Bio 117 Chapter 1-4 In-Class Quiz Study
Guide UPDATED ACTUAL Exam
Questions and CORRECT Answers
The strength of a covalent bond depends on the number of electrons shared. N2 shares _____
pairs. - CORRECT ANSWER - Three
Electrons are attracted to the positively charged nucleus and are held far away by '_____.' -
CORRECT ANSWER - Energy
Water' ___________ properties allow it to remain liquid at cold temperatures and lead to surface
tension. - CORRECT ANSWER - Cohesive
Matter is composed of ____ - CORRECT ANSWER - Atoms
The electrons in the outer most energy level are referred to as ________ electrons and they
determine the chemical properties of an element. Elements 'want' to have a full outer shell of 8. -
CORRECT ANSWER - Valence
The precise location of an electron can not be known but the area where they are most likely to
occur is the orbital. Orbitals can contain only _____ electrons and can be close or far away from
the nucleus. - CORRECT ANSWER - Two
Only ______ elements are found in living things in more than trace amounts and 4 elements,
CHON, make up 96% of the mass of living things. - CORRECT ANSWER - Twelve
Associations between the negatively charged O of one molecule and the positively charged H of
another form _________ and account for much of the organization of living systems. -
CORRECT ANSWER - Hydrogen Bonds
, The formation and breaking of chemical bonds is known as a _______. - CORRECT
ANSWER - Reaction
Some isotopes are more radioactive than others, but all decay at a constant rate and have constant
______ (the time it takes ½ of the mass of an isotope to disappear). - CORRECT
ANSWER - Half-life
Molecules consisting only of carbon and hydrogen are _______, which store tremendous
amounts of energy. - CORRECT ANSWER - Hydrocarbons
Most plant starches exist as _____, which are branched alpha glucose chains. - CORRECT
ANSWER - Pectins
_______ reactions are performed by enzymes within cells and consist of the removal of an OH
group from one monomer and an H atom from another to form a water molecule. - CORRECT
ANSWER - Dehydration
______ consists of beta glucose and has beta 1-4 linkages. - CORRECT ANSWER -
Cellulose
In ______, the R group is an H. In all other amino acids the group leads to chirality. In all living
systems, the L form of the amino acid is used. - CORRECT ANSWER - Glycerine
High concentrations of salt and vinegar _______ proteins in bacteria and thus act as good food
preservatives. - CORRECT ANSWER - Denatures
Proteins consist of polymers of _________. The specific chain of amino acids determines the
structure and thus the function of the protein. - CORRECT ANSWER - Amino Acids
RNA contains a ______ sugar instead of deoxyribose and uses uracil instead of thymine. -
CORRECT ANSWER - Ribose
Guide UPDATED ACTUAL Exam
Questions and CORRECT Answers
The strength of a covalent bond depends on the number of electrons shared. N2 shares _____
pairs. - CORRECT ANSWER - Three
Electrons are attracted to the positively charged nucleus and are held far away by '_____.' -
CORRECT ANSWER - Energy
Water' ___________ properties allow it to remain liquid at cold temperatures and lead to surface
tension. - CORRECT ANSWER - Cohesive
Matter is composed of ____ - CORRECT ANSWER - Atoms
The electrons in the outer most energy level are referred to as ________ electrons and they
determine the chemical properties of an element. Elements 'want' to have a full outer shell of 8. -
CORRECT ANSWER - Valence
The precise location of an electron can not be known but the area where they are most likely to
occur is the orbital. Orbitals can contain only _____ electrons and can be close or far away from
the nucleus. - CORRECT ANSWER - Two
Only ______ elements are found in living things in more than trace amounts and 4 elements,
CHON, make up 96% of the mass of living things. - CORRECT ANSWER - Twelve
Associations between the negatively charged O of one molecule and the positively charged H of
another form _________ and account for much of the organization of living systems. -
CORRECT ANSWER - Hydrogen Bonds
, The formation and breaking of chemical bonds is known as a _______. - CORRECT
ANSWER - Reaction
Some isotopes are more radioactive than others, but all decay at a constant rate and have constant
______ (the time it takes ½ of the mass of an isotope to disappear). - CORRECT
ANSWER - Half-life
Molecules consisting only of carbon and hydrogen are _______, which store tremendous
amounts of energy. - CORRECT ANSWER - Hydrocarbons
Most plant starches exist as _____, which are branched alpha glucose chains. - CORRECT
ANSWER - Pectins
_______ reactions are performed by enzymes within cells and consist of the removal of an OH
group from one monomer and an H atom from another to form a water molecule. - CORRECT
ANSWER - Dehydration
______ consists of beta glucose and has beta 1-4 linkages. - CORRECT ANSWER -
Cellulose
In ______, the R group is an H. In all other amino acids the group leads to chirality. In all living
systems, the L form of the amino acid is used. - CORRECT ANSWER - Glycerine
High concentrations of salt and vinegar _______ proteins in bacteria and thus act as good food
preservatives. - CORRECT ANSWER - Denatures
Proteins consist of polymers of _________. The specific chain of amino acids determines the
structure and thus the function of the protein. - CORRECT ANSWER - Amino Acids
RNA contains a ______ sugar instead of deoxyribose and uses uracil instead of thymine. -
CORRECT ANSWER - Ribose
