BIOLOGY 160 EXAM 1 QUESTIONS AND CORRECT
ANSWERS (VERIFIED ANSWERS) A GRADE
. Ions of opposite charge can interact by electrostatic forces,
making... - correct answer- ionic bonds.
A key characteristic of atoms is that they are most stable when...
- correct answer- they have full outer electron shells
A single pair of shared electrons makes a single covalent bond.
Atoms can share... - correct answer- two pairs of electrons
(in a double bond), or even three pairs of electrons (in a triple
bond).
Adhesion - correct answer- The attraction of water
molecules to molecules other than water. Capillary action (in
which water will spontaneously climb up the walls of a tube
without pumping) is a result of the adhesion of water molecules
with the surface of a tube containing the water.
All atoms have a nucleus, made up of... - correct answer-
protons (+) and neutrons(+-), and are surrounded by
electrons(-).
,All matter can be classified in one of two categories: - correct
answer- biotic (living) or abiotic (nonliving)
All organisms grow and develop. Growth is just an increase in
size. In development... - correct answer- structure and
function change in an orderly way as an organism passes
through its life cycle
An individual's pattern of development is partly determined by
genetic instructions. DNA.... - correct answer- the molecule
of inheritance, encodes proteins and other molecules that build
cells and make them work.
Any matter an organism needs but cannot make for itself is
considered a _____ for that organism - correct answer-
Nutrient
Atom - correct answer- The basic unit of matter that cannot
be further broken down without losing its unique properties.
One atom consists of a dense nucleus surrounded by a cloud of
electrons.
Atoms come in different types, called... - correct answer-
elements. Also, atoms are the smallest unit of elements.
, Bonds in which electrons are unequally shared between the
atoms are called... - correct answer- polar covalent bonds.
Both nutrients and wastes are made of atoms; they occupy
space and have.... - correct answer- mass
Buffers - correct answer- Solutions which resist changes in
pH by acting as either an acid or a base. Blood is an example of a
buffered solution. This means that if a small amount of acid or
base is introduced to the bloodstream, components in your
blood will neutralize the acid or base and the pH of your blood
will change only very slightly.
By summing the atomic mass of all the atoms in a molecule, one
can estimate the... - correct answer- molecular mass of the
molecule.
Calories is a measure of... - correct answer- energy
Carry a negative charge, because they have more electrons than
protons... - correct answer- Anions...They readily take on
one or more extra electrons. charge of -1.
ANSWERS (VERIFIED ANSWERS) A GRADE
. Ions of opposite charge can interact by electrostatic forces,
making... - correct answer- ionic bonds.
A key characteristic of atoms is that they are most stable when...
- correct answer- they have full outer electron shells
A single pair of shared electrons makes a single covalent bond.
Atoms can share... - correct answer- two pairs of electrons
(in a double bond), or even three pairs of electrons (in a triple
bond).
Adhesion - correct answer- The attraction of water
molecules to molecules other than water. Capillary action (in
which water will spontaneously climb up the walls of a tube
without pumping) is a result of the adhesion of water molecules
with the surface of a tube containing the water.
All atoms have a nucleus, made up of... - correct answer-
protons (+) and neutrons(+-), and are surrounded by
electrons(-).
,All matter can be classified in one of two categories: - correct
answer- biotic (living) or abiotic (nonliving)
All organisms grow and develop. Growth is just an increase in
size. In development... - correct answer- structure and
function change in an orderly way as an organism passes
through its life cycle
An individual's pattern of development is partly determined by
genetic instructions. DNA.... - correct answer- the molecule
of inheritance, encodes proteins and other molecules that build
cells and make them work.
Any matter an organism needs but cannot make for itself is
considered a _____ for that organism - correct answer-
Nutrient
Atom - correct answer- The basic unit of matter that cannot
be further broken down without losing its unique properties.
One atom consists of a dense nucleus surrounded by a cloud of
electrons.
Atoms come in different types, called... - correct answer-
elements. Also, atoms are the smallest unit of elements.
, Bonds in which electrons are unequally shared between the
atoms are called... - correct answer- polar covalent bonds.
Both nutrients and wastes are made of atoms; they occupy
space and have.... - correct answer- mass
Buffers - correct answer- Solutions which resist changes in
pH by acting as either an acid or a base. Blood is an example of a
buffered solution. This means that if a small amount of acid or
base is introduced to the bloodstream, components in your
blood will neutralize the acid or base and the pH of your blood
will change only very slightly.
By summing the atomic mass of all the atoms in a molecule, one
can estimate the... - correct answer- molecular mass of the
molecule.
Calories is a measure of... - correct answer- energy
Carry a negative charge, because they have more electrons than
protons... - correct answer- Anions...They readily take on
one or more extra electrons. charge of -1.
