BioChemistry Quiz

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Question 1 of 121

L’acide phosphorique est tri-basique, avec des valeurs de pKa de 2.14, 6.88 et 12.4. Quelle forme ionique est prédominante à pH = 5.9 ?

Select one of the following:

H3PO4
H2PO4-
HPO42-
PO43-

Explanation

Question 2 of 121

What is the basic formula of Carbohydrates?

Select one of the following:

Cn(OH)n
Cn(CO2)n
Cn(H2O)n
C(H2O)n

Explanation

Question 3 of 121

Which of these is not these is not a polysaccharide?

Select one of the following:

Cellulose
Glycogen
Starch
Fructose

Explanation

Question 4 of 121

Long chains of single sugars covalently linked describes what types of carbohydrates?

Select one of the following:

Oligosaccharides
Multisaccharides
Polysaccharides
Megasaccharides

Explanation

Question 5 of 121

Which pair of molecules are epimers?

Select one of the following:

D-Glucose and D-Galactose
D-Glucose and L-Glucose
Threose and Erythrose
D-Glucose and D-Gulose

Explanation

Question 6 of 121

Which of these structures is glucose?

Select one of the following:

Explanation

Question 7 of 121

Galactose is a ___ epimer of glucose.

Select one of the following:

Explanation

Question 8 of 121

Which one of these is a ketohexose

Select one of the following:

Fructose
Glucose
Ribose
2-Deoxy-Ribose

Explanation

Question 9 of 121

Which of these is not true?

Select one of the following:

Enantiomers are stereoisomers that are not mirror images
In sugars that contain the most chiral centers only the one that is the most distant from the caronyl carbon is designated as D or L
hemiacetals are formed by alcohols attacking aldehydes
Alcohol oxygen atom is nucleophilic

Explanation

Question 10 of 121

During the cyclisation of Monosaccharides which is/are true?

Select one of the following:

The carbon atom furthest from the former carbonyl atom becomes the anomeric carbon
The position of anomeric carbon's oxygen determines whether the anomer is α or β
The position of the anomeric carbon's hydroxyl group determines whether the anomer is α or β
The carbon atom furthest from the former carbonyl atom becomes the chiral center

Explanation

Question 11 of 121

Which of these are carbohydrates that have a chemical structure that includes a six-membered ring consisting of five carbon atoms and one oxygen atom?

Select one of the following:

Furanoses
Pyranoses

Explanation

Question 12 of 121

The disaccharide formed upon condesation of two glucose molecules via the 1-4 bond is called

Select one of the following:

Trehalose
Sucrose
Maltose
Lactose

Explanation

Question 13 of 121

Which of these describes cellobiose

Select one of the following:

α-D-glucopyranosyl-(1→2)-β-D-fructofuranoside
β-D-glucopyranosyl-(1→4)-β-D-glucopyranose
β-D-galactopyranosyl-(1→4)-α-D-glucopyranose
α-D-glucopyranosyl-(1→4)-β-D-glucopyranose

Explanation

Question 14 of 121

Polysaccharides...

Select one of the following:

can be branched but cannot have multiple monomer types
cannot be unbrached
have defined molecular weights
with only two monomer types cannot be branched

Explanation

Question 15 of 121

Which one of these hetero-polysaccharides has the largest size

Select one of the following:

peptidoglycan
agarose
hyaluronan

Explanation

Question 16 of 121

which of these is used in Algae cell walls

Select one of the following:

Peptidoglycan
hyaluronan
agarose

Explanation

Question 17 of 121

Glucose is stored in animals as

Select one of the following:

Glucagon
Glycogen
Glucose
Insulin
Starch

Explanation

Question 18 of 121

Glycogen is a polysaccharide in which glucose is joined by β-(1→4) linkages

Select one of the following:

True
False

Explanation

Question 19 of 121

Glycogen is a polysaccharide in which glucose is joined by α-(1→6) linkages

Select one of the following:

True
False

Explanation

Question 20 of 121

Which of the following is true

Select one of the following:

Amylose is the branched form of starch
α-amylase is a pancreatic enzyme that hydrolyses the α (1→4) linkages of starch
Glycogen has less α (1→4) linkages than starch
Glycogen has less α (1→6) linkages than starch

Explanation

Question 21 of 121

hydrolysis of cotton occurs

Select one of the following:

at the β (1→2) linkages of D-glucose
at the α (1→2) linkages of D-glucose
at the β (1→4) linkages of D-glucose
at the α (1→4) linkages of D-glucose

Explanation

Question 22 of 121

Which of the following is not true

Select one of the following:

Glycosidic bonds can freely rotate
more than 10^9 metric tonnes of cotton are produced/year
Starch can be coiled into a helical structure
Glycogen and amylopectin have only one reducing end

Explanation

Question 23 of 121

Which of these lack enzymes that can hydrolyse D-glucose β (1→4) linkages

Select one of the following:

Fungi
bacteria
termites
protozoa

Explanation

Question 24 of 121

Chitin

Select one of the following:

is a heteropolymer
consists of β (1→2) linkages of N-acetyl-D-glucosamine
is insoluble
once acetlated forms Chitosan

Explanation

Question 25 of 121

Sephadex gels separate proteins by

Select one of the following:

size
charge
polarity
shape

Explanation

Question 26 of 121

Which of these would you find in the first fractions after size exclusion chromatography

Select one of the following:

acidic proteins
the smallest proteins
the largest proteins
basic proteins

Explanation

Question 27 of 121

which of these are homoglycans

Select one of the following:

Agar
Dextrans
Peptidoglycan
None

Explanation

Question 28 of 121

Which of these can be linked to epichlorohydrin in sephadex beaded gels

Select one of the following:

Agar
Agarose
Peptidoglycan
Dextran

Explanation

Question 29 of 121

Agar is a complex mixture of heteropolysaccharides containing modified

Select one of the following:

Glucose units
Mannose units
Fructose units
None of the above

Explanation

Question 30 of 121

Which of these is false

Select one of the following:

Agarose can be used for growing bacteria
Agarose is a component of bacterial cell walls
Agarose can be used for DNA separation
Agar is a component of seaweed cell walls

Explanation

Question 31 of 121

N-acetyl-galactosamine is a ___ epimer of N-acetyl-glucosamine

Select one of the following:

Explanation

Question 32 of 121

Where wold yo expect to find hyaluronate

Select one of the following:

ECM of Cartilage
Hair
Nails
Horns

Explanation

Question 33 of 121

Which one of these glycosaminoglycans acts as a lubricant?

Select one of the following:

Chondrotin-4-sulfate
keratan sulfate
heparin
hyaluronate

Explanation

Question 34 of 121

which one of the has approximately 50'000 disaccharides per chain

Select one of the following:

hyaluronate
keratan sulfate
heparin
chondrotin-4-sulfate

Explanation

Question 35 of 121

Which one of these glycosaminoglycans consists of [galactose β(1,4) Glc-NAc6S] repeating disaccharides

Select one of the following:

hyaluronate
chondrotin-4-sulfate
heparin
keratan sulfate

Explanation

Question 36 of 121

Which of these repeating disaccharides make dermantan sulfate?

Select one of the following:

glucaronic acid and N-acetylglucosamine
glucaronic acid and N-acetylgalctosamine-4-sulfate
Iduronic acid and N-acetylgalactosamine-4-sulfate
Iduronic acid and N-acetylglucosamine

Explanation

Question 37 of 121

The cabohydrate attached to a protein in a Glycoconjugate attaches via...

Select one of the following:

The C6 carbon
The anomeric carbon
The furthest carbon from the anomeric carbon
The C2 carbon

Explanation

Question 38 of 121

Which of the following most likely contains the most glycosylated proteins (Glycoproteins)

Select one of the following:

Humans
E.coli
Ebola virus
Cats

Explanation

Question 39 of 121

O linked oligosaccharides are linked through the N terminus of the amino acid

Select one of the following:

True
False

Explanation

Question 40 of 121

In glycoproteins, sugars are attached either to the amide nitrogen atom in the side chain of asparagine (termed an N-linkage) or to the oxygen atom in the side chain of serine or threonine (termed an O-linkage)

Select one of the following:

True
False

Explanation

Question 41 of 121

Glycophorin A is the most important attachment site for which of the following parasites in order to enter erythrocytes

Select one of the following:

Plasmodium falciparum
Chilomastix mesnili
Entamoeba coli
Entamoeba dispar

Explanation

Question 42 of 121

Which of these sulfated glycosaminoglycans are attached to a protein anchored to a membrane lipid?

Select one of the following:

syndecans
glypicans

Explanation

Question 43 of 121

NB! Select all which are functions of polysaccharides

Select one or more of the following:

Labelling of proteins for destruction
Recognition sites for growth factors
recognition sites for bacteria
localization of certain proteins

Explanation

Question 44 of 121

Which one of these is not a main component of the extracellular matrix (ECM)

Select one of the following:

Proteoglycan aggregates
Collagen fibers
Elastin
Fatty acids

Explanation

Question 45 of 121

Which one of these in not a characteristic of Glycosaminoglycans

Select one of the following:

Negatively charged
C5 oxidation
one monomer is either N-acetyl-glucosamine or N-acetyl-galactosmine
found in connective tissue

Explanation

Question 46 of 121

Plasmodium flaciparum requires which of these as an attachment site to enter erythrocytes

Select one of the following:

Glycophorin A
Hyaluronan
syndecan
Podocalyxin

Explanation

Question 47 of 121

Which of these about proteoglycans is not true

Select one of the following:

Proteoglycan aggregates are found in articula cartilage
Proteoglycans influence growth factor activation and adhesion
glycosaminoglycans are linked to the core protein from the anomeric carbon
proteoglycanaggregates form high friction material

Explanation

Question 48 of 121

Which of these are integral receptors for extracellular proteoglycans

Select one of the following:

Integrins
actin
collagen fibers
elastin

Explanation

Question 49 of 121

Which of these about enzymatic reactions is true

Select one of the following:

Enzymes directly affect equilibrium (∆G)
Entropy cost is paid during binding
enzymes increse reaction rates (κ ) by increasing (∆G)
slow reactions do not have high activtaion barriers

Explanation

Question 50 of 121

Rate of enzymatic reactions are affected by....? (Click all true)

Select one or more of the following:

concentration of enzyme
concentration of substrate
temperature
shape of enzyme
shape of substrate

Explanation

Question 51 of 121

Which one of these describes a micelle

Select one of the following:

individual units are wedge shaped
artificial carriers of molecules
individual units are cylindrical
composed lipid-based structures that form pliable sheets

Explanation

Question 52 of 121

Which of these is false

Select one of the following:

membranes vary from 3-10nm
membranes form spontaneously by noncovalent forces
membranes are symmetric
membranes can be found within cells

Explanation

Question 53 of 121

Which of these is true about fatty acids

Select one of the following:

Most natural fatty acids are branched
Saturated fatty acids have double bonds between carbons in the chain
Most natural fatty acids have an even number of C's
linoleic acid is a saturated fatty acid

Explanation

Question 54 of 121

Which of these is false about fatty acids

Select one of the following:

Fatty acids solubility decreases as the chain length increases
Melting point decrases as the chain length decreses
Melting point increases as the number of double bonds increases
unsaturated cis fatty acids have a lower melting point than saturated fatty acids

Explanation

Question 55 of 121

Omega-3 (ω-3) fatty acids have

Select one of the following:

a double bond between the 2nd and 3th carbon from the methyl end of the chain.
a double bond between the 3rd and 4th carbon from the methyl end of the chain.
a double bond between the 1st and 2nd carbon from the methyl end of the chain.
a double bond between the 2nd and 3nd as well as 3rd and 4th carbon from the methyl end of the chain.

Explanation

Question 56 of 121

Which of these is untrue

Select one of the following:

Triacylglycerols are polar
Triacylglycerols are non hydrated
Vegetable oils are composed of triacylglycerols with unsaturated fatty acids
Animal fats are composed of triacylglycerols with saturated fatty acids

Explanation

Question 57 of 121

which of these is a greasy solid at room tempreature

Select one of the following:

triacylglycerols with unsaturated fatty acids
triacylglycerols with saturated fatty acids

Explanation

Question 58 of 121

which of these is a sphingolipid

Select one of the following:

Explanation

Question 59 of 121

Which of these is the head group of phosphatidylserine

Select one of the following:

Explanation

Question 60 of 121

Which of these has a net charge of -4 at pH7

Select one of the following:

phosphatidylcholine
cardilipin
phosphatidylglycerol
phosphatidylinositol 4,5- biphosphate

Explanation

Question 61 of 121

Which of these is the major component of most eukaryotic cell membranes

Select one of the following:

phophatidylcholine
phosphatidylglycerol
cardiolipin
phosphatidylethanolamine

Explanation

Question 62 of 121

a fatty acid is joined to sphingosine via an

Select one of the following:

ester linkage
amide linkage
glycosidic linkage
phosphodiester linkage

Explanation

Question 63 of 121

ganglioside GM2 has which of these as a head group

Select one of the following:

glucose
galactose
di, tri, or tetrasaccharide
complex oligosaccharide

Explanation

Question 64 of 121

The blood groups are determined in part by the

Select one of the following:

type of sugars located on the head groups in glycosphingolipids
type of sugars located on the head groups in glycolipids
type of sphingolipids
type of galactolipids

Explanation

Question 65 of 121

The structure of sugars located on the head groups in glycosphingolipids is determined by an expression of specific glycosyltransferases. Individuals with a glycosyltransferase that transfers an N-acetylgalactosamine group will

Select one of the following:

will have the O antigen
A blood group
B blood group
AB blood group

Explanation

Question 66 of 121

which of thes is false

Select one of the following:

Cholesterol modulates cell membrane fluidity
Mammals can not synthesize cholesterol
cholesterol in loe density lipoproteins tend to deposit in arteries
most bacteria lack sterols

Explanation

Question 67 of 121

which of these polyketides is an antibiotic

Select one of the following:

erythromycin
amphotericin B
lovastatin

Explanation

Question 68 of 121

which of these lipids are hormone precursors

Select one of the following:

vitamins E and K
vitamins A and D
steroid hormones
eicosanoids

Explanation

Question 69 of 121

which of these lipids are paracrine hormones

Select one of the following:

phosphatidylinositols
vitamins A and D
vitamins E and K
Dienes
eicosanoids

Explanation

Question 70 of 121

which of these is true

Select one of the following:

cholesterol is predominant in mitochondrial membranes
galactolipids are abundant in animals
membranes have non-selective import and export across the membrane
archaebacteria have monolayer instead of a bilayer

Explanation

Question 71 of 121

which of these is a type 6 integral membrane protein

Select one of the following:

Explanation

Question 72 of 121

Which of these amino acid residues would you find predominantly in the transmembrane segments of membrane proteins

Select one of the following:

Explanation

Question 73 of 121

Proteins can be targeted to the INNER leaflet of the plasma
membrane by farnesylation. The primary sequence of the protein contains a signature for farnesylation which is

Select one of the following:

CaaX
MaaX
CaX
MaX

Explanation

Question 74 of 121

hutchinson-gilford progeria syndrome is caused by

Select one of the following:

palmitoylation defect
myristoylation defect
farnesylation defect

Explanation

Question 75 of 121

which of these are only found on the outside of cell membranes

Select one of the following:

proteins
lipids
carbohydrates

Explanation

Question 76 of 121

which of these statements about the physical properties of membranes is true

Select one of the following:

Permeable to large polar solutes and ions
Not permeable to small polar solutes and nonpolar
compounds
Permeability can be artificially increased by chemical
treatment
Exist in a single phase and cannot undergo phase
transitions

Explanation

Question 77 of 121

Heating causes

Select one of the following:

cell membrane transition from the gel to fluid
cell membrane transition from the fluid to gel
cell membrane changed to become not permeable to large polar solutes
cell membrane changed to become permeable to small polar solutes and nonpolar compounds

Explanation

Question 78 of 121

Which of these statements on membrane fluidity is incorrect

Select one of the following:

is determined mainly by the fatty acid composition
more fluid membranes require shorter and more unsaturated fatty acids
At higher temperatures cells need more saturated fatty
acids to maintain fluidity
Gel phase means that the individual molecules do not move
around

Explanation

Question 79 of 121

which of these increase in membrane compisition percentage when temperatures increase

Select one of the following:

Myristic acid
palmitoleic acid
oleic acid
hydroxymyristic acid

Explanation

Question 80 of 121

Cell membranes of .... contain hopanols instead of sterols

Select one of the following:

animals
bacteria
plants
fungi

Explanation

Question 81 of 121

Membrane Dynamics: Transverse Diffusion.

Spontaneous flips of individual lipids from one leaflet to another are rare because...

Select one of the following:

the hydrophobic head group must transverse the hydrophilic tail region of the membrane
membrans are rigid and individual lipids cannot move at all
the charged head group must transverse the hydrophobic tail region of the membrane

Explanation

Question 82 of 121

Which is false about flippases

Select one of the following:

catalyze transverse diffusion
catalyze lateral diffusion
use ATP
move lipids against the concentratiion gradient

Explanation

Question 83 of 121

Tick ALL that are true!!

Select one or more of the following:

Membrane Lipid Rafts contain clusters of glycosphingolipids with longer-than-usual tails
Membrane Lipid Rafts are more ordered than the rest of the membrane
Membrane fusion can only occur through protein mediation
Passive diffuision of polar molecules across cell membranes has a high activation barrier

Explanation

Question 84 of 121

Which of these is a membrane receptor that detects light

Select one of the following:

opsin
insulin receptor
acetylcholine receptor
maltoporin

Explanation

Question 85 of 121

Which of these is a membrane receptor that detects neurotransmitters

Select one of the following:

opsin
acetylcholine receptor
maltoporin
insulin receptor

Explanation

Question 86 of 121

Cystic fibrosis (Mucoviscidose) is caused by

Select one of the following:

a mutation to a Cl- ion channel in epithelial cells
a mutation to a K+ ion channel in epithelial cells
a mutation to a Na+ ion channel in epithelial cells
a mutation to a Ca2+ ion channel in epithelial cells

Explanation

Question 87 of 121

Tick ALL that are correct

Select one or more of the following:

Energy of ATP hydrolysis can be used to drive protons through the membrane
Energy of the proton gradient can be used to synthesize ATP
Primary active transport is a form of active transport across a biological membrane in which a transporter protein couples the movement of an ion (typically Na+ or H+) down its electrochemical gradient to the uphill movement of another molecule or ion against a concentration/electrochemical gradient.
glucose is cotransported with Na+ in intestinal epithelial cells

Explanation

Question 88 of 121

Which of these plasma proteins is the most abundant

Select one of the following:

transferrin
ceruloplasmin
immunoglobulins
albumin

Explanation

Question 89 of 121

What is labelled as B?

Select one of the following:

blood
plasma
White blood cells
ficoli

Explanation

Question 90 of 121

What is labelled as D

Select one of the following:

Plasma
White blood cells
Ficoli
white blood cells

Explanation

Question 91 of 121

Which of these are not a hematopoietic cells

Select one of the following:

eosinophils
basophils
neutrophils
thrombocytes

Explanation

Question 92 of 121

Which of these is derived from lymphoid stem cells

Select one of the following:

erythrocytes
T cells
basophil
neutrophil

Explanation

Question 93 of 121

Which one of these leukocytes secretes histamine and mediates inflammation

Select one of the following:

neutrophils
basophils
eosinophils
macrophages

Explanation

Question 94 of 121

Which of these leukocytes produces Ab (antibodies)

Select one of the following:

Neutrophils
T cells
B cells
Macrophages

Explanation

Question 95 of 121

Where is myoglobin found

Select one of the following:

in the bone marrow
freely circulating in the blood
in skeletal and striated muscles
restricted to erythrocytes

Explanation

Question 96 of 121

which of these is false

Select one of the following:

myogloblin stores oxygen in the cytoplasm and delivers it to mitochondrion
hemoglobin is restricted to erythrocytes
Heme (B) is the oxygen binding molecule found only in hemoglobin
the distal histidine of the myglobin protein hydrogen bonds with oxygen bound to the protein

Explanation

Question 97 of 121

Consider a process in which a ligand (L) bind reversibly to a site in a protein (P). After some time, the process will reach equilibrium where the Ka (association rate constant) and Kd (dissociation rate constant) rates are equal. which of these equations represents the equilibrium.

Select one of the following:

kd [P].[L] = ka [PL]
ka [P].[L] = kd [PL]
[P].[L] = [PL]
ka [P].[L] > kd [PL]

Explanation

Question 98 of 121

Which of these statements is false

Select one of the following:

when the first binding event increases affinity at the remaining sites it is called positive cooperativity
when the first binding event decreases affinity at the remaining sites it is called negative cooperativity
oxygen binds to heme better than carbon monoxide
nH( hill coefficient) > 1 equals positive cooperativity

Explanation

Question 99 of 121

Cooperativity can be described as

Select one of the following:

positive homotropic regulation
negative homotropic regulation
positive heterotropic regulation
negative heterotropic regulation

Explanation

Question 100 of 121

Which of these statement on hemoglobin is false

Select one of the following:

oxygen binding triggers a tense to relaxed state conformational change
tense state has a higher affinity for oxgen than the relaxed state
conformational change from the T state to the R state invloves breaking ion pairs between the alpha1-beta2 interface of hemoglobin
2,3 -Bisphosphoglycerate is a negative heterotropic regulator of hemoglobin function

Explanation

Question 101 of 121

which of these is a non-phosphorylated nitrogenous base

Select one of the following:

nucleoside
nucleotide
nucleobase
nucleomide

Explanation

Question 102 of 121

Which side are the purines

Select one of the following:

Explanation

Question 103 of 121

Which color is encircling where a glycosidic bond between the nitrogenous base and the sugar would be present

Select one of the following:

red
green
blue
none of the above

Explanation

Question 104 of 121

Which letter represents deoxyadenylate

Select one of the following:

Explanation

Question 105 of 121

Which letter represents deoxythymidylate

Select one of the following:

Explanation

Question 106 of 121

Which letter represents deoxyguanylate

Select one of the following:

Explanation

Question 107 of 121

Which letter is representing cytidylate (CMP)

Select one of the following:

Explanation

Question 108 of 121

Which of these statements about the purine and pyrimidine bases is true

Select one of the following:

Cytosine is found in both DNA and RNA
Neutral molecules at pH 7
Guanine pKa at N7 is 2.4
all the above

Explanation

Question 109 of 121

In nucleotides the pentose ring is attached to the nucleobase via a

Select one of the following:

β -N-Glycosidic Bond
α -N-Glycosidic Bond
Hydrogen bond
none of the above

Explanation

Question 110 of 121

In DNA structure there is free rotation about

Select one of the following:

C-1’-N-glycosyl bond
C-2’-N-glycosyl bond
C-3’-N-glycosyl bond
C-4’-N-glycosyl bond

Explanation

Question 111 of 121

How many base pairs do you find in the A form of DNA

Select one of the following:

10.5
11
12
13

Explanation

Question 112 of 121

The aromaticity of the nucleotide bases and their dipole moments is important for which interactions in DNA

Select one of the following:

Van der Waal forces in base stacking
link between base and sugar in a nucleotide
the link between two different nucleotides
interstrand bonding and complementarity

Explanation

Question 113 of 121

Figure A represents which type of DNA secondary structure

Select one of the following:

hairpin
mirror image
palindrome
cruciform

Explanation

Question 114 of 121

Figure C represents which type of DNA secondary structure

Select one of the following:

Cruciform
Palindrome
Hairpin
Mirror image

Explanation

Question 115 of 121

DNA sequences with a very high proportion of G residues forms which unusual DNA structure found on chromosome telomeres

Select one of the following:

tetraplex DNA
triplex DNA
inverted repeats
cruciforms

Explanation

Question 116 of 121

Which of these are a quaternary DNA structure

Select one of the following:

Chromatin
hairpin
supercoil
Triplex

Explanation

Question 117 of 121

In mammals ____ Functions as an autocoid, or "local hormone"

Select one of the following:

Adenosine
Guanine
Cytosine
Thymine

Explanation

Question 118 of 121

Which one of these is an RNase enzyme that prevents inbreeding of plants

Select one of the following:

S-RNase
RNase-P
Dicer
None of the above

Explanation

Question 119 of 121

_____ is an enzyme that cleaves double-stranded RNA into oligonucleotides

Select one of the following:

S-RNase
Dicer
RNase P

Explanation

Question 120 of 121

Why would animal cells need an enzyme that cleaves double-stranded RNA into oligonucleotides

Select one of the following:

processessing tRNA precursors
protection from viral genomes
using RNA as an energy source
using RNA in Coenzymes

Explanation

Question 121 of 121

RNA would be unstable in which of the conditions listed below

Select one of the following:

pH 1
pH 3
pH 6
pH 10

Explanation

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	Created by Roy Hove almost 8 years ago

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BioChemistry Quiz

Question 1 of 121

L’acide phosphorique est tri-basique, avec des valeurs de pKa de 2.14, 6.88 et 12.4. Quelle forme ionique est prédominante à pH = 5.9 ?

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Question 2 of 121

What is the basic formula of Carbohydrates?

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Question 3 of 121

Which of these is not these is not a polysaccharide?

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Question 4 of 121

Long chains of single sugars covalently linked describes what types of carbohydrates?

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Question 5 of 121

Which pair of molecules are epimers?

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Question 6 of 121

Which of these structures is glucose?

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Question 7 of 121

Galactose is a ___ epimer of glucose.

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Question 8 of 121

Which one of these is a ketohexose

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Question 9 of 121

Which of these is not true?

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Question 10 of 121

During the cyclisation of Monosaccharides which is/are true?

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Question 11 of 121

Which of these are carbohydrates that have a chemical structure that includes a six-membered ring consisting of five carbon atoms and one oxygen atom?

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Question 12 of 121

The disaccharide formed upon condesation of two glucose molecules via the 1-4 bond is called

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Question 13 of 121

Which of these describes cellobiose

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Question 14 of 121

Polysaccharides...

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Question 15 of 121

Which one of these hetero-polysaccharides has the largest size

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Question 16 of 121

which of these is used in Algae cell walls

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Question 17 of 121

Glucose is stored in animals as

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Question 18 of 121

Glycogen is a polysaccharide in which glucose is joined by β-(1→4) linkages

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Question 19 of 121

Glycogen is a polysaccharide in which glucose is joined by α-(1→6) linkages

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Question 20 of 121

Which of the following is true