Exam 2: Molecular Interactions

Define polar covalent, nonpolar covalent, ionic, and hydrogen bonding.Which of these bonds involves more than one molecule? Which of these bonds is/are important in determining the properties of water? Explain.

The sequence and number of amino acids in the chain is an example of which of the following levels of protein structure?

According to the rules of complementary base pairing, a nucleotide containing the base cytosine would only pair with a nucleotide containing the base

The smallest unit of an element is a(n)

Compare and contrast the role of up-regulation and down-regulation of proteins.

In a chemical reaction, ________ between atoms are broken as atoms are rearranged in new combinations to form different chemical substances.

Which of the following combination of elements make up 90% of the body's mass?

All of these statements about carbohydrates are True EXCEPT one.Identify the exception.

Which of the following is NOT considered an essential element for a living organism?

Hemoglobin molecules are made from four globular protein subunits.The three-dimensional shape of these globular subunits would be an example of which of the following levels of protein structure?

How many grams of NaCl, molecular mass = 58.5 Daltons, are necessary to make 1 liter of 5% saline?

A change in pH value of one unit indicates a

The identity of an element can be determined by the number of

Molecules that readily dissolve in water are called

Polymers are a typical formation of ________ molecules.

Atoms in a covalent molecule

Noncovalent molecular interactions occur between many different biomolecules and often involve proteins.Give an example of such an interaction and what the function might be.

Beta strands are an example of a spatial arrangement of amino acids.

The molecule DNA contains the five-carbon sugar

In regard to lipids, the term unsaturated refers to