Enzymes are ? a. proteins, b. substrate specific c. work at optimum PH d. All of above?

All of the above. They're a complex protein compound. An enzyme works on a specific substrate only. High or low pH can inhibit their action, or denature them.

d. All of above.

d- all of the above Enzymes are proteins which act only on specific things & they need a suitable PH to be optimum

all of the above because enzymes are substrate specific and all enzymes are proteins and they work at optimum ph, eg pepsin works in acidic medium while trypsin works in alkaline medium.

a. protiens Atleast they are protiens

ALL OF THE ABOVE

All of the Above.. Enzymes are proteins that catalyze (i.e., increase the rates of) chemical reactions. In enzymatic reactions, the molecules at the beginning of the process are called substrates, and the enzyme converts them into different molecules, called the products. Almost all processes in a biological cell need enzymes to occur at significant rates. Since enzymes are selective for their substrates and speed up only a few reactions from among many possibilities, the set of enzymes made in a cell determines which metabolic pathways occur in that cell.

enzymes are proteins.they works as key lock type function .it increase chemical reaction.

Enzymes are proteins that catalyze [increase the rates of] chemical reactions.