Anatomy & Physiology: Chapter 2 Chemistry of Life

Atomic number is...

• each element consists of one type of atom

• is equal to the number protons and/or electrons in an atom

• atoms that are of the same element

About ____________ of the human body weight is water.

• 30%

• 50%

• 80%

• 65%

______________ is a compound that disassociates in water to form hydrogen ions.

• Base

• Acid

• pH

• Buffer

The _____________ structure is the sequence of amino acids bonded in a polypeptide.

• primary

• secondary

• quaternary

TRUE or FALSE Lipid molecules contain at least carbon, hydrogen, and oxygen.

• TRUE

• FALSE

_____________ molecules consist of two long of strands of bonded nucleotides.

• DNA

• Element

• mRNA

Which one is fructose?

• 1

• 2

• 3

What number is neutral on the pH scale?

• 6

• 7

• 8

• 5

____________________ is a compound consisting of a cation other than hydrogen and an anion other than hydroxyl ion.

• Water

• Salt

• Buffer

• Ion

TRUE or FALSE Nucleic acids are long molecules consisting of bonded subunits called nucleotides.

• TRUE

• FALSE