Science 1002: LIFEPAC TEST
2,8,1
The numbers listed represent the first, second, and third electron energy levels, respectively. On the basis of this information, which of the following atoms is reactive?
8
The pH value closest to neutrality is _____.
the release of energy
A chemical reaction in your body in which bonds are broken is associated with ______.
losing an outer energy level electron
A potassium atom may become a potassium ion (K+) by ______.
Acid
A substance that dissociates into H+ ions and tends to lower the pH of a solution is called a(n) _____.
Protein
Amino acids are the building blocks of _____.
12
An atom that has 12 protons in its nucleus has an atomic number of _____.
nucleic acid
DNA
fatty acids and glycerol
Digestion of fat molecules produces ______.
True
Enzymes always contain protein.
Ions
F+,Na+,Cl-; and HCO-3 all have charges and therefore are called _____.
Buffer
In an antacid medication, bicarbonate acts as a _____ to neutralize stomach acid.
shared
In covalent bonding, outer energy level electrons are ___ between atoms.
outer energy level electrons are gained and lost
In the process of ionic bonding ______.
Proteins
Manufacture of antibodies, certain hormones, and hemoglobin requires _____ in the diet.
True
Organic compounds almost always bond covalently.
True
Organic compounds are found in living organisms.
True
Organic compounds form polymers.
False
Organic compounds usually contain few atoms.
Bases
Substances such as NaOH which dissociate into OH- ions are classified as _____.
Hydrolysis
The breakdown of a polysaccharide into monosaccharides is an example of _____.
AB ------> A + B
The decomposition reaction is _____.
pH
The degree of acidity or alkalinity of a given solution is referred to as its _____.
heat
Water helps to maintain body temperature because it absorbs and releases _____ very slowly.
An immediate source of energy
Water is NOT _____.
Lipid
cholesterol
Protein
enzyme
Lipids
fats
Protein
hemoglobin
Carbohydrates
starch
lipids
steroids
carbohydrate
sugar
