What stimulates cell division?

a.) stimuli and regulating protein agents stimulate cell division.

b.) scientists do not know what stimulates cell division.

c.) metabolic pathways stimulate cell division.

d.) activators stimulate cell division.

1. environmental factors, such as ph and temperature, can affect the function of an enzyme. a. true b. false 2. which of the following is an organic molecules (ex. vitamins) that an enzyme? a. coenzyme b. product c. active site d. substrate 3. how do enzymes effect the speed of a chemical reaction? a. they speed it up b. they slow it down c. they have no effect on the speed of a reaction 4. during a chemical reaction, an enzyme is used up so that it can only be used one time. a. true b. false 5. which of the following results from a chemical reaction that is catalyzed by an enzymes? a. active site b. product c. substrate d. coenzyme

Explain why phospholipid molecules form a bilayer. (3 marks)

What is the number of phosphates in an atp molecule