Biology Mid-term

Question Answer
In a chemical reaction, atoms in the ____________ are rearranging to create new ___________________.
What is the main function of an enzyme? to speed up the rate of a chemical reaction
what kind of bond is inside one water molecule? covalent
which of the following water properties is responsible for water traveling up the paper towel in our "wick trick" demonstration? capillary action
when two water molecules are attracted to one another, this is known as cohesion
a substance with a pH of 6 is called an acid
When acid is added to water, what type of solution does it produce?
pure water has a pH of 7
pH ranges from 0-14
what are the characteristics of bases? taste bitter, sweetish or salty; react more easily with protein than with metal; can burn skin and eyes
another name for a compound primarily made up of carbon is organic compound
which statement correctly describes how a carbon's ability to form four bonds makes it uniquely suited to make macromolecules?
the macromolecule that is known for storing energy the best, like fats and oils, is known as a lipid
RNA and DNA are examples of nucleic acids
Glucose, a basic form of sugar, is an example of which of the following macromolecules?
A ____________________ can also be described as a building block to make up a ___________________. monomer; polymer
genetic material is stored in this type of macromolecule? nucleic acid
carbohydrates and proteins are two types of macromolecules. which functional characteristic of proteins distinguishes them from carbohydrates? ability to speed up reactions and carry out processes
what is the difference between a covalent and ionic bond?
everything is made up of ________________. mater
the three particles that make up atoms are protons, neutrons, and electrons
the atomic number of an atom tells you the number of _____________. protons
how can you tel the difference between two different elements in the periodic table? by looking at the number of protons
the _________________ in an atom are found in the _____________________. neutrons; nucleus
valence electrons are knows as the electrons in an atom in the _______________. outermost ring
a covalent bond is formed when one atom __________________ with another atom. shares electrons
an ionic bond is formed when one atom ______________- with another atom transfers electrons
between two water molecules ____________ bonds can be found, but inside one water molecules ______________ bonds can be found. hydrogen; covalent
why is a water molecule polar? oxygen pulls electrons more than the two hydrogen atoms
when an electron is lost, a ______________ charge is left on an atom. positive
because electrons in a water molecule spend most of their time around the __________ atom(s). that side of the molecule is more _____________. oxygen; positive
states that matter cannot be created or destroyed but instead can be transformed and combined conservation of matter
positively changed subatomic particle located in the nucleus of an atom polar
total number of protons in the nucleus of an atom atomic number
negatively charged subatomic particle that is negatively charged and located in the outer rings electron
bond formed when two atoms share electrons covalent bond
bond formed when one or more electrons are completely transferred from one atom to another ionic bond
when two different molecules are attracted to one another, like water to glass adhesion
when a molecule has partial positive and negative charges because of the atoms' electrons polar
when two of the same molecule are attracted to one another, like water to water cohesion
when two water molecules form a bond between the oxygen of one and the hydrogen of another hydrogen bond
basic unit of matter atom

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