Uoft 2023 Fall BCH210 Final exam Questions With Complete Solutions
236 keer bekeken 2 keer verkocht
Vak
BCH210
Instelling
University Of Toronto (U Of T
)
Monosaccharide formula correct answer: (CH2O)n (n is 3 or more)
Aldotriose correct answer: Also known as glyceraldehyde, simplest aldehyde monosaccharide (n = 3), has L and D isomer (centre carbon is chiral)
Ketotriose correct answer: Also known as dihydroxyacetone, simplest ketone monosac...
uoft 2023 fall bch210 final exam questions with co
Geschreven voor
University of Toronto (U of T
)
BCH210
BCH210
Alle documenten voor dit vak (25)
Verkoper
Volgen
Classroom
Ontvangen beoordelingen
Voorbeeld van de inhoud
Uoft 2023 Fall BCH210 Final exam Questions
With Complete Solutions
Monosaccharide formula correct answer: (CH2O)n (n is 3 or
more)
Aldotriose correct answer: Also known as glyceraldehyde,
simplest aldehyde monosaccharide (n = 3), has L and D isomer
(centre carbon is chiral)
Ketotriose correct answer: Also known as dihydroxyacetone,
simplest ketone monosaccharide (n = 3), non chiral
Carbon numbering correct answer: Aldoses always have
aldehyde and C1, ketoses have ketone at C2
Sugar naming correct answer: triose, tetrose, pentose, hexose,
etc., l or d based on whether hydroxyl is right of chain (d) or left
(l), last chiral carbon (furthest from carbonyl) denoted with L or
D
L isomer of a sugar correct answer: Last chiral carbon's
hydroxyl is on the left
D isomer of a sugar correct answer: Last chiral carbon's
hydroxyl is on the right, found in body
Number of stereoisomers in a linear monosaccharide correct
answer: 2^(Number of chiral carbons), e.g. for an aldopentose,
,3 chiral carbons so 8 isomers, for a ketopentose, 2 chiral carbons
so 4 isomers. If including cyclic structures, there are 2 more or 4
more if it can form both 5 and 6 ring structures
cyclic structures of monosaccharides correct answer: Prevalent
form monosaccharides with 5 or 6 carbon atoms, form when the
hydroxyl group on the last chiral carbon reacts with the aldehyde
group or ketone group.
Furan ring correct answer: 5 member ring with O formed by
cyclization of a monosaccharide (cyclization of ketose usually).
Can occur with tetroses (4 Cs + O from carbonyl)
Pyran ring correct answer: 6 member ring with O formed by
cyclization of monosaccharide (cyclization of aldose usually)
Nucleophilic attack to cyclize sugars correct answer: Only
occurs in water, electrons of hydroxyl group attack carbonyl,
forming cyclic structure with the old hydroxide becoming an O
in the ring and a new hydroxide formed (using the old
hydroxide's H) either above/equatorial (beta) or below/axial
(alpha) the plane of the structure - beta is more stable
Anomeric Carbon correct answer: the new chiral center formed
in ring closure; it was the carbon containing the carbonyl in the
straight-chain form
Anomers correct answer: Isomers that differ at a new
asymmetric carbon atom formed on ring closure (e.g. alpha and
beta)
, Mutarotation correct answer: The rapid interconversion
between different anomers of a sugar that allows the substanace
to rotate polarized light
Isomers correct answer: Two different molecules that have the
same chemical formula
Constitutional isomers correct answer: same molecular formula,
different connectivity
Stereoisomers correct answer: Compounds with the same
structural formula but with a different arrangement of the atoms
in space.
Enantiomers correct answer: isomers that are mirror images of
each other
Diastereoisomers correct answer: Stereoisomers that are not
mirror images of each other. Includes epimers (only differ at one
assymetric carbon) and anomers (differ at a newly formed,
asymmetric C in the ring structure)
Reducing Sugars correct answer: Saccharides (sugars) that
donate electrons resulting in the reduction (gain of electrons) of
another molecule. Require a free OH next to O in the cyclic
form to convert back to the linear form and have a carbonyl to
react. Sugar acts as a reducing agent and is oxidized in reaction
Linearization of sugars correct answer: Bond is broken between
O and the carbon containing a hydroxyl. The O becomes a
Voordelen van het kopen van samenvattingen bij Stuvia op een rij:
Verzekerd van kwaliteit door reviews
Stuvia-klanten hebben meer dan 700.000 samenvattingen beoordeeld. Zo weet je zeker dat je de beste documenten koopt!
Snel en makkelijk kopen
Je betaalt supersnel en eenmalig met iDeal, creditcard of Stuvia-tegoed voor de samenvatting. Zonder lidmaatschap.
Focus op de essentie
Samenvattingen worden geschreven voor en door anderen. Daarom zijn de samenvattingen altijd betrouwbaar en actueel. Zo kom je snel tot de kern!
Veelgestelde vragen
Wat krijg ik als ik dit document koop?
Je krijgt een PDF, die direct beschikbaar is na je aankoop. Het gekochte document is altijd, overal en oneindig toegankelijk via je profiel.
Tevredenheidsgarantie: hoe werkt dat?
Onze tevredenheidsgarantie zorgt ervoor dat je altijd een studiedocument vindt dat goed bij je past. Je vult een formulier in en onze klantenservice regelt de rest.
Van wie koop ik deze samenvatting?
Stuvia is een marktplaats, je koop dit document dus niet van ons, maar van verkoper Classroom. Stuvia faciliteert de betaling aan de verkoper.
Zit ik meteen vast aan een abonnement?
Nee, je koopt alleen deze samenvatting voor €15,62. Je zit daarna nergens aan vast.
