Chapter 2: The Chemistry of Life

An enzyme speeds up a reaction by

• giving off energy
• taking in energy
• lowering the activation energy
• raising the activation energy

In a chemical reaction, a reactant binds to an enzyme at a place known as the

• active site
• catalyst
• product
• substrate

Carbohydrates are made up of all of the following EXCEPT

• carbon
• hydrogen
• oxygen
• sodium

Tags

NGSS.HS-LS1-6

Proteins are polymers formed from

• amino acids
• lipids
• nucleic acid
• simple sugars

Tags

NGSS.HS-LS1-6

A compound that releases hydrogen ions (H+) in a solution is a(n)

• acid
• base
• polymer
• salt

When you mix salt and water together in a beaker, you cause them to form a

• compound
• solution
• mixture
• suspension

A covalent bond is formed by the

• gaining of electrons
• losing of electrons
• sharing of electrons
• transfer of electrons

Two or more atoms are joined in definite amounts in any

• compound
• element
• isotope
• symbol

Tags

NGSS.MS-PS1-1

The positively charged particle in an atom is a(n)

• electron
• ion
• neutron
• proton