Exam 2: Atoms,Ions,and Molecules

The addition of a buffer to liquid such as blood with a pH of 7.4 causes the pH to drop to 7.0 (chemically neutral).

Radioisotopes contain

Which of the following has the smallest mass

How many osmoles are in a solution of 1M NaOH

Steroid hormones are nonpolar molecules that travel in the blood.Explain how such molecules interact with the water of the plasma.

When dehydration synthesis occurs between two amino acids,a covalent bond called a _________ bond forms between them.

Water is the main solute of the body.

Water contains two hydrogen atoms bound to one oxygen atom;"H₂O" is therefore water's

Anything that has mass and occupies space is considered to be ________.

Ionic bonds involve:

Given that the mass of an oxygen atom is 16 amu and that of a hydrogen atom is 1 amu,1 mole of water would be equal to

Like most functional groups,carboxyl groups are

When a large biological molecule is digested by the addition of water,the reaction is termed _________.

FAD and NAD⁺are examples of nucleotides.

Polar R groups of closely positioned amino acids often enter into _________ with each other,which helps give a protein its three-dimensional shape.

Within the periodic table,elements are organized consecutively by

An element's atomic number is determined by the number of __________ in one atom of that element.

In a sample of distilled water,a water molecule that has picked up an extra hydrogen ion is called a(n)

Nucleic acids are made up of

The higher the concentration of H⁺is,the lower the pH is.