BCH210 Quiz Raffle! Questions With Complete Solutions
32 views 0 purchase
Course
BCH210
Institution
University Of Toronto (U Of T
)
Which ONE of the following amino acids may be linked covalently to an oligosaccharide via an O-glycosidic bond?
A. Glc
B. Tyr
C. Thr
D. Asp correct answer: C - Thr has an OH side chain
Which ONE of the following statements is CORRECT regarding the role of thermodynamics in glycolysis?
A. I...
BCH210 Quiz Raffle! Questions With
Complete Solutions
Which ONE of the following amino acids may be linked
covalently to an oligosaccharide via an O-glycosidic bond?
A. Glc
B. Tyr
C. Thr
D. Asp correct answer: C - Thr has an OH side chain
Which ONE of the following statements is CORRECT regarding
the role of thermodynamics in glycolysis?
A. It is spontaneous in the forward direction due to the cleavage
of glucose into 2 molecules.
B. ATP is required as the pathways is unfavourable under
standard conditions.
C. Thermodynamically favourable reactions are the regulated
steps in the pathway.
D. Free energy is only released under cellular conditions. correct
answer: C
A - it is spontaneous but NOT due to cleavage of glucose
B - ATP is required but the pathway IS favorable under std
conditions
D - free E is also released under std conditions
Which ONE of the following statements is CORRECT regarding
the following molecule?
,A. It is a reducing sugar in H2O.
B. It contains 2 furanose rings.
C. It is a homodisaccharide.
D. It obeys the molecular formula (CH2O)n correct answer: A -
hydroxyl on anomeric C of mono on the right can open up to a
linear chain + be oxidized to reduce CU2+
B - it contains ONE furanose ring
C - HETEROdisaccharide
D - nope, its no longer a simple MONOsaccharide
Which ONE of the following statements is CORRECT regarding
disaccharides?
A. They can be homodimers or heterodimers.
B. They are always connected by their anomeric carbons.
C. Water is required for glycosidic bond formation.
D. They obey the formula (C*H2O)n correct answer: A -
homodimer ex: maltose (2 glucoses), heterodimer ex: lactose
(glucose + galactose)
B - nope, 1,4 linear and 1,6 branching bonds exist
C - water is RELEASED when glycosidic bond forms
(condensation rxn)
D - nope, not simple monosaccharides
Which ONE of the following statements is CORRECT regarding
the breakdown of dietary carbohydrates in humans?
, A. When glycogen is broken down, glucose is removed from the
reducing ends.
B. Only homopolymers can be used for energy.
C. Hydrolases are enzymes that cleave O-glycosidic bonds.
D. Cellulose can be used as a source of free glucose correct
answer: C - uses H2O to cleave bonds
A - NON-reducing end
B - nope, heteropolymers like lactose/sucrose can also be used
in glycolysis (after being broken down to monos)
D- not in humans, because we dont have enzymes specific for b-
1,4 glycosidic bonds
Which ONE of the following enzymes is stimulated by
phosphorylation following epinephrine signalling?
A. Pyruvate kinase
B. Phosphoglucomutase
C. Phosphofructokinase 1
D. Glycogen phosphorylase correct answer: D - by PKA, starts
glycogen phosphorolysis by removing glucose from non-
reducing ends + transferring a P onto glucose to form G1P
A - INactivated
B + C - not phosphorylated by epinephrine signalling
Which ONE of the following is CORRECT regarding a pair of
epimers?
A. Mutarotation allows for their interconversion.
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller Classroom. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $12.99. You're not tied to anything after your purchase.
