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BIOL 203 (Purdue) EXAM 1 QUESTIONS AND ANSWERS RATED A.
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BIOL 203 (Purdue) EXAM 1 QUESTIONS AND ANSWERS RATED A.
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BIOL 203 (Purdue) EXAM 1 QUESTIONSAND ANSWERS RATED A.
peroxisomes
Correct Answer -break Dow fatty acids, synthesize cholesterol, and make
parts of the myelin sheath
centrosome
Correct Answer -area where microtubules are produced
microfilaments
Correct Answer -involved in cellular movements
microtubules
Correct Answer -form internal skeleton
inclusions
Correct Answer -lipid droplets, glycogen granules, and melanin granules
movement through the cell membrane
without energy
Correct Answer -diffusion
facilitated diffusion - channels
osmosis
movement through the cell membrane with energy
Correct Answer -active transport - carrier proteins endocytosis
,exocytosis
endocytosis
Correct Answer -phagocytosis: engulfing particles
pinocytosis-internalization of fluids in the form of tiny droplets
receptor-mediated endocytosis- certain molecules are taken in due to
receptor
exocytosis
Correct Answer -vesicles fusing with the cell membrane and opening out
to the outside
cells that do not divide
Correct Answer -skeletal and muscle
differentiated neurons
cell division
Correct Answer -
epigenetic s
Correct Answer -dan methylation: causes transcription; silencing
tumor suppressor genes
Correct Answer -inactivation of a tsg causes cancer if both genes are
inactivated
viruses can inactivate it
, porto-oncogenes
Correct Answer -activation causes cancer
viruses can activate it
retinoblastoma tumor supressor gene
Correct Answer -it doesnt allow cells to divide
retinoblastoma : childhood tumors of the retina of the eye
that can lead to loss of the eye
p53 tumor surpresos gene
Correct Answer -most frequently mutated
(protein atomic weight)
apoptosis
Correct Answer -cell shrinks and may round up
their dna breaks up and the chromatin condenses
the nucleus breaks up into masses of condensed chromatin
cell develops blebs
blebs are phagocytized by surrounding macrophages
necrosis
Correct Answer -accidental cell death
cell and mitochondria change shape, swell, and lose their function
membranes break down
cells and organelles undergo lysis
substances are released that trigger inflammation
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