Exam 2: Chemical Basis of Life

Name the type of chemical bonding that occurs between the two nucleotide chains of a DNA molecule.

The building blocks of __________ molecules are fatty acids and glycerol.

The building blocks of triglyceride molecules are amino acids.

A pH value indicatesthe hydrogen ion concentration in solutions such as body fluids.

Stearic acid and linolenic acid are both fatty acids built on chains of 18 carbon atoms. Based on their chemical composition, which of these is the saturated fatty acid?Stearic acid: 18 carbon atoms, 36 hydrogen atoms, 2 oxygen atomsLinolenic acid: 18 carbon atoms, 30 hydrogen atoms, 2 oxygen atoms

The branch of science called __________ deals with the composition of matter.

Indicate the non-carbohydrate molecule.

A(n) __________ solution contains more hydroxide ions than hydrogen ions.

Based on their subatomic makeup, which atom is actually an ion?Atom 1: 3 protons, 2 neutrons, 3 electronsAtom 2: 3 protons, 3 neutrons, 2 electronsAtom 3: 3 protons, 1 neutron, 3 electrons

By what mechanism does a chemical bond form between an ion of potassium (K+) and chloride (Cl-)?

What type of chemical bond is formed by the attraction of the positive hydrogen end of one polar molecule to the negative nitrogen or oxygen end of another polar molecule?

In an atom, the first (innermost) shell contains a maximum of __________ electrons.

Within a phospholipid molecule, the phosphate "head" is __________ and the fatty acid "tails" are __________.

Water is an example of a compound.

The atomic __________ for an element is equal to the number of protons in the nucleus of one atom of that particular element.

A solution with a pH of 6 has ten times the hydrogen ion concentration of a solution of what pH?

What type of fatty acid will have double bonds between carbon atoms within its carbon chain?

What type of lipid is used in the production of hormones such as estrogen and testosterone?

All isotopes of an element have the same number of electrons.

Three atoms have the following subatomic particles:Atom 1: 3 protons, 2 neutrons, 3 electronsAtom 2: 3 protons, 3 neutrons, 2 electronsAtom 3: 3 protons, 1 neutron, 3 electronsWhich statement best describes these three atoms?