BIOL 200 Questions And Answers With Verified Solutions
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Course
BIOL 200
Institution
BIOL 200
BIOL 200 Questions And Answers With Verified Solutions
What separates the nucleus from the cytosol? ANS the nuclear envelope
The nuclear envelop is part of ... ? ANS the endoplasmic reticulum
What is nucleoplasm and what does it contain? ANS nucleoplasm is what is found within the nucleus...
BIOL 200 Questions And Answers With Verified
Solutions
What separates the nucleus from the cytosol? ANS the nuclear envelope
The nuclear envelop is part of ... ? ANS the endoplasmic reticulum
What is nucleoplasm and what does it contain? ANS nucleoplasm is what is found within the
nucleus and is continuous with the cytosol through the nuclear pore complexes; it contains
chromosomes
what is cytosol? ANS - largest compartment of the cell
- where all protein synthesis occurs
- fluid where all other organelles are suspended
- continuous with the nucleoplasm
what is the endoplasmic reticulum? ANS a network of flattened membranous sacs and vesicles
that occupies much of the cell
what are ribosomes? where are they found? ANS organelles that are the site of synthesis for
proteins transported into the lumen and on the secretory pathway; found on the cystolic surface of the
endoplasmic reticulum
what is the golgi apparatus? ANS series of flattened membranous sacs in which proteins destined
for secretion are modified
how are proteins destined for secretion modified? ANS one way is adding sugars
how do proteins get from the ER to the golgi body? ANS vesicles
, exocytosis ANS when sectretory vesicles bind to the membrane, releasing its contents (which are
usually secretory proteins)
what are lysosomes? what do they do? ANS special vesicles that have digestive enzymes; they
ingest macromolecules and digest them into smaller molecules
what is endocytosis? ANS when the membrane forms a vesicle around macromolecules too big to
be transported across the membrane, "eating" the macromolecules
what are mitochondria? ANS degenerate bacterial symbionts
what do mitochondria do? ANS produce ATP using energy produced by oxidizing small organic
molecules from the cytosol
how many compartments of the mitochondria are there? what are they called? ANS 1) matrix
2) intermembrane space
what are peroxisomes? what do they do? ANS membrane limited bodies containing catalyase and
other enzymes involved in breaking down peroxides and other reactive oxygen compounds
what is the plasma membrane? ANS outer membrane of the cell that separates the interior from
the exterior and directly or indirectly controls the passage of everything into and out of the cell
Flow of biological information (uhh... super simplified?) ANS 1) RNA synthesis in the nucleus
2) out the nuclear pores
3) protein synthesis in the cytosol
path of secretory proteins ANS 1) synthesis in the cytosol
2) proteins move to the lumen of the ER
3) then to the golgi apparatus
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