Bio 117 Chapter 1-4 In-Class Quiz Study Guide
Questions And Answers Latest Quizzes
The strength of a covalent bond depends on the number of electrons shared. N2 shares _____ pairs. ANS
Three
Electrons are attracted to the positively charged nucleus and are held far away by '_____.' ANS Energy
Water' ___________ properties allow it to remain liquid at cold temperatures and lead to surface tension. ANS
Cohesive
Matter is composed of ____ ANS 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. ANS 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. ANS 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. ANS 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. ANS Hydrogen Bonds
The formation and breaking of chemical bonds is known as a _______. ANS 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). ANS Half-life
Molecules consisting only of carbon and hydrogen are _______, which store tremendous amounts of energy.
ANS Hydrocarbons
, Most plant starches exist as _____, which are branched alpha glucose chains. ANS 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. ANS Dehydration
______ consists of beta glucose and has beta 1-4 linkages. ANS 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. ANS Glycerine
High concentrations of salt and vinegar _______ proteins in bacteria and thus act as good food preservatives.
ANS Denatures
Proteins consist of polymers of _________. The specific chain of amino acids determines the structure and
thus the function of the protein. ANS Amino Acids
RNA contains a ______ sugar instead of deoxyribose and uses uracil instead of thymine. ANS Ribose
______ pairs with Thymine and Uracil and Cytosine pairs with Guanine, the most stable hydrogen bond
associations. ANS Adenine
Excess carbohydrates consumed in the diet are immediately converted to _____ for storage. ANS Fat
Niels Bohr showed that atoms consist of a dense mass of protons and neutrons surrounded by a whirring cloud
of __________ ANS Electrons
Atoms have equal numbers of __________ and electrons and the chemical properties are determined by the
number and configuration of electrons ANS Protons
One proton weighs one dalton and it takes 6.02 x10 23 daltons to get one gram. The weight of electrons is
_________. ANS Negligable
Questions And Answers Latest Quizzes
The strength of a covalent bond depends on the number of electrons shared. N2 shares _____ pairs. ANS
Three
Electrons are attracted to the positively charged nucleus and are held far away by '_____.' ANS Energy
Water' ___________ properties allow it to remain liquid at cold temperatures and lead to surface tension. ANS
Cohesive
Matter is composed of ____ ANS 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. ANS 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. ANS 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. ANS 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. ANS Hydrogen Bonds
The formation and breaking of chemical bonds is known as a _______. ANS 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). ANS Half-life
Molecules consisting only of carbon and hydrogen are _______, which store tremendous amounts of energy.
ANS Hydrocarbons
, Most plant starches exist as _____, which are branched alpha glucose chains. ANS 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. ANS Dehydration
______ consists of beta glucose and has beta 1-4 linkages. ANS 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. ANS Glycerine
High concentrations of salt and vinegar _______ proteins in bacteria and thus act as good food preservatives.
ANS Denatures
Proteins consist of polymers of _________. The specific chain of amino acids determines the structure and
thus the function of the protein. ANS Amino Acids
RNA contains a ______ sugar instead of deoxyribose and uses uracil instead of thymine. ANS Ribose
______ pairs with Thymine and Uracil and Cytosine pairs with Guanine, the most stable hydrogen bond
associations. ANS Adenine
Excess carbohydrates consumed in the diet are immediately converted to _____ for storage. ANS Fat
Niels Bohr showed that atoms consist of a dense mass of protons and neutrons surrounded by a whirring cloud
of __________ ANS Electrons
Atoms have equal numbers of __________ and electrons and the chemical properties are determined by the
number and configuration of electrons ANS Protons
One proton weighs one dalton and it takes 6.02 x10 23 daltons to get one gram. The weight of electrons is
_________. ANS Negligable
