BASIC BIOCHEMISTRY WITH
CORRECT QUESTIONS AND
ANSWERS
Atom - CORRECT ANSWER-basic unit of matter
Nucleus - CORRECT ANSWER-center of atom
electron - CORRECT ANSWER-negatively charged particle in
electron cloud(atomic number = number of protons)
proton - CORRECT ANSWER-positively charged particle at
center of atom(atomic number & number of electrons)
element - CORRECT ANSWER-pure substance that consists
entirely of one type of atom.
isotopes - CORRECT ANSWER-atoms that differ in the number
of neutrons they contain
radioactive isotopes - CORRECT ANSWER-nuclei are unstable
and break down at a constant rate over time
compound - CORRECT ANSWER-substance formed by 2 or
more elements in definite proportions
ionic bind - CORRECT ANSWER-one or more electrons are
transferred from one atom to another
ions - CORRECT ANSWER-electrically charged atoms that
have gained or lost electrons.
, covalent bond - CORRECT ANSWER-a chemical bond that
involves sharing a pair of electrons between atoms in a
molecule
molecule - CORRECT ANSWER-two or more atoms held
together by covalent bonds
van der Waals forces - CORRECT ANSWER-intermolecule
force of attraction
polar substance - CORRECT ANSWER-molecule in which the
charges are unevenly distributed (cell membrane is non polar
and surrounds cells in our body; some animals use oils to
waterproof themselves)
hydrogen bond - CORRECT ANSWER-attraction between a
hydrogen atom with a partial positive charge and another atom
with a partial negative charge
Properties of Water - CORRECT ANSWER-great solvent
high heat capacity
polar substance
less dense as solid
surface tension
strong adhesion
cohesion
cohesion - CORRECT ANSWER-attraction between molecules
of the same substance(allows water and other liquids to be
transported throughout organisms)
adhesion - CORRECT ANSWER-attraction between molecules
of different substances(from hydrogen bonds)
surface Tension - CORRECT ANSWER-resistance on top from
hydrogen bonds (organisms use tension to move across water)
CORRECT QUESTIONS AND
ANSWERS
Atom - CORRECT ANSWER-basic unit of matter
Nucleus - CORRECT ANSWER-center of atom
electron - CORRECT ANSWER-negatively charged particle in
electron cloud(atomic number = number of protons)
proton - CORRECT ANSWER-positively charged particle at
center of atom(atomic number & number of electrons)
element - CORRECT ANSWER-pure substance that consists
entirely of one type of atom.
isotopes - CORRECT ANSWER-atoms that differ in the number
of neutrons they contain
radioactive isotopes - CORRECT ANSWER-nuclei are unstable
and break down at a constant rate over time
compound - CORRECT ANSWER-substance formed by 2 or
more elements in definite proportions
ionic bind - CORRECT ANSWER-one or more electrons are
transferred from one atom to another
ions - CORRECT ANSWER-electrically charged atoms that
have gained or lost electrons.
, covalent bond - CORRECT ANSWER-a chemical bond that
involves sharing a pair of electrons between atoms in a
molecule
molecule - CORRECT ANSWER-two or more atoms held
together by covalent bonds
van der Waals forces - CORRECT ANSWER-intermolecule
force of attraction
polar substance - CORRECT ANSWER-molecule in which the
charges are unevenly distributed (cell membrane is non polar
and surrounds cells in our body; some animals use oils to
waterproof themselves)
hydrogen bond - CORRECT ANSWER-attraction between a
hydrogen atom with a partial positive charge and another atom
with a partial negative charge
Properties of Water - CORRECT ANSWER-great solvent
high heat capacity
polar substance
less dense as solid
surface tension
strong adhesion
cohesion
cohesion - CORRECT ANSWER-attraction between molecules
of the same substance(allows water and other liquids to be
transported throughout organisms)
adhesion - CORRECT ANSWER-attraction between molecules
of different substances(from hydrogen bonds)
surface Tension - CORRECT ANSWER-resistance on top from
hydrogen bonds (organisms use tension to move across water)
