Activation of enzymes and other dynamic molecules: Most enzymes shuttle between conformational states that are catalytically active versus inactive, on versus off. Many hormones affect their target cells by inducing such transitions, usually causing an activation of one of more enzymes. Because enzymes are catalytic and often serve to activate additional enzymes, a seemingly small change induced by hormone-receptor binding can lead to widespread consequences within the cell.
Shanghai Weather in January. Weather: Shanghai's severe winter is at its peak in January, with an average temperature of around 2 Â°C (36 Â°F). Don't be fooled by the number, as the temperate is actually freezing because of the wind and dampness. The bone-piercing cold drives most travelers away except for the most dedicated.
Shanghai's winter months, December, January and February, are decidedly cool, with daily highs of around 4-6Â°C and overnight temperatures which can fall below freezing. Snow is quite rare, falling for only 1 or 2 days a year, but it can feel bitterly cold when winds blow from Siberia.utumn in a popular time for tourists visiting Shanghai, as the weather is much more comfortable-however, it's also the peak time for business travel, so hotels tend to be more expensive and the city can be crowded.