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Bio 181 ASU Exam 1 Questions With Correct Answers

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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...

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  • November 11, 2024
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©THEBRIGHT EXAM SOLUTIONS

11/7/2024 12:35 PM


Bio 181 ASU Exam 1 Questions With Correct
Answers




Primitive prokaryote cell evolved into_________ - answer✔pro-eukaryotic cell

Eukaryote - answer✔single celled organism

Paramecium - answer✔distant ancestor of our cells, limited by # of biomolecular machines
within itself

What does a paramecium use cilia for? - answer✔to move

What was the precursor to our kidneys? - answer✔contractile vacuole

SEM(Scanning Electron Microscopy) - answer✔cannot view living cells

What can parameciums o as a defense technique against predators? - answer✔they can shed
their cilia

Cells "walk" with ______ and ________ - answer✔lamelipodium an fillapodium

How do you distinguish the front and the back of the cell? - answer✔the front has
lamelipodium and filapodium, the back has retraction fibers

Focus - answer✔clump of cancer cells

Phase Contrast Microscopy - answer✔can watch living cells move, light microscopy

Retraction Fiber - 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? - answer✔elasticity and the plasma
membrane

Normal cells are anchorage-_______________ - answer✔dependent

, ©THEBRIGHT EXAM SOLUTIONS

11/7/2024 12:35 PM

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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