cycle 1 Flashcards
why are chlamy considered a model system?
facilitates research regarding ciliopathies
genetically identical (easy to alter gene structures and compare to unaltered)
easy to experiment on (smaller, simpler)
used to help explain phenomenon in more complex organisms
why would chlamy exhibit negative phototaxis?
D1 protein abundance drops dramatically at high light intensities and then recovers, not at the same abundance as the initial amount.
why do chlamy (and humans) need phosphate and iron?
phosphate - in ATP (energy-dependent processes), synthesis of genetic material (growth, development, reproduction), cellular signaling pathways (phosphorylation), phospholipid bilayer, glycolysis
iron - ETC (cellular respiration, generates ATP), oxygen transport (Hb, metabolism), metabolic processes (energy production, DNA synthesis)
why do cells stop dividing in the stationary phase?
cells use up TAP media, run out of at least one critical components. amount of resources not enough to sustain them all. birth rate = death rate
why do chlamy and humans have flagella but plants don’t?
from common ancestor, not necessary in plants, energy cost, was not evolutionarily advantageous to keep
why would chlamy cells display negative phototaxis?
