Why enzymes are highly efficient and specific

Why enzymes are specific?

When an enzyme catalyzes a substrate, it only takes a little bit to completely catalyze that substance, which is the principle in experiments, and when catalyzing the liver, catalase has a significantly higher catalytic efficiency than iron ions (producing bubbles faster and more), which proves that the enzyme is highly efficient.

An enzyme usually catalyzes only one substance, for example, amylase only catalyzes starch and has no effect on sucrose.

Why enzymes are specific?

Enzyme specificity refers to the strict selectivity of the enzyme for substrates and their catalytic reactions.

The enzyme has strict selectivity for the substrate it acts on. An enzyme can only act on one substance, or a class of substances with similar molecular structures, to promote a certain chemical reaction and produce certain reaction products, and this selective effect is called enzyme specificity.

Usually enzymes can only catalyze one chemical reaction or a similar type of reaction, different enzymes have different degrees of specificity, and the specificity of enzymes can be divided into three types: absolute specificity, relative specificity, and three-dimensional specificity; It can also be divided into: structural specificity and stereoheterogeneous specificity.

Enzyme specificity: The selectivity of the enzyme for the substrate it binds to and the nature of the product that produces a definite structure is called enzyme specificity.

Specificity has these: 1Absolute specificity and relative specificity (the former requires a specific substrate, a specific reaction, a specific product; The latter only requires the same group or chemical bond, but the type of reaction is certain, and the product can be predicted) 2

Stereoisomeric specificity 3Optical isomer specificity.

Explanation: Enzyme as a kind of protein, has its complex spatial structure, enzyme has its active center structure, the specificity of the enzyme is related to its local spatial structure, you may wish to regard the enzyme as a delicate lock, the substrate is a key, that is, the famous key theory.

An enzyme can only catalyze one or a class of chemical reactions, and your three questions are one together.

Why enzymes are specific?

A substrate. b Coenzyme or coenzyme.

c Metal ions.

Denzyme proteins. e catalytic group.

Investigation Knowledge: Enzymatic Reaction Kinetics.

Correct answer d

Answer Analysis The part that determines enzyme specificity is the enzyme protein.