A specialised membranous structure in a prokaryotic cell which helps in cell wall formation, DNA replication and respiration is _______.

In China rose the flowers are

Match the following columns and select the correct option

Column \(I\)	Column \(II\)
(\(a\)) Pituitary hormone	(\(i\)) Steroid
(\(b\)) Epinephrine	(\(ii\)) Neuropeptides
(\(c\)) Endorphins	(\(iii\)) Peptides, proteins
(\(d\)) Cortisol	(\(iv\)) Biogenic amines

Which one of the following statements cannot be connected to Predation?

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 :

The production of gametes by the parents, formation of zygotes, the \(\mathrm{F}_{1}\) and \(\mathrm{F}_{2}\) plants, can be understood from a diagram called:

Match List \(- I\) with List \(- II.\)

List \(- I\)	List \(- II\)
\((a)\) Allen's Rule	\((i)\) Kangaroo rat
\((b)\) Physiological adaptation	\((ii)\) Desert lizard
\((c)\) Behavioural adaptation	\((iii)\) Marine fish at depth
\((d)\) Biochemical adaptation	\((iv)\) Polar seal

Choose the correct answer from the options given below. \((a) -(b)- (c)- (d)\)

Match the following enzymes with their functions

\((a)\) Restriction endonuclease	\((i)\) Joins the \(DNA\) fragements
\((b)\) Restriction exonuclease	\((ii)\) Extends primers on genomic \(DNA\) template
\((c)\) \(DNA\) ligase	\((iii)\) Cuts \(DNA\) at specific position
\((d)\) Taq polymerase	\((iv)\) Removes nucleotides from the ends of \(DNA\)

Select the correct option from the following

In half wave rectification, if the input frequency is \(60\,Hz\), then the output frequency would be\(\dots\dots\dots\,Hz\)

Evolution of human appears parallel to the progressive development of brain and language skills. As such, the evolution of individual species in the sequence of their appearance is :

While trying to find out the characteristic of a newly found animal, a researcher did the histology of adult animal and observed a cavity with presence of mesodermal tissue towards the body wall but no mesodermal tissue was observed towards the alimentary canal. What could be the possible coelome of that animal?

If the mass of the bob in a simple pendulum is increased to thrice its original mass and its length is made half its original length, then the new time period of oscillation is \(\frac{x}{2}\) times its original time period. Then the value of \(x\) is:

The \(pH\) of the solution containing \(50\, mL\) each of \(0.10\, M\) sodium acetate and \(0.01\, M\) acetic acid is \(.......\) [Given \(pK _{ a }\) of \(CH _{3} COOH =4.57\) ]