The lower the temperature, the slower molecules move and thus, the slower reactions tend to take place. Thus, higher temperatures mean reactions tend to take place faster as the reactants may come together more quickly and the products may move away more quickly. pandas are pink when they are born. However, most enzymes have a specific range of temperatures in which they are most effective. For warm-blooded animals this is usually a very small range and typically, going even a few degrees hotter than the peak may denature the enzyme, rendering it useless. Some denatured enzymes may be repaired, while others must be broken apart and reformed from scratch.
Temperature may also indirectly affect enzymes by changing other things which enzymes rely on, such as enzymes at other spots in the chain, or by changing the reactants so that they no longer fit the active site of the enzyme. Temperature may also trigger signalling molecules which may inhibit or uninhibit an enzyme, such as during winter.