1-The sugar found in DNA is
a) Xylose
b) Ribose
c) Deoxyribose
d) Ribulose
2- All the following are reducing disaccharides except:
a)Isomaltose.
b)Lactose.
c)Sucrose.
d)Cellobiose.
a)Maltose.
3- The only sulfate free GAG is:
a)Heparin.
b)Hyaluronic acid.
c)Inulin.
d)Dextrin.
e)Dextran.
4- Heparin is anticoagulant as it:
a)Binds factors IX and XI.
b)Activates antithrombin.
c)Binds factors IX and X.
d)a and b.
e)b and c.
5- Dermatan sulfate is:
a)Anticoagulant.
b)Present in cornea.
c)Clears plasma lipids.
d)Contains D-glucuronic acid.
e)Lipotropic.
6- Keratan sulfate:
a)Maintains the structure and shape of the sclera.
b)Does not contain uronic acid.
c)Present in bones.
d)Anticoagulant.
e)Clear lipaemic plasma.
7- Deficiency of essential fatty acids leads to all the following except:
a)Fatty liver.
b)Dermatitis.
c)Sterility.
d)Retarded growth.
e)Microcytic anemia.
8- All are correct as regards oils except:
a)Rich in unsaturated FA.
b)Having higher iodine number.
c)Having lower melting point than fat.
d)Difficult to be rancid.
9- Alcohol present in bee’s wax is:
a)Glycerol.
b)Cholesterol.
c)Sphingosine.
d)Myricyl alcohol.
e)Inositol.
10- Ceramide consists of:
a)Glycerol and FA.
b)Sphingosine and galactose.
c)Sphingosine and FA.
d)Glycerol and galactose.
e)None of the above.
11- Phospholipids are:
a)Emulsifying agents.
b)Hydrotropic.
c)Components of plasma lipoproteins.
d)Amphipathic.
e)All of the above.
12- All the following are glycolipids except:
a)Kerasin.
b)Cerebron.
c)Lecithin.
d)Ganglioside.
e)Globoside.
13- All are sphingolipids except:
a)Ceramide.
b)Sphingomyelin.
c)Sulfatides.
d)Cephalin.
e)Ganglioside.
14- Addition of phosphocholine to ceramide produces:
a)Sphingosine.
b)Lecithin.
c)Sphingomyelin.
d)Ganglioside.
e)Globoside.
15- Isoelectric point of amino acid means:
a)Point of migration.
b)Amino acid carries positive or negative charges.
c)Amino acid carries equal positive and negative charges.
d)No amino acid migration in an electric field.
e)C & d.
16- All the following are elements of 2ry structure of proteins except:
a)β-bend.
b)α-helix.
c)β-pleated sheets.
d)β-helix.
17- 2ry structure of proteins is stabilized by:
a)Ionic bond.
b)Hydrophobic interaction.
c)Hydrogen bonds.
d)Peptide bond.
e)Ester bond.
18- All the following interactions stabilize the tertiary structure of proteins except:
a)Disulfide bond.
b)Hydrogen bond.
c)Peptide bonds.
d)Hydrophobic interactions.
e)Ionic bond.
19-During denaturation of proteins, all of the following are disruptedexcept
a) Primary structure
b) Secondary structure
c) Tertiary structure
d)Quaternary structure
20- Denaturation of proteins leads to all the following except:
a)Exposure of some hidden groups.
b)Increasing viscosity.
c)Increasing solubility.
d)Loss of biological activity.
e)Increase digestibility.
21- An example of a protein containing copper is:
a)Carbonic anhydrase.
b)Insulin.
c)Ceruloplasmin.
d)Ferritin.
e)Caseinogen.
22-Concerning ribonucleic acid:
a)It consists of AMP, GMP, CMP and UMP.
b)It is present in single strand.
c)It is synthesized by transcription.
d)tRNA forms 15% of cellular RNA.
e)All of the above.
23-As regard RNA, all are correct except:
a)It contains ribose.
b)Thymine is present.
c)It contains uracil.
d)It consists of single strand.
e)Present mainly in cytosol.
24-Concerning DNA:
  1. It contains 2-deoxyribose.

  1. Its shape is a double helix.

  1. Present in nucleus and mitochondria.

  1. It contains thymine.

  1. All of the above.

25-Guanine pairs with cytosine through:
a)Two hydrogen bonds.
b)Three hydrogen bonds.
c)Four hydrogen bonds.
d)One hydrogen bond.
26) The enzymes of glycolysis in an eukaryotic cell are located in:
  1. Cytosol.

  1. Plasma membrane.

  1. Intermembrane space.

  1. Mitochondrial matrix.

  1. Inner mitochondrial membrane.

27) Thetissues with the highesttotal glycogen content are
  1. Muscleandkidneys

  1. Kidneys and liver

  1. Liver andmuscle

  1. BrainandLiver

28) Glucagon and epinephrine
  1. inhibits gluconeogenesis and stimulates glycolysis

  1. stimulates gluconeogenesis and glycolysis

  1. stimulates gluconeogenesis and inhibits glycolysis

  1. inhibits gluconeogenesis and glycolysis

29. The form in which most dietary lipids are packaged and exported from intestinal mucosal cell is as:
  1. Free fatty acids

  1. Mixed micelle

  1. Free TAG

  1. 2-Monoacylglycerol

  1. Chylomicron

30. An infant, born at 28 weeks of gestation, rapidly gave evidence of respiratory distress. Lab and x-ray results supported the diagnosis of infant respiratory distress syndrome (RDS). Which of the following statements about this syndrome is true?
  1. It is unrelated to the baby's premature birth.

  1. It is a consequence of too few Type II pneumocytes.

  1. The lecithin/sphingomyelin ratio in the amniotic fluid is likely to be greater than two.

  1. The concentration of lung surfactant in the amniotic fluid would be expected to be lower than that of a full-term baby.

  1. RDS is an easily treated disorder with low mortality

31. A membrane phospholipid that does NOT contain glycerol is:
  1. Lecithin

  1. Sphingomyelin

  1. Cerebroside

  1. Cardiolipin

  1. Ceramide

32. Which one of the following enzymes is cholesterol synthesis key enzyme?
  1. HMG CoAsynthetase

  1. HMG CoAreductase

  1. Mevalonatekinase

  1. HMG CoAlyase

  1. Squalenesynthetase

33. Which of the following statements about plasma lipoproteins is correct?
  1. Chylomicrons are synthesized primarily in adipose tissue and transport TAG to liver

  1. HDL particles are reverse cholesterol transport.

  1. VLDL is the precursor of LDL in the circulation

  1. High level of HDLis safer than LDL

  1. Chylomicrons are end products of fat absorption.

34. The lipoprotein particles that have the highest percentage concentration of cholesterol are :
  1. Chyomicrons

  1. VLDLs

  1. LDLs

  1. HDLs

  1. Serum albumin associated lipids

35. Increased formation of ketone bodies during starvation means:
  1. Ketolysis

  1. Ketogenic amino acids

  1. Ketogenesis

  1. Ketoneogenesis

  1. Increased ketone bodies oxidation

36. Increased formation of ketone bodies occurs in:
  1. Liver cytoplasm

  1. Liver mitochondria

  1. Extrahepatic mitochondria

  1. Extrahepatic cytoplasm

  1. Ribosomes

37. Urea is synthesized in:
  1. Cytoplasm

  1. Mitochondria

  1. Both cytoplasm and mitochondria

  1. Lysosomes

38. All of the following are methods of protein purification except :
  1. Electrophoresis

  1. Chromatography

  1. Oxidative deamination

  1. Dialysis

39. cAMP is:
  1. phospholipids

  1. Secondary hormone messenger

  1. Amino acid

  1. Nucleoside

40. SAM is:
  1. Nucleotide

  1. Used in methylation reactions

  1. Active phosphate

  1. None of the above

41. Urea is method for:
  1. Nitrogen removal

  1. Ammonia removal

  1. CO2 removal

  1. All of the above

42. All the following are plasma lipoproteins except:

a-LDH

b-HDL

c-Chylomicrons

d-LDL

43. One of the following is not a ketone body:

e-Acetoacetic acid

f-β- hydroxyl butyric acid

g-Acetic acid

h-Acetone

44. All the following can be synthesized in human body, except:

i-Saturated FA

j-α-glycerol phosphate

k-PUFA

l-Glucose

45. All the following causes ketosis, except:

m-Starvation

n-Sever uncontrolled DM

o-High carbohydrates diet

p-High fat diet

46. Depot fat is:

q-Constant structure

r-Not affected by feeding status

s-Rich in TAG

t-Rich in phospholipids

47. End product of β- oxidation of FA is:

u-SuccinylCoA

v-Acetone

w-Acetyl CoA

x-Citric acid

Good Luck