What type of boundary does the rift valley form?

Which of the following statements is true of enzymes? a)they dont provide an active site for substrates to bind in a reaction b)they act on a specific type of substrate in a reaction c)they unusable after a reaction d)they change shape after a reaction

What type of plant is good for a bioassay and where can i buy it? i only have a month.

The direct energy source that drives atp synthesis during respiratory oxidative phosphorylation is