Chemistry Quiz

Chemists call the energy that is needed to get a reaction started the _____________________.

• minimal energy

• Activation energy

• high energy

A _________ is a compound that produces hydroxide ions(OH ions) in solution.

• buffer

• solvent

• base

____________ are macromolecules that contain nitrogen as well as carbon, hydrogen, and oxygen.

• Proteins

• Amino Acids

• Lipids

The reactants of enzyme-catalyzed reactions are known as _____________.

• substrate

• products

• substances

A(n) _______ is any compound that forms H+ ions in solution.

• Acids

• Base

• Solvents

Chemists devised a measurement system called the _____ scale to indicate the concentration of H+ ions in solution.

• pH

• nH

• mH

______________ are proteins that act as biological catalysts.

• enzymes

• lipids

• hormones

Macromolecules are formed by a process known as __________________.

• polymerization

• cohesion

• macromerization

______________ is an attraction between molecules of different substances.

• adhesion

• cohesion

• magentism

Atoms of the same element that differ in the number of neutrons they contain are known as ___________.

• isotopes

• compounds

• substances