A keyboard is also used to give commands to the operating system of a computer, such as Windows ' Control-Alt-Delete combination, which brings up a task window or shuts down the machine. A command-line interface is a type of user interface operated entirely through a keyboard, or another device doing the job of one.
How Temperature Affects Enzymes. Higher temperatures tend to speed up the effect of enzyme activity, while lower temperatures decrease the rate of an enzyme reaction. At higher temperatures, more molecules collide, increasing the chance that an enzyme will collide with its substrate.
Why enzyme activity is affected by pH. by Bhav Patel Â· October 10, 2014. Why enzyme activity is affected by pH. A pH is the measure of the concentration of hydrogen ions, H+ with their values ranging from 1 -14. pH 7 is said to be neutral, any value below this is said to be acidic and values above are alkaline.y doing this, it interferes with the binding of the substrate to the active site and it therefore changes the rate of activity of the enzyme â the rate of an enzyme controlled reaction). Every enzyme has their own optimum pHs; the pH where the rate of the enzyme controlled reaction is at its highest.