Biological Chemistry Questions

Lipids that are produced by nearly every tissue in the body and that act as local regulators of cell activities are thea) prostaglandins.b) steroids.c) monoglycerides.d) phospholipids.e) glycolipids.

A functional group is best described as groups ofa) elements that occur in a salt.b) atoms that greatly influence the chemical properties of molecules they are part of.c) the only atoms that ever function in the body.d) elements that form at high pH.

The molecule CO2 is known asa) carbonized oxygen.b) carbonated oxygen.c) carbon monoxide.d) carbon dioxide.

Which of the following substances would be most acidic?a) lemon juice, pH = 2b) urine, pH = 6c) tomato juice, pH = 4d) white wine, pH = 3e) stomach secretions, pH = 1

Adding one phosphate group to adenosine formsa) ADP.b) ATP.c) AMP.d) 2ATP.e) ribose.

Nonpolar organic molecules are good examples ofa) electrolytes.b) molecules that will dissociate fully when placed in water.c) hydrophobic compounds.d) hydrophilic compounds.

Substrate molecules bind to enzymes at the ________ sites.a) aminob) activec) carboxyld) neutral

An ion differs from its parent atom by the number of:neutrons.protons.electrons.atomic mass.

Carbohydrates, lipids, and proteins area) organic molecules.b) inorganic molecules.c) acids.d) salts.e) bases.

Adenosine is formed by combininga) adenine and ribose.b) adenine and phosphate group.c) ribose and a phosphate group.d) adenine, ribose, and a phosphate group.e) adenine, ribose, and 3 phosphate groups.

Buffer pairs function to:a maintain the blood pH at 6.5.b keep the pH of all systems in the body at 7.00.c converting weak acids to stronger acids.d prevent large changes in pH.

area of an enzyme where the substrate attaches active sitephosphorylasehydrolysisisomerase

In an aqueous solution, sodium ions would move towarda) a negative terminal.b) a positive terminal.c) a pH terminal.d) an organic terminal.e) the bottom.

A potato is eaten and then broken down into glucose. This process is called:anabolism.digestion.absorption.oxidation.

Each of the following is an example of an inorganic compound, excepta) water.b) acids.c) bases.d) salts.e) proteins

Which of the following is the symbol for an amino group?a) -COOHb) -PO3c) -NH2d) -AMOe) -OH

Which pH is closest to normal blood pH?a) pH 7.4b) pH 8c) pH 6d) pH 1.5

AB → A + B is to decomposition as A + B → AB is toa) exchange.b) synthesis.c) combustion.d) replacement.

Each amino acid differs from another in thea) number of peptide bonds in the molecule.b) size of the amino group.c) number of carboxyl groups.d) nature of the side chain.

The alpha-helix and pleated sheet are examples of ________ protein structure.a) primaryb) secondaryc) tertiaryd) quaternary