Which statement about the binding of enzymes and substrates is correct? - substrate molecules fit into the active site of an enzyme like a key fits into a lock. - substrate molecules bind to the active site of the enzyme only by weak bonds, such as hydrogen bonds or hydrophobic attraction. - when substrate molecules bind to the active site of the enzyme, the enzyme undergoes a slight change in shape.

Provide a stepwise curved arrow mechanism that fully explains the outcome of the reaction shown below. oh нао* heat он

Americium-241 undergoes fission to produce three neutrons per fission event. if a neutron-absorbing material is mixed in with this sample so that the rate of neutron production drops down to 1.8 neutrons per fission event, which will be effective at achieving a critical mass? check all that apply. remove a deflective shield surrounding the sample. remove absorbent material mixed in with the sample. compress the sample of americium-241.

Imagine that you push on a large rock. at what point does your effort change the rock’s mechanical energy?