Ch 2 Molecules of life

Question 1

Atoms

Answer 1

basic units of all matter, made up of protons neutrons and electrons

Question 2

Amino acid

Answer 2

A sub unit of protein

Question 3

Carbohydrate

Answer 3

A compound containing principally carbon, hydrogen and oxygen in a 1:2:1 ratio

Question 4

Covalent bond

Answer 4

A strong chemical bond formed when two atoms share electrons

Question 5

Hydrogen bond

Answer 5

A weak bond, attraction between a hydrogen atom in a polar molecule and an electronegitive atom in the same or another molecule

Question 6

Ion

Answer 6

an atom or molecule that has gained or lost electrons–cations and anions

Question 7

Ionic bond

Answer 7

A chemical bond resulting from the attraction between positively and negatively charged ions; ions form when electrons from one atom become part of another atom

Question 8

Lipid

Answer 8

An organic molecule that is insoluble in water

Question 9

Macromolecule

Answer 9

A very large molecule that is usually consisting of repeating units

Question 10

Nucleic Acid

Answer 10

a macro molecule consisting of chains of nuceotide sub units to form either DNA or RNA

Question 11

Organic compounds

Answer 11

A compound that carbon atom covalently bonded to a hydrogen atom