Card Set Information
The "atomic weight" of an atom reflects the average number of
protons + neutrons + electrons
Radioisotopes have unstable
By weight, which element is the second most abundant in the human body?
The molecule CO2 is known as
When electrons are transferred from one atom to another, and the two atoms unite as a result of the opposite charges,
an ionic bond is formed.
The molecule O2 is known as
In an aqueous solution, sodium ions would move toward
a negative terminal.
Ionic bonds are formed when
an electron or electrons are completely transferred from one atom to another.
Sodium (Na) has an atomic number of 11. How many electrons are in the outer electron shell of a neutral sodium atom?
In hydrolysis reactions, compounds react with
water, causing decomposition.
In dehydration synthesis reactions, compounds
lose water molecules.
Compounds that can be synthesized or broken down by chemical reactions inside the body are called
An example of an inorganic substance is
water and carbon dioxide.
Which property of water helps keeps body temperature stabilized?
A solution containing equal numbers of hydrogen ions and hydroxide ions is
An important buffer in body fluids is
When placed in water, an inorganic compound dissociates 99 percent, forming hydrogen ions and anions. This compound would be
a strong acid.
A polysaccharide that is formed in liver and muscle cells to store glucose is
An example of an organic substance is:
A fatty acid that contains two or more double covalent bonds is said to be
Lipids that are produced by nearly every tissue in the body and act as local regulators are the
Substrate molecules bind to enzymes at the ________ sites.
Each amino acid differs from another in the
nature of the side chain.
The alpha-helix and pleated sheet are examples of ________ protein structure.
How would the lack of a cofactor for an enzyme affect that enzyme's function?
The enzyme would not be able to function
Molecules that store and process genetic information are the
According to the rules of complementary base pairing in nucleic acids, cytosine would pair with the base
The structure of RNA differs from DNA in that
the backbone of RNA contains ribose
The phosphorylation of adenosine forms
AMP + P ->
The average time between synthesis and breakdown is known as the ________ time.
Continuous breakdown and replacement of cellular molecules is termed