Chapter 2 Quiz
What is the chemical symbol for sodium
Na
What occurs when acid is added to a solution with a pH of 7
The pH drops below 7
Which of the following lipids would most likely be solid at room temperature
a saturated fat
Which is a characteristic of hydrophobic molecules
a. they have few or lack polar covalent bonds b. they form ionic bonds c. they have positive and negative partial charges d. they have many polar covalent bonds-wrong
Ions with a + charge are called
cation
nucleic acid
composed of nucleotides
two monosaccharides are joined together by which process
dehydration synthesis
A phrase that applies to covalent bonding and not other kinds of bonds is
electron-sharing
What organic molecule provides a ready source of chemical energy within all cells
glucose
Covalent bonds
involve the sharing of one to three pairs of electrons
What type of bond is formed when electrons are transferred
ionic bond
Steroids, which all share the same carbon-ring framework but differ in functional groups that are attached to the basic ring structure, are an example of
lipids
In chemical notation, they symbol Mg 2+ means
magnesium atom that has lost two electrons
Nucleic Acids
monomer- nucleotide polymer- nucleic acid
Proteins
monomer-amino acids polymer-polypeptide
Carbohydrates
monomer-monosaccharides polymer-polysaccharides
Molecules that store genetic information are
nucleic acids
An amino acid is to a protein as a _____ is to a nucleic acid
nucleotide
The letter P in the name of the energy molecule ATP stands for
phosphate
What is the main type of lipid found in cellular membranes
phospholipids
Covalent bond in which electrons are not shared equally is called
polar
Formation of hydrogen bonds requires hydrogen atoms and what else
polar covalent bonds
Which types of subatomic particles can be located within the nucleus of an atom
proteins and neutrons
which of the following substances would be the most acidic
stomach secretions- ph=1
AB--> A+B is to decomposition as A+B ---> AB is to
synthesis
Which statement is true of all atoms that are anions
the atom has more electrons that protons
When an ionic bond forms, which pats of the atoms are directly involved
the outermost electrons
carbohydrate
-cellulose, a major structural component of plant cell walls -glycogen, a major energy storage molecule in animals
Lipid
-soluble in water -steroids, such as cholesterol and sex hormones
In a covalent bond,
12Atoms share one or more pairs of electrons.
Which of these compounds is part of every cell in living organism
All of these compounds are found in every cell in a living organism
Which parts of atoms can interact to form chemical bonds
Valence electrons
Carbon atoms have 4 valence electrons. Are they likely to react with other atoms, and why or why not?
Yes, because they can become more stable by doing so
protein
catalyzes the majority of chemical reactions in the cell
Which organic molecule or molecules are found in subcutaneous tissues and around organs, and are the major source of stored energy in the body
triglycerides
