Bio 181 ASU Exam 1 with all Correct & 100%
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Primitive prokaryote cell evolved into_________ ✔Correct Answer--pro-eukaryotic cell
Eukaryote ✔Correct Answer--single celled organism
Paramecium ✔Correct Answer--distant ancestor of our cells, limited by # of biomolecular machines
within itself
What does a paramecium use cilia for? ✔Correct Answer--to move
What was the precursor to our kidneys? ✔Correct Answer--contractile vacuole
SEM(Scanning Electron Microscopy) ✔Correct Answer--cannot view living cells
What can parameciums o as a defense technique against predators? ✔Correct Answer--they can
shed their cilia
Cells "walk" with ______ and ________ ✔Correct Answer--lamelipodium an fillapodium
How do you distinguish the front and the back of the cell? ✔Correct Answer--the front has
lamelipodium and filapodium, the back has retraction fibers
Focus ✔Correct Answer--clump of cancer cells
Phase Contrast Microscopy ✔Correct Answer--can watch living cells move, light microscopy
Retraction Fiber ✔Correct Answer--the first lamelipodia, stretches until it breaks and then releases
cytoplasm and is reabsorbed into the cell
How can a cell stretch their parts so extensively? ✔Correct Answer--elasticity and the plasma
membrane
Normal cells are anchorage-_______________ ✔Correct Answer--dependent
Cancer cells are anchorage-________________ ✔Correct Answer--independent
Anchorage-dependent ✔Correct Answer--uses contact inhibition to stop growth
Anchorage-indepedent ✔Correct Answer--will keep growing forever given fresh nutrients and
space
Limitations of Cell Culture technique ✔Correct Answer--1) not all cells will grow in a culture
2) cells lose their histotype in vivoshape and 3d structure of tissue is changed
3)metabolism likely changes
, Controlled Experiment ✔Correct Answer--scientists manipulate only one of the variables/factors
being tested
Comparative Experiment ✔Correct Answer--data is gathered from different sources and is not
manipulated and other variables are held constant
Cell size is limited by________ ✔Correct Answer--the diffusion of gas and nutrients/waste
What does an extant version of a prokaryotic cell have? ✔Correct Answer--cytoplasm, ribosomes,
nucleoid, plasma membrane, cell wall and capsule
Endomembrane theory ✔Correct Answer--an infolded plasma membrane attached to a
chromosome in an ancestral prokaryote may have led to formation of plasma membrane.
endocytosis would have needed to occur
What was the advantage of losing the cell wall? ✔Correct Answer--allowed for flexibility of the cell
What is the cytoskeleton composed of? ✔Correct Answer--actin microtubules
Do we know where the cytoskeleton came from? ✔Correct Answer--NO. genes encoded not found
in bacteria or archaea
The first true eukaryote likely possessed: ✔Correct Answer--1) cytoskeleton
2)nuclear envelope
3) may have had an associated endoplasmic reticulum and golgi apparatus
4)one or more flagella possibly
What did the endosymbiotic theory develop? ✔Correct Answer--Mitochondria and chloroplasts
Peroxisomes ✔Correct Answer--organelles capable of disarming toxic products of oxygen such as
hydrogen peroxide
Approximately when did the first cells form on earth? ✔Correct Answer--3.5 billion years ago
What are the major differences in plant eukaryotic cells? ✔Correct Answer--cell wall, chloroplasts
and a large vacuole
What % water are we? ✔Correct Answer--50-70%
What are biological membranes composed of? ✔Correct Answer--mostly lipids and proteins
Two functions of biological membranes ✔Correct Answer--partition water and compartmentalize
enzymes to increase efficiency of chemical reactions
Plasma Membrane ✔Correct Answer--the outer boundary of life
Internal Membranes ✔Correct Answer--exist in eukaryotic cells, names after their internal
component; ie. golgi membrane for the golgi apparatus
Verified Answers |Latest Update| Already Graded
A+ (Just Released)
Primitive prokaryote cell evolved into_________ ✔Correct Answer--pro-eukaryotic cell
Eukaryote ✔Correct Answer--single celled organism
Paramecium ✔Correct Answer--distant ancestor of our cells, limited by # of biomolecular machines
within itself
What does a paramecium use cilia for? ✔Correct Answer--to move
What was the precursor to our kidneys? ✔Correct Answer--contractile vacuole
SEM(Scanning Electron Microscopy) ✔Correct Answer--cannot view living cells
What can parameciums o as a defense technique against predators? ✔Correct Answer--they can
shed their cilia
Cells "walk" with ______ and ________ ✔Correct Answer--lamelipodium an fillapodium
How do you distinguish the front and the back of the cell? ✔Correct Answer--the front has
lamelipodium and filapodium, the back has retraction fibers
Focus ✔Correct Answer--clump of cancer cells
Phase Contrast Microscopy ✔Correct Answer--can watch living cells move, light microscopy
Retraction Fiber ✔Correct Answer--the first lamelipodia, stretches until it breaks and then releases
cytoplasm and is reabsorbed into the cell
How can a cell stretch their parts so extensively? ✔Correct Answer--elasticity and the plasma
membrane
Normal cells are anchorage-_______________ ✔Correct Answer--dependent
Cancer cells are anchorage-________________ ✔Correct Answer--independent
Anchorage-dependent ✔Correct Answer--uses contact inhibition to stop growth
Anchorage-indepedent ✔Correct Answer--will keep growing forever given fresh nutrients and
space
Limitations of Cell Culture technique ✔Correct Answer--1) not all cells will grow in a culture
2) cells lose their histotype in vivoshape and 3d structure of tissue is changed
3)metabolism likely changes
, Controlled Experiment ✔Correct Answer--scientists manipulate only one of the variables/factors
being tested
Comparative Experiment ✔Correct Answer--data is gathered from different sources and is not
manipulated and other variables are held constant
Cell size is limited by________ ✔Correct Answer--the diffusion of gas and nutrients/waste
What does an extant version of a prokaryotic cell have? ✔Correct Answer--cytoplasm, ribosomes,
nucleoid, plasma membrane, cell wall and capsule
Endomembrane theory ✔Correct Answer--an infolded plasma membrane attached to a
chromosome in an ancestral prokaryote may have led to formation of plasma membrane.
endocytosis would have needed to occur
What was the advantage of losing the cell wall? ✔Correct Answer--allowed for flexibility of the cell
What is the cytoskeleton composed of? ✔Correct Answer--actin microtubules
Do we know where the cytoskeleton came from? ✔Correct Answer--NO. genes encoded not found
in bacteria or archaea
The first true eukaryote likely possessed: ✔Correct Answer--1) cytoskeleton
2)nuclear envelope
3) may have had an associated endoplasmic reticulum and golgi apparatus
4)one or more flagella possibly
What did the endosymbiotic theory develop? ✔Correct Answer--Mitochondria and chloroplasts
Peroxisomes ✔Correct Answer--organelles capable of disarming toxic products of oxygen such as
hydrogen peroxide
Approximately when did the first cells form on earth? ✔Correct Answer--3.5 billion years ago
What are the major differences in plant eukaryotic cells? ✔Correct Answer--cell wall, chloroplasts
and a large vacuole
What % water are we? ✔Correct Answer--50-70%
What are biological membranes composed of? ✔Correct Answer--mostly lipids and proteins
Two functions of biological membranes ✔Correct Answer--partition water and compartmentalize
enzymes to increase efficiency of chemical reactions
Plasma Membrane ✔Correct Answer--the outer boundary of life
Internal Membranes ✔Correct Answer--exist in eukaryotic cells, names after their internal
component; ie. golgi membrane for the golgi apparatus
