List of practice Questions

In oxidation of oxalic acid by KMn$O_{4}$, the colour of KMn$O_{4}$ disappears slowly at the start of reaction but disappears very fast afterwards. This is an example of

In $p-n-p$ transistor circuit, the collector current is $10\, mA$. If $90\%$ of the holes reach the collector, the emitter and base currents respectively are

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

In oocyte secondary maturation occurs in

In Opuntia, the function of photosynthesis is carried out by

In order to obtain acetaldehyde from calcium acetate, it should be heated with :

In order to prepare acetone from acetyl chloride which of the following reagents can be used ?

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

In $NaCl$ structure,

In nucleotide of a nucleic acids, the sequence is

In metallurgy, flux is a substance used to convert

In mixture of ideal gases, the molecules have the same

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

In man fat is stored in

In man total number of alveoli in both lungs are

In medullated nerve fibres nodes of Ranvier are

In metallurgical processes the flux used for removing acidic impurities is

In leptotene, the chromosomes are

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

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

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

In Kranz anatomy, bundle sheath cells contain

In lake test of $ {Al^{3+}}$ ion, there is formation of coloured floating. It is due to :

In $(i)$ porous wood, vessels are very broad in the $(ii)$ wood and are quite narrow in the $(iii)$ wood. This kind of wood is present in $(iv)$ and it translocates $(v)$ amount of water when required by the plant. Select the correct fill ups for the above paragraph.

In $(i)$ protoxylem lies towards periphery and metaxylem lies towards centre. Such an arrangement of primary xylem is called as $(ii)$.