Due to increasing air-borne allergens and pollutants, many people in urban areas are suffering from respiratory disorder causing wheezing due to

Which of the following statements are correct with reference to a transcription unit ?
A. A transcription unit in DNA is defined primarily by three regions : promoter, structural gene and terminator.
B. The promoter is said to be located towards the \(5^{\prime}\)-end of the structural gene.
C. The promoter is a DNA sequence that provides binding site for RNA polymerase.
D. The promoter defines the template and coding strands.
E. The terminator is located towards the \(3^{\prime}\)-end of the coding strand and it defines the end of the process of transcription.
Choose the correct answer from the options given below :

Ten E.coli cells with \({ }^{15} N\) - dsDNA are incubated in medium containing \({ }^{14} N\) nucleotide. After 60 minutes, how many E.coli cells will have DNA totally free from \(15\,N\) ?

Which of the following statements is correct in relation to the endocrine system?

Variations caused by mutation, as proposed by Hugo de Vries, are

Which of the following are found in extreme saline conditions?

Melotic division of the secondary oocyte is completed

On heating, some solid substances change from solid to vapour state without passing through liquid state. The technique used for the purification of such solid substances based on the above principle is known as

Melonate inhibits the growth of pathogenic bacteria by inhibiting the activity of

Embryological support for evolution was proposed by

An astronomical refracting telescope will have large angular magnification and high angular resolution, when it has an objective lens of

Light with an average flux of \(20\, W / cm ^{2}\) falls on a non-reflecting surface at normal incidence having surface area \(20\, cm ^{2} .\) The energy recelved by the surface during time span of \(1\) minute is \(............J\)

Which of the following options correctly represents the lung conditions in asthma and emphysema, respectively?