Bio 181 ASU Exam 1 Questions With Correct
Answers
Primitive prokaryote cell evolved into_________ - answerpro-eukaryotic cell
Eukaryote - answersingle celled organism
Paramecium - answerdistant ancestor of our cells, limited by # of biomolecular machines
within itself
What does a paramecium u...
Cancer cells are anchorage-________________ - answer✔independent
Anchorage-dependent - answer✔uses contact inhibition to stop growth
Anchorage-indepedent - answer✔will keep growing forever given fresh nutrients and space
Limitations of Cell Culture technique - 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 - answer✔scientists manipulate only one of the variables/factors being
tested
Comparative Experiment - answer✔data is gathered from different sources and is not
manipulated and other variables are held constant
Cell size is limited by________ - answer✔the diffusion of gas and nutrients/waste
What does an extant version of a prokaryotic cell have? - answer✔cytoplasm, ribosomes,
nucleoid, plasma membrane, cell wall and capsule
Endomembrane theory - 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? - answer✔allowed for flexibility of the cell
What is the cytoskeleton composed of? - answer✔actin microtubules
Do we know where the cytoskeleton came from? - answer✔NO. genes encoded not found in
bacteria or archaea
The first true eukaryote likely possessed: - 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? - answer✔Mitochondria and chloroplasts
Peroxisomes - answer✔organelles capable of disarming toxic products of oxygen such as
hydrogen peroxide
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