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.
pH affect enzyme activity. . it leads to alteration in the shape of the enzyme.is known as the optimum pH. the pH level may also affect the charge properties and shape of the substrate.This is graphically illustrated in Figure 2.the point where the enzyme is most active.H affect enzyme activity. . it leads to alteration in the shape of the enzyme.is known as the optimum pH. the pH level may also affect the charge properties and shape of the substrate.