1|Page
MICROBIOLOGY RIO SALADO 1-7 EXAM LATEST 2025 ACTUAL
EXAM WITH COMPLETE QUESTIONS AND CORRECT DETAILED
ANSWERS (100% VERIFIED ANSWERS) |ALREADY GRADED A+|
||PROFESSOR VERIFIED|| ||BRANDNEW!!!||
How can prokaryotic cells be smaller than eukaryotic cells and still
carry on all the functions of life? - ANSWER-Prokaryotic cells
have a good surface area to volume ratio. They contain 1 circular
chromosome and no membrane bound organelles. All of their
chemical activity occurs in the cytoplasm and cell membrane.
They have all they need at this minimal functional level.
Plasma membranes - ANSWER-Prokaryotes - primary consist of
phospholipids
Eukaryotes - contain carbs and sterols
damaging the plasma membrane - ANSWER-alcohols and
ammonium compounds - disinfectants
by disrupting the membrane phospholipid a group of antibiotics
polymyxins cause leakage of intracellular contents resulting in cell
death
,2|Page
passive processes - ANSWER-substances cross the membrane
from an area of high concentration to an area of low
concentrations without spending any energy
active processes - ANSWER-the cell must use energy ATP to
move substances from areas of low concentration to high
plasmids - ANSWER-small circular double stranded DNA
molecules - not crucial for the cells survival but may carry genes
for antibiotic resistance, production of toxins, and synthesis of
enzymes.
plasmid DNA is used for gene manipulation in biotechnology
ribosomes - ANSWER-both types of cell have them, they are used
as the sites of protein synthesis
Prokaryotic cells differ in the number of proteins and rRNA
molecules they contain they are also smaller and less dense than
ribosomes of eukaryotic cells
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antibiotics work by inhibiting protein synthesis on prokaryotic
ribosomes
Distinguish clearly between prokaryotic cells and eukaryotic cells -
ANSWER-Pro- no nuclear membrane, no enclosed organelles,
flagella consisting of two protein building blocks cell wall present
and complex, plasma membrane doesn't have sterols or carbs, no
cytoskeleton, smaller in size, cells divide by binary fission
Euka- has a true nucleus, has multiple organelles, flagella is
complex, cell wall when present is simple, plasma membrane
consists of sterols and carbs, has a cytoskeleton, larger, histones,
cell divison by mitosis
Flagellum - eukaryotic - ANSWER-moves in a wave like manner
cell wall - eukaryotic - ANSWER-does not contain peptidoglycan
which is significant medically because this is what a lot of
antibiotics act against.
, 4|Page
cytoskeleton - ANSWER-consists of microfilaments, microtubules
and provides shape support and assets in transporting
substances through the cell.
endocytosis - ANSWER-segment of the plasma membrane
surrounds a paericle or large molecule and encloses it and brings
it into the cell - phagocytosis and pinocytosis
ribosomes - eukart - ANSWER-different because there are more
of them and they are made in the nucleus and then are released
to the cystol
nucleus - ANSWER-most characteristic of the eukaryotic cell it
contains almost all of the cells DNA
nucleosome - ANSWER-165 base pairs of DNA and 9 molecules
of histones
endoplasmic reticulum - ANSWER-extensive network of flattened
membranes
MICROBIOLOGY RIO SALADO 1-7 EXAM LATEST 2025 ACTUAL
EXAM WITH COMPLETE QUESTIONS AND CORRECT DETAILED
ANSWERS (100% VERIFIED ANSWERS) |ALREADY GRADED A+|
||PROFESSOR VERIFIED|| ||BRANDNEW!!!||
How can prokaryotic cells be smaller than eukaryotic cells and still
carry on all the functions of life? - ANSWER-Prokaryotic cells
have a good surface area to volume ratio. They contain 1 circular
chromosome and no membrane bound organelles. All of their
chemical activity occurs in the cytoplasm and cell membrane.
They have all they need at this minimal functional level.
Plasma membranes - ANSWER-Prokaryotes - primary consist of
phospholipids
Eukaryotes - contain carbs and sterols
damaging the plasma membrane - ANSWER-alcohols and
ammonium compounds - disinfectants
by disrupting the membrane phospholipid a group of antibiotics
polymyxins cause leakage of intracellular contents resulting in cell
death
,2|Page
passive processes - ANSWER-substances cross the membrane
from an area of high concentration to an area of low
concentrations without spending any energy
active processes - ANSWER-the cell must use energy ATP to
move substances from areas of low concentration to high
plasmids - ANSWER-small circular double stranded DNA
molecules - not crucial for the cells survival but may carry genes
for antibiotic resistance, production of toxins, and synthesis of
enzymes.
plasmid DNA is used for gene manipulation in biotechnology
ribosomes - ANSWER-both types of cell have them, they are used
as the sites of protein synthesis
Prokaryotic cells differ in the number of proteins and rRNA
molecules they contain they are also smaller and less dense than
ribosomes of eukaryotic cells
,3|Page
antibiotics work by inhibiting protein synthesis on prokaryotic
ribosomes
Distinguish clearly between prokaryotic cells and eukaryotic cells -
ANSWER-Pro- no nuclear membrane, no enclosed organelles,
flagella consisting of two protein building blocks cell wall present
and complex, plasma membrane doesn't have sterols or carbs, no
cytoskeleton, smaller in size, cells divide by binary fission
Euka- has a true nucleus, has multiple organelles, flagella is
complex, cell wall when present is simple, plasma membrane
consists of sterols and carbs, has a cytoskeleton, larger, histones,
cell divison by mitosis
Flagellum - eukaryotic - ANSWER-moves in a wave like manner
cell wall - eukaryotic - ANSWER-does not contain peptidoglycan
which is significant medically because this is what a lot of
antibiotics act against.
, 4|Page
cytoskeleton - ANSWER-consists of microfilaments, microtubules
and provides shape support and assets in transporting
substances through the cell.
endocytosis - ANSWER-segment of the plasma membrane
surrounds a paericle or large molecule and encloses it and brings
it into the cell - phagocytosis and pinocytosis
ribosomes - eukart - ANSWER-different because there are more
of them and they are made in the nucleus and then are released
to the cystol
nucleus - ANSWER-most characteristic of the eukaryotic cell it
contains almost all of the cells DNA
nucleosome - ANSWER-165 base pairs of DNA and 9 molecules
of histones
endoplasmic reticulum - ANSWER-extensive network of flattened
membranes
