2

A nucleotide consists of

5 carbon sugar 1 nitrogenous base 1 phosphate group

Carbohydrate molecules A.) are the body's most readily available source of energy B.) are composed of C, H,O and N atoms C.) contain the genetic information found in cells D.) form the regulatory molecules known as enzymes E.) are the building blocks of cellular membranes

A.) are the body's most readily available source of energy.

which of the following are dissachrides? A.) lactose and sucrose B.) glucose and fructose C.) glycogen and starch D.) sucrose and galactose

A.) lactose and sucrose

Because water has a high heat of vaporization it A.) participates in chemical reactions B.) provides an excellent cooling mechanism C.) dissolves many substances D.) serves as an excellent lubricant

A.) provides an excellent cooling mechanism

Amino acid are different from each other because of the A.) structure of a side chain (R group) B.) way that they form their peptide bond C.) amino end of the molecule D.) carboxyl end of the molecule

A.) structure of a side chain (R group)

the primary high energy molecule formed and used in the call is

ATP

A molecule composed of glycerol, two fatty acids and a phosphate group is a A.) cholesterol B.) saturated fat C.) phospholipid D.) glycogen

C.) Phospholipid

which of the following statements about water is not correct? A.) contains hydrogen bonds B.) is composed of plolar molecules C.) has a relatively low heat capacity D.) can dissolve many substances E.) is responsible for much of the mass of the human body

C.) has a relatively low heat capacity

Which of the following substances would be most acidic? A.) white wind pH = 3 B.) tomato juice pH = 4 C.) stomach secretions pH = 1 D.) urine pH = 6 E.) lemon juice pH = 2

C.) stomach secretions pH = 1

All of the following are true concerning enzymes, except that they: A.) affect the rate of a chemical reation B.) function as biological catalysts C.) have an active site are proteins D.) are consumed during the reaction.

D.) are consumed during the reaction.

Carbohydrates, lipids, and proteins are classified as

Organic molecules

if a substance has a pH that is greater than 7 it is

alkaline

A(n) __ removes hydrogen ions and a(n) ___ releases hydrogen ions.

base ; acid

A solution that contains equal numbers of hydrogen and hydroxide ions is A.) neutral B.) basic C.) alkaline D.) acidic

neural

Molecules that store and process genetic information are the

nucleic acids

Lipids that are produced by nearly ever tissue is the body and that act as local regulators of metabolism are the

prostaglandins

each of the following is an example of an inorganic compound except bases water salts acids rocks

rocks

the tertiary structure of a protein refers to the

three dimensional structure of the molecule

Lipids which are used to store energy and /or cushion structures (i.e. eye, kidney) are called:

triglycerides

Hydrophilic molecules readily associate with

water molecules