Worksheetsالقصر العينى الاختبار الاول
Total questions: 47
Worksheet time: 55mins
Monosaccharide derivatives include all of the
following EXCEPT:
sorbitol
deoxyribose.
Glucuronic acid.
mannose.
Which of the following is homopolysaccharides present in animals?
Cellulose.
Dextrin.
Starch.
Glycogen.
0ptical activity is due to the presence of :
Asymmetric carbon atom .
Symmetric carbon atom .
All of the above .
None.
........................ is non reducing sugar :
Glucose.
Mannose.
Lactose.
Sucrose.
The most important epimers of galactose is :
ribose.
glucose.
fructose.
xylose
Starch is
Invert sugar
homopolysaccharide
eteropolysaccharide
disaccharide
.......................... is heteropolysaccharides ?
cellulose
starch.
Hyaluronic acid.
dextrin
Which of the following glycosaminoglycans acts as
anticoagulant ?
Heparin.
chondroitin sulfate
hyaluronic acid
dermatan sulfate
Which of the following is levorotatory
glucose
mannose
fructose
galactose
Keratan sulphate is found in...................
Heart muscle
Liver
Adrenal cortex
Cornea
All of the following have 18 carbon atoms except
Linoleic acid
Palmitic acid
Linolenic acid
Stearic acid
Sphingosine is not present in
Cerebrosides
Gangliosides
Sphigomyelin
Plasmalogen
Which nitrogenous base out of the followings is present in lecithin ?
Choline
Adenine
Ethanolamine
Any of the above
-Which out of the followings is omega 3 fatty acid?
Linolenic acid
Linoleic acid
Palmitic acid
Arachidonic acid
Phospholipid acting as surfactant is :
Phosphatidyl inositol
Cephalin
Lecithin
Phosphatidyl serine
number of double bonds in arachidonic acid is
2
3
4
6
The following is not phospholipid:
Sphingomylin
Lecithin
Cerebrosides
Cephalin
An example of simple lipid is
Glycerol
Fatty acids
Triglycerides
Cephalin
Which of the following is glycolipid
Cerebrosides
Sphingomylin
Plasmalogen
Phosphatidyl ethanolamine
Margarine is rich in : سؤال حلووو
cholesterol
trans-fats
eicosanoids
unsaturated fatty acids
Valine, leucine and isoleucine are:
Non essential amino acids
Branched chain amino acids.
Sulfur containing amino acids.
Basic amino acids
Cystein, Cystine and methionine are:
Essential amino acids
sulfur containing amino acids.
acidic amino acids.
All of the above.
In denaturation all the following changes occur except
Loss of antigenic properties.
Loss of amino acid sequence.
Loss of Quaternary structure.
Loss of function
Isoelectric point of protein is PH at which:
It loses its charge
present as a dipolar ion.
migrates to the cathode.
It migrates to the anode.
Indol group is specific for:
Phenylalanine.
histidine
Tyrosine
Tryptophan
Essential amino acid with OH group is:
Valine
tryptophan
Theronine
phenyalanine
Which of the following is semiessential amino acid
Histidine
Lysine
Alanine
Aspartic acid
Two amino groups are present in :
Leucine
Lysine
Glutamate
Threonine
Amino acids are
building blocks of carbohydrates
building blocks of
nucleic acids
building blocks of lipids
building blocks of proteins
Which of the following is an a imino acid
Serine
valine
Proline
threonine
اكتر مادة بتحبها فى سنة اولى ايه ؟
البايوكمسترى مع دكتور حفناوى
البايوكمسترى عشان بيشرحها دكتور حفناوى
مادة الدكتور حفناوى
البايوكمسترى و الدكتور حفناوى
One of the following is about 25% of total body protein
Collagen
Elastin
Keratin
Heparin
The building unit of collagen include the following except:
Glycine is about 33% of its total amino acids.
building unit is tropocollagen
Three alpha chain each is right-handed
High content of hydroxyproline & hydroxylysine
One of the following is not a cartilage protein
Aggrecan
osteonectin
Type II collagen
chondronectin
Marfan's syndrome is caused by
Mutation in integrins
Mutation in tropocollagen
Mutation in fibrillin
Mutation in tropoelastin
The major non-collagenous protein of the bone is
chondronecti
osteocalcin
GAGs
Osteonectin
Osteocalcin synthesis is induced by
Vitamin K
Retinol
Biotin
Calcitriol
Role of copper in collagen in biosynthesis
Activation of Lysyl hydroxylase
Activation of Lysyl oxidasse
Activation of signal peptidase
Activation of Prolyl hydroxylase
One of the following is used as a marker of bone formation
Osteocalcin
osteonectin
Type II collagen
Type I collagen
Emphysema (COPD) is caused by:
Mutation in tropo
Deficiency of A1AT
Deficiency of fibrillin
Deficiency of lysl oxidase
Removal of the signal peptide occurs during
Stabilizing triple helix
Maturation of collagen fiber
Intracellular processing stage of collagen synthesis
Extracellular processing stage of collagen synthesis
Competitive inhibitor is bind to
Inhibition site
Allosteric site
binding site
Active site
AMP is
Competitive inhibitors
Allosteric inhibitor for PFK1
Allosteric activator for PFK1
Enzymes are
protein in nature
carbohydrate in nature
lipid in nature
All the following statements are true with regard to enzymes except
Enzymes lower activation energy
They accelerate the chemical reaction
They alter equilibrium of the reaction
Most of the enzymes are proteins in nature
Enzymes accelerate reactions by .................... the activation energy needed for the reaction:
raising
lowering
binding
stopping
Allopurinol is used in treatment of
Cancer
Liver disease
MI
Gout
