PCB 3134 FINAL EXAM QUESTIONS WITH
ACCURATE ANSWERS
1 mm = ________ nm - ANSWER A) 1,000,000
You wish to obtain a purified sample of mitochondria from lysed cells. The best
way to obtainthis sample would be - ANSWER centrifugation
Which type of microscopy has the greatest resolving power? - ANSWER A)
Electron microscopy
A peptide bond - ANSWER is a covalent bond between the carboxyl carbon of
one amino acid and the amino nitrogen ofa second amino acid.
Which of the following statements is false? - ANSWER Equal amounts of D- and
L-amino acids are found in cells.
Which of the following is not a major functional class of proteins? - ANSWER A)
Hereditary proteins
Which of the following classes of amino acids are more likely to be found in the
center of amembrane bilayer? - ANSWER nonpolar
Which of the following is a possible function of a terpene? - ANSWER Vitamin
) Which of the following pairs correctly matches the monomer with its polymer? -
ANSWER E) Nucleotides; nucleic acids
) Fatty acids are ________, and they function in the cell as ________. - ANSWER
long, unbranched hydrocarbon chains with a carboxyl group at one end;
building blocks forother lipids
) The components of a nucleotide are - ANSWER a five-carbon sugar, a
phosphate group, and a nitrogen-containing aromatic base.
) The function of triglycerides is - ANSWER A) to store energy.
Which of the following is not one of the six classes of lipids? - ANSWER Pectins
Which statement accurately describes sphingolipids? - ANSWER Sphingolipids
are essential components of cell membranes, contributing to their fluidity
andstability
,) Which of the following is characteristic of eukaryotic cells? - ANSWER
Membrane-bounded nucleus
When the size of a cell increases, the surface area/volume ratio - ANSWER
decreases
Which of the following is least likely to be part of a cell membrane? - ANSWER
Peptidoglycans
A protein is destined to be secreted from a cell. In which organelle would you
expect to findthe protein just after it is produced in the rough endoplasmic
reticulum? - ANSWER D) Golgi apparatus
) Which of the following organelles has only a single membrane around it? -
ANSWER Peroxisome
An enzyme - ANSWER binds substrates in a manner that facilitates the formation
of product
The site on an enzyme that will bind the substrate and participate in catalysis is
called the - ANSWER C) active site.
Which of the following variables is not part of the Michaelis—Menten equation? -
ANSWER kD
Monosaccharides are joined together into polysaccharides by bonds called -
ANSWER glycosidic bonds
The carbon atom in a cyclic sugar that has two oxygens attached to it is called
the__________ carbon - ANSWER anomeric
Similar to a domain in protein structure, a _______ is a small segment of
peptidesequence that forms a discrete compact organization of secondary
structures, which whencombined can make higher order structures - ANSWER
__motif_____
Collagen fibers are to the extracellular matrix as _______________ is to the cell
wall - ANSWER cellulose or peptidoglycan
Name four individuals who we discussed in class who contributed to the
formation ofcell theory prior to 1900s. - ANSWER Robert HookeAntonie van
LeeuwenhoekRobert BrownMatthias SchleidenThomas SchwannRudolf Virchow
__________________ are viruses that infect bacteria. - ANSWER bacteriophage
, _________________ is how bacterial and archaeal cells replicate their DNAand
divide - ANSWER binary fission
Structurally, starch exists as both unbranched polysaccharide chains
called_____________ and branched polysaccharide chains
called____________________. - ANSWER amylose, amylopectin
Collagen fibers are to the extracellular matrix as _____________________ is to
thecell wall. - ANSWER cellulose
Ribosomal subunits are referred to by number and letter combinations (e.g.,
70S). The "S"refers to __________ - ANSWER Svedberg unit
__________ are infectious RNAs that are responsible for diseases in several
cropplants, such as tobacco. - ANSWER viroids
The ______________ velocity of an enzymatic reaction is the velocity at very
highsubstrate concentration - ANSWER maximum
You are working on a project that involves the direct observation of DNA
molecules. Themicroscope that would give you the best information at this time
would be the - ANSWER C) transmission electron microscope.
If a protein is exported from the ER and then packaged in the Golgi, but not
secreted through a secretory vesicle, then it is typically sent to the __ - ANSWER
lysosome or endosome either is acceptible
A regular pattern of hydrogen bonding is most important in stabilizing the
________structure of many proteins - ANSWER secondary
Two proteins associated with a rare neurodegenerative disorder have been
sequenced.Protein A contains many polar amino acids with small regions
containing nonpolar, hydrophobicamino acids. Protein B is rich in nonpolar,
hydrophobic amino acids with only two small regions containing polar amino
acids. What might this suggest about the two proteins? - ANSWER Protein A may
be a cytoplasmic protein and Protein B may be a membrane associateprotein.
Cellulose belongs to which of the following groups of macromolecules -
ANSWER B) Carbohydrates
Which of the following has the greatest number of glycosidic bonds - ANSWER
Amylose
The components of a nucleotide are - ANSWER B) a five-carbon sugar, a
phosphate group, and a nitrogen-containing aromatic base.
ACCURATE ANSWERS
1 mm = ________ nm - ANSWER A) 1,000,000
You wish to obtain a purified sample of mitochondria from lysed cells. The best
way to obtainthis sample would be - ANSWER centrifugation
Which type of microscopy has the greatest resolving power? - ANSWER A)
Electron microscopy
A peptide bond - ANSWER is a covalent bond between the carboxyl carbon of
one amino acid and the amino nitrogen ofa second amino acid.
Which of the following statements is false? - ANSWER Equal amounts of D- and
L-amino acids are found in cells.
Which of the following is not a major functional class of proteins? - ANSWER A)
Hereditary proteins
Which of the following classes of amino acids are more likely to be found in the
center of amembrane bilayer? - ANSWER nonpolar
Which of the following is a possible function of a terpene? - ANSWER Vitamin
) Which of the following pairs correctly matches the monomer with its polymer? -
ANSWER E) Nucleotides; nucleic acids
) Fatty acids are ________, and they function in the cell as ________. - ANSWER
long, unbranched hydrocarbon chains with a carboxyl group at one end;
building blocks forother lipids
) The components of a nucleotide are - ANSWER a five-carbon sugar, a
phosphate group, and a nitrogen-containing aromatic base.
) The function of triglycerides is - ANSWER A) to store energy.
Which of the following is not one of the six classes of lipids? - ANSWER Pectins
Which statement accurately describes sphingolipids? - ANSWER Sphingolipids
are essential components of cell membranes, contributing to their fluidity
andstability
,) Which of the following is characteristic of eukaryotic cells? - ANSWER
Membrane-bounded nucleus
When the size of a cell increases, the surface area/volume ratio - ANSWER
decreases
Which of the following is least likely to be part of a cell membrane? - ANSWER
Peptidoglycans
A protein is destined to be secreted from a cell. In which organelle would you
expect to findthe protein just after it is produced in the rough endoplasmic
reticulum? - ANSWER D) Golgi apparatus
) Which of the following organelles has only a single membrane around it? -
ANSWER Peroxisome
An enzyme - ANSWER binds substrates in a manner that facilitates the formation
of product
The site on an enzyme that will bind the substrate and participate in catalysis is
called the - ANSWER C) active site.
Which of the following variables is not part of the Michaelis—Menten equation? -
ANSWER kD
Monosaccharides are joined together into polysaccharides by bonds called -
ANSWER glycosidic bonds
The carbon atom in a cyclic sugar that has two oxygens attached to it is called
the__________ carbon - ANSWER anomeric
Similar to a domain in protein structure, a _______ is a small segment of
peptidesequence that forms a discrete compact organization of secondary
structures, which whencombined can make higher order structures - ANSWER
__motif_____
Collagen fibers are to the extracellular matrix as _______________ is to the cell
wall - ANSWER cellulose or peptidoglycan
Name four individuals who we discussed in class who contributed to the
formation ofcell theory prior to 1900s. - ANSWER Robert HookeAntonie van
LeeuwenhoekRobert BrownMatthias SchleidenThomas SchwannRudolf Virchow
__________________ are viruses that infect bacteria. - ANSWER bacteriophage
, _________________ is how bacterial and archaeal cells replicate their DNAand
divide - ANSWER binary fission
Structurally, starch exists as both unbranched polysaccharide chains
called_____________ and branched polysaccharide chains
called____________________. - ANSWER amylose, amylopectin
Collagen fibers are to the extracellular matrix as _____________________ is to
thecell wall. - ANSWER cellulose
Ribosomal subunits are referred to by number and letter combinations (e.g.,
70S). The "S"refers to __________ - ANSWER Svedberg unit
__________ are infectious RNAs that are responsible for diseases in several
cropplants, such as tobacco. - ANSWER viroids
The ______________ velocity of an enzymatic reaction is the velocity at very
highsubstrate concentration - ANSWER maximum
You are working on a project that involves the direct observation of DNA
molecules. Themicroscope that would give you the best information at this time
would be the - ANSWER C) transmission electron microscope.
If a protein is exported from the ER and then packaged in the Golgi, but not
secreted through a secretory vesicle, then it is typically sent to the __ - ANSWER
lysosome or endosome either is acceptible
A regular pattern of hydrogen bonding is most important in stabilizing the
________structure of many proteins - ANSWER secondary
Two proteins associated with a rare neurodegenerative disorder have been
sequenced.Protein A contains many polar amino acids with small regions
containing nonpolar, hydrophobicamino acids. Protein B is rich in nonpolar,
hydrophobic amino acids with only two small regions containing polar amino
acids. What might this suggest about the two proteins? - ANSWER Protein A may
be a cytoplasmic protein and Protein B may be a membrane associateprotein.
Cellulose belongs to which of the following groups of macromolecules -
ANSWER B) Carbohydrates
Which of the following has the greatest number of glycosidic bonds - ANSWER
Amylose
The components of a nucleotide are - ANSWER B) a five-carbon sugar, a
phosphate group, and a nitrogen-containing aromatic base.
