Identify the types of cell junctions that help to stop the leakage of the substances across a tissue and facilitation of communication with neighbouring cells via rapid transfer of ions and molecules.

Match the following joints with the bones involved

\((a)\) Gliding joint	\((i)\) Between carpal and metacarpal of thumb
\((b)\) Hinge joint	\((ii)\) Between Atlas and Axis
\((c)\) Pivot joint	\((iii)\) Between the carpals
\((d)\) Saddle joint	\((iv)\) Between Humerus and Ulna.

Select the correct option from the following

In light reaction, plastoquinone facilitates the transfer of electrons from 

Which of the following is not a product of light reaction of photosynthesis?

Which is the "Only enzyme" that has "Capability" to catalyse Initiation, Elongation and Termination in the process of transcription in prokaryotes?

Which one of the following is not the function of placenta?

Pyruvate dehydrogenase activity during aerobic respiration requires

Which is the particular type of drug that is obtained from the plant whose one flowering branch is shown here?

Higher yield of NO in
\(\text N _2(\text g)+ \text O _2(\text g) \rightleftharpoons 2 \text{NO} (\text g)\) can be obtained at
[\(\Delta \text H\) of the reaction \(=+180.7 \text{kJ mol} ^{-1}\)]
A. higher temperature
B. lower temperature
C. higher concentration of \(\text N _2\)
D. higher concentration of \(\text O _2\)
Choose the correct answer from the options given below :

The highest number of helium atoms is in

The organization which publishes the Red list of species is

The following solutions were prepared by dissolving \(10\, \mathrm{~g}\) of glucose \(\left(\mathrm{C}_{6} \mathrm{H}_{12} \mathrm{O}_{6}\right)\) in \(250 \,\mathrm{ml}\) of water \(\left(\mathrm{P}_{1}\right)\), \(10\, \mathrm{~g}\) of urea \(\left(\mathrm{CH}_{4} \mathrm{~N}_{2} \mathrm{O}\right)\) in \(250\, \mathrm{ml}\) of water \(\left(\mathrm{P}_{2}\right)\) and \(10\, \mathrm{~g}\) of sucrose \(\left(\mathrm{C}_{12} \mathrm{H}_{22} \mathrm{O}_{11}\right)\) in \(250\, \mathrm{ml}\) of water \(\left(\mathrm{P}_{3}\right)\). The right option for the decreasing order of osmotic pressure of these solutions is :

A body of mass \(m \) is attached to the lower end of a spring whose upper end is fixed. The spring has negligible mass. When the mass \(m\) is slightly pulled down and released , it oscillates with a time period of \(3\,s\) . When the mass \(m\) is increased by \(1\,kg\) , the time period of oscillations becomes \(5\,s\) . The value of \(m\) in \(kg\) is