Homework 2 Flashcards
T or F: fungi do not use spores for reproduction but rather as a means to survive dangerous environmental conditions
false
this type of endocytosis is where a cell “drinks” small dissolved substances via vesicles
pinocytosis
what is the primary site of lipid production in a eukaryotic cell
smooth ER
T or F: microtubules are large hollow structures made of actin that form spindles during cell division
false
the technical term for unicellular fungi
yeast
T or F: lysosomes are vesicles that contain hydrolytic enzymes that can damage other cells and viruses
true
the chloroplast and this organelle are derived from ancient bacteria via different endosymbiotic events
mitochondria
cilia
small projections that can be synchronized in a rowing motion for motility
chromatin
loosely packed DNA and associated proteins
chloroplast
site of photosynthesis in plant cells
flagella
large projection, encased in plasma membrane, that uses tubulin fibers for motility
T or F: all cellular respiration uses oxygen as its terminal electron acceptor
false
halophile
thrives in high salt environments
alkaliphile
thrives in basic pH environments
obligate aerobe
only grows when oxygen is present
facultative anaerobe
grows best with oxygen but can grow anaerobically
you allow a bacterial sample to two hours and observe four rounds of cell division. calculate the generation time, in minutes, for this bacteria
30
lag phase
cells in a new environment begin to turn on metabolic pathways, but are not growing
log phase
cells are doubling at the maximum rate allowed by the environment
stationary phase
number of cells dying is equal to the number of cells dividing
death phase
cells are dying at a faster rate than new cells are being produced
T or F: most important human pathogens are mesophiles because this temperate range includes that of the human body
true
this metabolic process uses pyruvic acid to sustain ATP production in the absence of a respiratory chain
fermentation
T or F: anabolic pathways use energy to construct large macromolecules from smaller subunits
true
