Transport proteins multi-pass so that multiple alpha helices can form a hydrophilic pore that is able to diffuse small molecules. If transport proteins were single-passing, the alpha helix would not have a core with a diameter large enough to diffuse solutes.
Multi-pass membrane proteins loop in and out, while single-pass membrane proteins cross the membrane once.
True, temperature and precipitation affect the overall weather and climate of a place.
Acidity or the concentration of hydrogen ions in the solution
The air can be considered polluted once harmful or toxic substances are being released and introduced into the air and can bring many types of diseases or health problems to the living organisms in it. Some actions can be done in order to remedy air pollution and these include: government passing regulatory laws, testing for car emissions and carpooling so there will be less driving.