy, bundle sheath cells contain

In type of inflorescence, main axis terminates in a flower, hence is limited in growth and flowers are borne in succession.