Bio 1201 Exam 2 – Licata UPDATED
ACTUAL Questions and CORRECT
Answers
What are 2 parts of cell theory? - CORRECT ANSWER - - all organisms are made of cells
-simplest collection of matter that can be alive
where are cells in the biological size range? - CORRECT ANSWER - about the middle
what is microscopy? - CORRECT ANSWER - how you see things
describe scanning electron microscopes - CORRECT ANSWER - -focus electrons onto the
surface of the specimen, producing 2-D pictures
-used for smaller than cellular looking
describe transmission electron microscopes - CORRECT ANSWER - -focus beam of
electrons through a specimen, producing 2-D pictures
-used for smaller than cellular looking
what are both TEM and SEM microscopes used for? - CORRECT ANSWER - discerning
cellular anatomy
what is cellular fractionation, and a method of cellular fractionation? - CORRECT
ANSWER - -takes cells apart and separates the major organelles from one another
-centrifuges: fractionate cells into their component parts; harder you spin it, the smaller
organelles you get
-used for discerning cellular anatomy
,what are the basic features of both prokaryotic and eukaryotic cells? - CORRECT
ANSWER - -plasma membrane
-semifluid substance called cytosol
-chromosomes that carry genes
-ribosomes that make proteins
characteristics of a prokaryotic cell - CORRECT ANSWER - -no defined nucleus
-DNA in unbound nucleoid
-no membrane bound organelles
-100x smaller than eukaryotic cells
-flagella for movement (a lot, not all)
-a lot have cell walls
characteristics of a eukaryotic cell - CORRECT ANSWER - -DNA in membrane-bound
nucleus
-membrane-bound organelles
-endomembrane system (inner membrane)
-larger than prokaryotic cells
-plant and animal cells have. many shared organelles
What do plant cells have that animal cells don't? - CORRECT ANSWER - cellulose, cell
wall, chloroplasts, central vacuole
what is in the nucleus? - CORRECT ANSWER - DNA, nuclear envelope, nuclear
membrane, nuclear pores, chromatin/chromosomes, nucleolis, ribosomes, lamina
What is the nuclear envelope? - CORRECT ANSWER - it encloses the nucleus
what is the nuclear membrane? - CORRECT ANSWER - a lipid bilayer
, what are nuclear pores - CORRECT ANSWER - they regulate the entry and exit of
molecules
what is the lamina? - CORRECT ANSWER - -maintains shape of nucleus
-composed of protein
-is a support structure
what kind of membrane do organelles in eukaryotic cells have? - CORRECT ANSWER -
double membrane
what is chromatin? - CORRECT ANSWER - -where the DNA is
-wraps around proteins, which forms chromatin structures
what do chromatin structures form as they condense when preparing for cell division? -
CORRECT ANSWER - chromosomes
what is the nucleolis? - CORRECT ANSWER - -makes ribosomal DNA (rRNA)
what is a chromosome? - CORRECT ANSWER - -a single DNA molecule associated with
proteins
what are ribosomes and what do they do? - CORRECT ANSWER - -particles made of
rRNA and protein
-carry out protein synthesis by using mRNA (messenger RNA)
where are ribosomes found? - CORRECT ANSWER - -floating around in cytosol (free
ribosomes)
-bound to rough endoplasmic reticulum (bound ribosomes)
ACTUAL Questions and CORRECT
Answers
What are 2 parts of cell theory? - CORRECT ANSWER - - all organisms are made of cells
-simplest collection of matter that can be alive
where are cells in the biological size range? - CORRECT ANSWER - about the middle
what is microscopy? - CORRECT ANSWER - how you see things
describe scanning electron microscopes - CORRECT ANSWER - -focus electrons onto the
surface of the specimen, producing 2-D pictures
-used for smaller than cellular looking
describe transmission electron microscopes - CORRECT ANSWER - -focus beam of
electrons through a specimen, producing 2-D pictures
-used for smaller than cellular looking
what are both TEM and SEM microscopes used for? - CORRECT ANSWER - discerning
cellular anatomy
what is cellular fractionation, and a method of cellular fractionation? - CORRECT
ANSWER - -takes cells apart and separates the major organelles from one another
-centrifuges: fractionate cells into their component parts; harder you spin it, the smaller
organelles you get
-used for discerning cellular anatomy
,what are the basic features of both prokaryotic and eukaryotic cells? - CORRECT
ANSWER - -plasma membrane
-semifluid substance called cytosol
-chromosomes that carry genes
-ribosomes that make proteins
characteristics of a prokaryotic cell - CORRECT ANSWER - -no defined nucleus
-DNA in unbound nucleoid
-no membrane bound organelles
-100x smaller than eukaryotic cells
-flagella for movement (a lot, not all)
-a lot have cell walls
characteristics of a eukaryotic cell - CORRECT ANSWER - -DNA in membrane-bound
nucleus
-membrane-bound organelles
-endomembrane system (inner membrane)
-larger than prokaryotic cells
-plant and animal cells have. many shared organelles
What do plant cells have that animal cells don't? - CORRECT ANSWER - cellulose, cell
wall, chloroplasts, central vacuole
what is in the nucleus? - CORRECT ANSWER - DNA, nuclear envelope, nuclear
membrane, nuclear pores, chromatin/chromosomes, nucleolis, ribosomes, lamina
What is the nuclear envelope? - CORRECT ANSWER - it encloses the nucleus
what is the nuclear membrane? - CORRECT ANSWER - a lipid bilayer
, what are nuclear pores - CORRECT ANSWER - they regulate the entry and exit of
molecules
what is the lamina? - CORRECT ANSWER - -maintains shape of nucleus
-composed of protein
-is a support structure
what kind of membrane do organelles in eukaryotic cells have? - CORRECT ANSWER -
double membrane
what is chromatin? - CORRECT ANSWER - -where the DNA is
-wraps around proteins, which forms chromatin structures
what do chromatin structures form as they condense when preparing for cell division? -
CORRECT ANSWER - chromosomes
what is the nucleolis? - CORRECT ANSWER - -makes ribosomal DNA (rRNA)
what is a chromosome? - CORRECT ANSWER - -a single DNA molecule associated with
proteins
what are ribosomes and what do they do? - CORRECT ANSWER - -particles made of
rRNA and protein
-carry out protein synthesis by using mRNA (messenger RNA)
where are ribosomes found? - CORRECT ANSWER - -floating around in cytosol (free
ribosomes)
-bound to rough endoplasmic reticulum (bound ribosomes)
