Which of the following statements is true about enzymes?
a. they are used up in the reactions they catalyse.
b. allosteric inhibitors bind to the active site.
c. they lower the energy of activation for a reaction.
d. they supply the energy of activation for a reaction.

Many organs are involved in the processes of keeping the blood and the body clean. when poisonous or harmful substances are in the blood, they are absorbed by the and released in a less harmful form. when wastes are present in the blood, they are filtered out and removed from the body by the

Which statement about the immune system is false? a. lymphocytes reduce inflammation, b. b cells remember specific pathogens. c. most white blood cells kill bacteria d. white blood cells are made in lymph nodes.

The image below shows a weather service map. which details best describe this map? check all that apply