Lesson 3 "The Riot and the Dance" Flashcards
How do prokaryotic cells differ from eukaryotic cells in regard to a nucleus?
prokaryotes do not have a nucleus
How do prokaryotic cells differ from eukaryotic cells in regard to organelles?
prokaryotes do not have distinct, membrane-bounded organelles
How do prokaryotic cells differ from eukaryotic cells in regard to size?
usually, prokaryotes are smaller than 10um. Usually, eukaryotes are larger than 10um.
What life forms have prokaryotic cells?
bacteria and blue-green alge
What life forms have eukaryotic cells?
protozoa, algae, fungi, plants, and animals
Why can’t cells be big?
If we increase the cell diameter, the volume increases to a much greater degree than the surface area. Its metabolic demands would be too much for its membrane to cope with.
What fundamental property of matter causes diffusion?
Brownian motion
How does concentration, temperature, and molecular size affect diffusion rate?
higher concentration; quicker diffusion
higher temperature; quicker diffusion
smaller size; quicker diffusion
A substance dissolved in a solvent is a
solute
if a plant cell is placed in a hypertonic solution, it will ____ water
lose water. This condition is called: Plasmolysis
if a plan cell is placed in a hypotonic solution, it will _____ water
gain water. This condition is called Cytolysis
If a cell undergoes plasmolysis, the turgor pressure will…
decrease
movement of a substance across a membrane, through a protein gate but against a concentration gradient is called…
active transport
the engulfing of a food particle by a cell so that a food vacuole is formed is called…
endocytosis; “phago” for solids “pino” for liquids”
the ____ contains the vast majority of DNA and is covered in a _________ layered envelope containing pores.
nucleus; double-double (double bilayer)
