Chapter 2 Quiz
This lipid is used by the body as a precursor for the production of steroid hormones.
cholesterol
The bond between sodium and chloride in NaCl involves
the transfer of electrons from one atom to another
Which is not true about carbohydrates?
they have mostly ionic bonds
This type of lipid is used by the body for insulation.
triglycerides
An atom with 2 or more shells can be described as chemically stable if its valence shell contains _ _.
eight electrons
Which of the following is a monosaccharide that is used by cells to produce energy?
glucose
What type of chemical bond commonly forms between adjacent water molecules?
hydrogen bonds
Which of the following describes the major significance of the element chlorine in the human body?
ionized form is most plentiful anion in extracellular fluid
The nucleus of unstable _____ of an element will decay leading to emission of radiation.
isotopes
Which of the following carbohydrates is a disaccharide?
lactose
Among isotopes of any particular element, the number of _____ can vary, and therefore the mass number of the element will vary.
neutrons
What region of an atom contains the protons and neutrons?
nucleus
In a polar covalent bond, the atom that has the most electronegativity will have a
partial negative charge.
This type of fatty acid contains more than one double bond in its hydrocarbon chain.
polyunsaturated
Within your body, anabolic reactions occur all the time. Cells of the body use the raw materials derived from the foods you eat (which are first digested into smaller molecules by your digestive system), and build new larger molecules from the smaller molecules that are taken into the cell. What is another name for this type of chemical reaction?
Synthesis
What is the most abundant and most important inorganic compound in the body?
Water
In DNA, a guanine base will form a hydrogen bond with
a cytosine base
Which of the following is a proton donor?
acid
A solution with a pH value less than 7 is
acidic
Which of the following can lower the amount of free radicals in the body?
antioxidants
Ninety-six percent of the body mass is made from
carbon, oxygen, hydrogen and nitrogen