-
The "atomic weight" of an atom reflects the average number of
protons + neutrons + electrons
-
Radioisotopes have unstable
nuclei
-
By weight, which element is the second most abundant in the human body?
carbon
-
The molecule CO2 is known as
carbon dioxide
-
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
oxygen
-
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?
1
-
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
metabolites.
-
An example of an inorganic substance is
water and carbon dioxide.
-
Which property of water helps keeps body temperature stabilized?
thermal inertia
-
A solution containing equal numbers of hydrogen ions and hydroxide ions is
neutral.
-
An important buffer in body fluids is
NaHCO3.
-
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
glycogen
-
An example of an organic substance is:
sucrose
-
A fatty acid that contains two or more double covalent bonds is said to be
polyunsaturated.
-
Lipids that are produced by nearly every tissue in the body and act as local regulators are the
prostaglandins.
-
Substrate molecules bind to enzymes at the ________ sites.
active
-
Each amino acid differs from another in the
nature of the side chain.
-
The alpha-helix and pleated sheet are examples of ________ protein structure.
secondary
-
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
nucleic acids.
-
According to the rules of complementary base pairing in nucleic acids, cytosine would pair with the base
guanine.
-
The structure of RNA differs from DNA in that
the backbone of RNA contains ribose
-
The phosphorylation of adenosine forms
AMP.
-
-
The average time between synthesis and breakdown is known as the ________ time.
turnover
-
Continuous breakdown and replacement of cellular molecules is termed
metabolic turnover.
|
|
