What is the name of the substance that an enzyme acts upon?

Simulate enzymatic actions. Enzymes are specialized proteins that catalyze or speed up chemical reactions within cells. The substance upon which an enzyme acts is called a substrate. Substrates are small molecules.
A.

How many functions can an enzyme have?

What determines an enzymes function?
The shape of the enzyme determines the function.
How many functions does an enzyme have.
One function.
  • Are enzymes are reusable?

    If denaturation occurs (extreme temperature change or pH changes), the enzyme will not be reusable! The structure of the enzymes are not changed. As a result of this, enzymes will be used again and again to bind onto another substrate molecule and catalyze the reaction once again.
  • How does an enzyme perform its function?

    Enzymes are biological catalysts - substances that increase the rate of chemical reactions without being used up. Enzymes are proteins folded into complex shapes that allow smaller molecules to fit into them. The place where these substrate molecules fit is called the active site.
  • What can affect the shape of an enzyme molecule?

    Denatured enzymes. Both high temperatures and extremes of pH change the bonds between amino acids in the enzyme, so changing its shape. Enzymes work slowly at low temperatures too – but this is because the substrate molecules have less energy and move into the active site more slowly.
B.

What is denaturing and what causes it to occur?

Heat can be used to disrupt hydrogen bonds and non-polar hydrophobic interactions. This occurs because heat increases the kinetic energy and causes the molecules to vibrate so rapidly and violently that the bonds are disrupted. The proteins in eggs denature and coagulate during cooking.
  • How can lock and key be used to describe an enzyme?

    The specific action of an enzyme with a single substrate can be explained using a Lock and Key analogy first postulated in 1894 by Emil Fischer. In this analogy, the lock is the enzyme and the key is the substrate. Only the correctly sized key (substrate) fits into the key hole (active site) of the lock (enzyme).
  • Can an enzyme can only bind one reactant at a time?

    An enzyme can only bind one reactant at a time. An enzyme speeds up a chemical reaction cell, but can only be used once.
  • How are the lock and key and induced fit different?

    Lock and Key states that there is no change needed and that only a certain type will fit. However induced fit says the active site will change to help to substrate fit. This is the idea that the substrate plays a role in determining the final shape of the enzyme and that the enzyme is partially flexible.
C.

How do enzymes act upon energy of activation?

The activation energy is the energy required to start a reaction. Enzymes are proteins that bind to a molecule, or substrate, to modify it and lower the energy required to make it react. The rate of reaction is given by the Arrhenius equation. The rate of reaction increases if the activation energy decreases.
  • What is the activation energy of an enzyme?

    The activation energy is the energy required to start a reaction. Enzymes are proteins that bind to a molecule, or substrate, to modify it and lower the energy required to make it react. The rate of reaction is given by the Arrhenius equation.
  • What is the effect of temperature and PH on enzyme activity?

    Effect of temperature and pH on enzyme activity. Enzymes are basically the proteins which speed up the rate of reactions in living cells. These catalysts are made by the cells in very small amounts which are not consumed during a chemical reaction. They decrease the requirement of activation energy to start a reaction.
  • How are enzymes related to activation energy?

    In summary, enzymes are proteins that lower the activation energy of a chemical reaction. Enzymes are not consumed or produced in a reaction, but they are catalysts that allow the reaction to proceed at a faster rate. Together, they form the enzyme-substrate complex.

Updated: 19th September 2018

Rate This Answer

4 / 5 based on 1 vote.