BSCI 1510 FINAL EXAM
BSCI 1510 FINAL EXAM QUESTIONS AND ANSWERS GRADED A+
What outcome is favoured by high adrenaline
(epinephrine) and low insulin? ANS >> elevated oxidative
phosphorylation
eukaryotic cells ANS >> Have a true nucleus are larger than
prokaryotic cells and are found in all living things except
bacteria
endocytosis and exocytosis ANS >> types of active
transport
secretory pathway ANS >> Rough ER -> Golgi -> secretory
vesicles -> cell exterior
,BSCI 1510 FINAL EXAM
Smooth Endoplasmic Reticulum ANS >> An endomembrane
system where lipids are synthesized, calcium levels are
regulated, and toxic substances are broken down.
Rough Endoplasmic Reticulum ANS >> An endomembrane
system covered with ribosomes where many proteins for
transport are assembled.
signal hypothesis ANS >> Predicts that proteins bound for
the endomembrane system have a molecular address tag
that directs the growing polypeptide to enter the ER.
targeting the RER requires 4 components ANS >> - protein
synthesis exposes the amino acid signal sequence
- the signal recognition particle (SRP) a multiunit complex
binds signal stop sequence protein synthesis
- the SRP binds to the SRP receptor dimer on the ER
membrane
- the complex binds to the transposon. protein synthesis
resumes as the ER transport connects with the
transposon to insert protein
,BSCI 1510 FINAL EXAM
a signal peptide of protein translocated into the ER lumen
is cleaved by signal peptidase ANS >> signal peptide targets
the new protein into the ER
ER protein folding is assisted by molecular chaperones ANS
>> Blip is an Atasi of the ER lumen that binds to the
proteins as it is being translocated and assist in folding
internal stop transfer sequence leaves protein embedded
leaves protein embedded in the ER membrane ANS >> it
stops translocation and leaves an integral protein in the
protein
quality control mechanism for improperly folded protein
ANS >> glycosylation mechanism modifies the polypeptide
to either be destroyed or the correctly folded protein are
released
why are secreted protein glycosylated ANS >> block
protease, targeting, and signalling
, BSCI 1510 FINAL EXAM
What will a shorter fatty acid tail in phospholipids do to a
membrane? ANS >> increase fluidity
Where do acid hydrolases end up in the I-cell disease
state? ANS >> outside the cell
Which major evolutionary appearance first occurred
~500-600 million years ago? ANS >> metazoan body
Which of these was *NOT* an evolutionary event leading
to plant aerobic respiration? ANS >> chloroplasts
independently evolve photosynthesis
The second major evolutionary division of the 'tree of
life' separated which 2 domains, and when? ANS >>
archaebacteria and eukaryote, ~2 billion years ago
What is the smallest scale you can see with an electron
microscope in a cell? ANS >> ~1 nanometre
BSCI 1510 FINAL EXAM QUESTIONS AND ANSWERS GRADED A+
What outcome is favoured by high adrenaline
(epinephrine) and low insulin? ANS >> elevated oxidative
phosphorylation
eukaryotic cells ANS >> Have a true nucleus are larger than
prokaryotic cells and are found in all living things except
bacteria
endocytosis and exocytosis ANS >> types of active
transport
secretory pathway ANS >> Rough ER -> Golgi -> secretory
vesicles -> cell exterior
,BSCI 1510 FINAL EXAM
Smooth Endoplasmic Reticulum ANS >> An endomembrane
system where lipids are synthesized, calcium levels are
regulated, and toxic substances are broken down.
Rough Endoplasmic Reticulum ANS >> An endomembrane
system covered with ribosomes where many proteins for
transport are assembled.
signal hypothesis ANS >> Predicts that proteins bound for
the endomembrane system have a molecular address tag
that directs the growing polypeptide to enter the ER.
targeting the RER requires 4 components ANS >> - protein
synthesis exposes the amino acid signal sequence
- the signal recognition particle (SRP) a multiunit complex
binds signal stop sequence protein synthesis
- the SRP binds to the SRP receptor dimer on the ER
membrane
- the complex binds to the transposon. protein synthesis
resumes as the ER transport connects with the
transposon to insert protein
,BSCI 1510 FINAL EXAM
a signal peptide of protein translocated into the ER lumen
is cleaved by signal peptidase ANS >> signal peptide targets
the new protein into the ER
ER protein folding is assisted by molecular chaperones ANS
>> Blip is an Atasi of the ER lumen that binds to the
proteins as it is being translocated and assist in folding
internal stop transfer sequence leaves protein embedded
leaves protein embedded in the ER membrane ANS >> it
stops translocation and leaves an integral protein in the
protein
quality control mechanism for improperly folded protein
ANS >> glycosylation mechanism modifies the polypeptide
to either be destroyed or the correctly folded protein are
released
why are secreted protein glycosylated ANS >> block
protease, targeting, and signalling
, BSCI 1510 FINAL EXAM
What will a shorter fatty acid tail in phospholipids do to a
membrane? ANS >> increase fluidity
Where do acid hydrolases end up in the I-cell disease
state? ANS >> outside the cell
Which major evolutionary appearance first occurred
~500-600 million years ago? ANS >> metazoan body
Which of these was *NOT* an evolutionary event leading
to plant aerobic respiration? ANS >> chloroplasts
independently evolve photosynthesis
The second major evolutionary division of the 'tree of
life' separated which 2 domains, and when? ANS >>
archaebacteria and eukaryote, ~2 billion years ago
What is the smallest scale you can see with an electron
microscope in a cell? ANS >> ~1 nanometre
