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BSC 215 Dynamic Study Module - Chapter 2
Terms in this set (65)
In the following chemical reaction, what is NaCl?
NaOH + HCl -> NaCl + H2O
Which of the following increases the rate of a reaction?
increased reactant concentration
Which of the following represents an exchange reaction?
AB + CD -> AD + BC
Which of the following is the same among isotopes of the same element?
Which statement best describes enzyme function?
enzymes speed chemical reactions by lowering the activation energy
Which subatomic particle carries a negative charge?
Salts are held together by _____________ ionic bonds.
The mass number of an atom is determined by the number of:
protons plus neutrons
Of the subatomic particles, which one is positively charged?
Which of the following terms is not defined as one of the three basic types of mixtures?
What contributes to the calculation of the mass number?
sum of protons and neutrons
Atoms that satisfy the octet rule are said to be ____________.
A ___________ is a mixture that generally consists of a liquid mixed with a solid.
What determines how an atom interacts with other atoms and whether it will form bonds with specific atoms?
All of the following are basic types of chemical reactions in the body except:
Atoms with the same atomic number but different mass numbers are called __________.
Which predicts the element to which an atom belongs?
total number of protons
The four most common elements, comprising 96% of the body's mass, are ___________.
oxygen, nitrogen, hydrogen, and carbon
The atomic number for each element on the periodic table represents the:
number of protons in the atom
Anything that takes up space and has mass is known as:
What type of chemical bond forms when electrons are shared unequally between two atoms?
a polar covalent bond
The synthesis reactions that take place in the body are referred to as ________ reactions, whereas the decomposition reactions are referred to as _________ reactions.
Of the 92 naturally occurring elements, the four major elements that make up 96% of all living things are:
hydrogen, oxygen, nitrogen, and carbon
A ________ forms when electrons are shared equally among the atoms in the bond.
nonpolar covalent bond
All of the following properties are associated with enzymes except:
enzymes alter the chemical reaction
The formation of a cation and an anion is indicative of __________.
an ionic bond
The atomic number represents the number of _______.
protons in an atom
What happens in oxidation-reduction (redox) reactions?
When two electron pairs are shared between atoms, a ________ is formed
What type of reaction is A + B + energy -> AB?
Energy in the human body takes on all of the following forms except:
Ionic bonds result from _________.
the transfer of electrons from a metal to a nonmetal
Determine the number of protons in an isotope of nitrogen with an atomic number of 7 and a mass number of 14.
When an atom loses an electron it is called a(n) _______; when an atom gains an electron it is called a(n) ________.
When the electrons located in the outermost electron shells of atoms interact, ______ are formed.
Nuclear medicine uses ______ in medical diagnosis and treatment.
Amino acids are the monomers for _________.
A _____ is a polar covalent bond that joins two amino acids together through a synthesis reaction.
The four nitrogenous bases found in DNA are:
adenine, guanine, cytosine, and thymine
Saturated, monounsaturated, and polyunsaturated fats differ in the:
absence or number of double covalent bonds present
Which two functional groups are always found in amino acids?
amino and carboxylic acid
When blood pH rises above 7.45, the body systems suffer from ______.
_______ is the main source of chemical energy that drives all cellular work and belongs to the class of organic molecules known as _______.
ATP; nucleic acids
Which of the following molecules is not considered a polymer?
All of the following properties are associated with water except:
it is an organic molecule
What is the function of a buffer?
buffers prevent large swings in pH when an acid or base is added to a solution
DNA contains all of the following structural features except:
it contains uracil
What chemical binds free hydrogen ions in solution?
________ is what occurs when a protein's structure and function is lost because of exposure to extreme heat or chemical factors.
Which of the following statements concerning protein structure is incorrect?
the quaternary structure is present in all proteins and consists of the combination of several polypeptide chains
A _____ reaction involves the addition of water to break down large molecules into smaller molecules.
The more hydrogen ions present in a solution, the more _____ the solution.
Organic and inorganic compounds differ in that:
inorganic compounds usually lack carbon
The primary lipid in cell membranes is:
Molecules or compounds that will not dissolve easily in water are ____.
The monomer of the carbohydrates is _______.
Which of the following organic compounds is not found in the human body?
In DNA, an adenine base will form two hydrogen bonds with ____.
a thymine base
A hydrogen acceptor in a solution is called a:
The group of polymers that contribute the smallest mass to the human body but are the most important because they are responsible for the storage and execution of the genetic code, are the:
Water has more structure than other liquids because of its ability to form hydrogen bonds. Because of this phenomena, water expresses a relatively high ____, which allows it to cushion and protect the body's structures.
Which two organ systems work to maintain pH balance in the body?
respiratory and urinary
Building blocks of organic molecules are known as ________.
On the pH scale, which number has the highest concentration of hydrogen ions?
A fatty acid that contains two or more double covalent bonds is ______.
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