Diffusion, is movement of ions, atoms or molecules of solutes, liquids or gases from their region of ________ concentration to a region of their lower _______ till equilibrium is attained.

Diffusion of gases occurs in the alveolar region only and not in the other parts of respiratory system why?

A uniform magnetic field of 1.5 T exists in a cylindrical region of radius 10.0 cm, its direction parallel to the axis along east to west. A wire carrying current of 7.0 A in the north to south direction passes through this region. What is the magnitude and direction of the force on the wire. If, the wire in the N - S direction is lowered from the axis by a distance of 6.0 cm ?

The pH of rain water collected in a certain region of Maharashtra on particular day was 5.1. Calculate the H+ ion concentration of the rain water and its percent dissodation.

Given below are four statements pertaining to separation of DNA fragments using gel electrophoresis. Identify the incorrect statements. (i) DNA is negatively charged molecule and so it is loaded on gel towards the Anode terminal. (ii) DNA fragments travel along the surface of the gel whose concentration does not affect movement of DNA. (iii) Smaller the size of DNA fragment, larger is the distance it travels through it. (iv) Pure DNA can be visualized directly by exposing to UV radiation. Choose correct answer from the options given below :