Which statement about enzymes is true?
A)An enzyme functions to increase the activation energy in a reaction.
B)Enzymes are proteins that function as catalysts in nonliving things.
C)Each enzyme can catalyze many different biochemical reactions.
D)Enzymes and substrates fit together like a lock and key.

Which set of characteristics best describes sedimentary rock? a) largest type of rock, made of organic matter, hardest type of rock b) often contains layers, forms near sources of water, contains fossils c) least abundant type of rock, made of other rocks, made mostly of minerals d) most abundant type in earth's crust, made of magma/lava, contains no fossils