MCDB 1150 Exam 1 Questions and
Answers
4 Macromolecules - Correct Answers -Protein (polypeptides), Lipids (fatty,
phospholipids), carbohydrates (sugars), nucleic acids (DNA, RNA)
Complimentary surfaces - Correct Answers -Lock and key (enzymes and substrates)
(receptors and ligands) (antibodies and antigens)
Structure determines... - Correct Answers -function
atom - Correct Answers -smallest unit of element- electrically neutral
molecule - Correct Answers -linked group of atoms
nucleus - Correct Answers -center of atom (+) charge (protons and neutrons)
proton - Correct Answers -+ charge
neutron - Correct Answers -no charge
atomic number - Correct Answers -number of protons
mass # - Correct Answers -number of protons and neutrons
electron shell - Correct Answers -orbit followed by electrons around an atomic nucleus
valance shell - Correct Answers -outer shell of atom
valance - Correct Answers -the number of chemical bonds formed by an atom given an
element (# of unpaired electrons)(C-4)
Ion - Correct Answers -atom or molecule that has gained or lost an electron
primary structure - Correct Answers -linear sequence of amino acids
-amino acids being joined together by a peptide bond
peptide group - Correct Answers -has a partial negative charge (double O bond) and the
partial positive charge (H+0)
, -can H bond with other peptide groups, other polar side chains
-interact electrostatic ally with charged side chains
T or F peptide chains are flexible - Correct Answers -T, the bonds on either side can
rotate
secondary structures of proteins - Correct Answers -alpha helix and beta pleated sheets
alpha helix - Correct Answers -the spiral shape resulting from the coiling of a
polypeptide in a protein's secondary structure
beta pleated sheet - Correct Answers -One form of the secondary structure of proteins
in which the polypeptide chain folds back and forth, or where two regions of the chain lie
parallel to each other and are held together by hydrogen bonds.
myoglobin - Correct Answers -stores oxygen in muscle cells (primarily alpha helical
region)
isotope - Correct Answers -form of element with different # of neutrons (same element
that have different masses)
chemical basis of life - Correct Answers -atoms- small molecues- polymers-
macromolecular complexes
monomer - Correct Answers -subunit of polymer
polymer - Correct Answers -multiple monomer
macromolecular complex - Correct Answers -large structure made up of
macromolecules coming together to form a functional complex (2 or more
macromolecules)
life is based on these chemical interactions - Correct Answers -atoms- form small
molecules (ex: amino acids and nucleotides), small molecules- form polymers (ex.
proteins and nucleic acids DNA and RNA, polymers to form macromolecule complexes
(ex. protein+protein=cytoskeleton or protein+nucleic acids=transciption complex)
kinds of chemical interactions (bonding) - Correct Answers -covalent (electron sharing)-
polar covalent, non polar covalent and non covalent (electrostatic)- hydrogen bonding,
ionic bonding, hydrophobic/hydrophyllic, Van Der Waals
molecular formula - Correct Answers -Ammonia NH3
structural formula - Correct Answers -methane
ball and stick model - Correct Answers -water
Answers
4 Macromolecules - Correct Answers -Protein (polypeptides), Lipids (fatty,
phospholipids), carbohydrates (sugars), nucleic acids (DNA, RNA)
Complimentary surfaces - Correct Answers -Lock and key (enzymes and substrates)
(receptors and ligands) (antibodies and antigens)
Structure determines... - Correct Answers -function
atom - Correct Answers -smallest unit of element- electrically neutral
molecule - Correct Answers -linked group of atoms
nucleus - Correct Answers -center of atom (+) charge (protons and neutrons)
proton - Correct Answers -+ charge
neutron - Correct Answers -no charge
atomic number - Correct Answers -number of protons
mass # - Correct Answers -number of protons and neutrons
electron shell - Correct Answers -orbit followed by electrons around an atomic nucleus
valance shell - Correct Answers -outer shell of atom
valance - Correct Answers -the number of chemical bonds formed by an atom given an
element (# of unpaired electrons)(C-4)
Ion - Correct Answers -atom or molecule that has gained or lost an electron
primary structure - Correct Answers -linear sequence of amino acids
-amino acids being joined together by a peptide bond
peptide group - Correct Answers -has a partial negative charge (double O bond) and the
partial positive charge (H+0)
, -can H bond with other peptide groups, other polar side chains
-interact electrostatic ally with charged side chains
T or F peptide chains are flexible - Correct Answers -T, the bonds on either side can
rotate
secondary structures of proteins - Correct Answers -alpha helix and beta pleated sheets
alpha helix - Correct Answers -the spiral shape resulting from the coiling of a
polypeptide in a protein's secondary structure
beta pleated sheet - Correct Answers -One form of the secondary structure of proteins
in which the polypeptide chain folds back and forth, or where two regions of the chain lie
parallel to each other and are held together by hydrogen bonds.
myoglobin - Correct Answers -stores oxygen in muscle cells (primarily alpha helical
region)
isotope - Correct Answers -form of element with different # of neutrons (same element
that have different masses)
chemical basis of life - Correct Answers -atoms- small molecues- polymers-
macromolecular complexes
monomer - Correct Answers -subunit of polymer
polymer - Correct Answers -multiple monomer
macromolecular complex - Correct Answers -large structure made up of
macromolecules coming together to form a functional complex (2 or more
macromolecules)
life is based on these chemical interactions - Correct Answers -atoms- form small
molecules (ex: amino acids and nucleotides), small molecules- form polymers (ex.
proteins and nucleic acids DNA and RNA, polymers to form macromolecule complexes
(ex. protein+protein=cytoskeleton or protein+nucleic acids=transciption complex)
kinds of chemical interactions (bonding) - Correct Answers -covalent (electron sharing)-
polar covalent, non polar covalent and non covalent (electrostatic)- hydrogen bonding,
ionic bonding, hydrophobic/hydrophyllic, Van Der Waals
molecular formula - Correct Answers -Ammonia NH3
structural formula - Correct Answers -methane
ball and stick model - Correct Answers -water
