Science 1002: LIFEPAC TEST

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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


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