Biology9

What is a chemical reaction?

1. Changing chemicals into new chemicals.

What are the reactants?

CO₂+H₂O

What are the products?

 H₂CO₃

What is the activation energy?

1.  Energy used to get reaction started

Most enzymes are what type of macromolecule?

Proteins

Most enzymes are…… or………... structures

Teritary or quaternary

Enzymes act as what in reaction?

catalyst

Are enzymes permanently changed in the chemical reaction they are involved in?

 not permanently changed.

Will and enzyme work on any substance?

1. No, certain substances only : Lock & Key

Can,enzymes be reused?

Yes

What ending is found on many enzymes?

-ase

1. Give three examples of enzymes with this ending( -ase)

-Sucrase

-lactase

-maltase

How does an enzyme work?

1. Weaken bonds lowers activation energy

What effect does an enzyme have on activation energy needed to start a reaction?

1. It lowers it 

Hydrogen peroxide H₂O₂ is a common waste product of cells. Enzymes called catalases in cells break down into harmless……

H₂O₂

What is meant by the term substrate?

Reactants

What is meant by an active site?

1. Where substrate bonds to an Enzyme, Restricted reigion

1. What is meant by induced fit(3)

 -change in shape

           -induced by structure

           -Change locks

1. List 4 factors that can affect enzyme activity

-change in temperature

-pH

-cofactors & coenzymes

-Inhabeters

What is the effect of high temperature on an enzyme?

1. Denature enzymes

What temperature do most enzymes do best at?

1. Normal body temperature

What temperature do most enzymes do best at?

1. Normal body temperature

Most enzymes like a pH near?

1.  6-8

To denature an enzyme mans the enzyme becomes what and can no longer work properly?

unfolded

1. What are 4 key roles for enzymes 

-Regulate chemical pathways

-Make materials the calls need

-Realease energy

-Transfering information