SPSC Lecturer BioChemistry Past Paper 01-03-2013

21- Protein embedded in cell membrane does not function as:

A. Pores
B. Carriers
C. Receptors
D. Enzymes

Answer : A. Pores

22- The carbohydrate which prevents intravascular clotting of blood is:

A. Glucose
B. Heparin
C. Dermatan sulphate 
D. Hyaluronic acid

Answer : B. Heparin

23- The most abundant protein in mammals is:

A. Albumin
B. Collagen
C. Elastin
D. Hemoglobin

Answer : B. Collagen

24- Albumin and globulin are examples of:

A. Fibrous proteins 
B. Globular proteins
C. Conjugated proteins 
D. Derived proteins

Answer : B. Globular proteins

25- The only water soluble vitamin that acts as an antioxidant is:

A. Ascorbic acid
B. Folic acid 
C. Nicotinic acid
D. Pantothenic acid

Answer : A. Ascorbic acid

26- Which of the following enzyme increases in prostate cancer:

A. Alkaline Phosphatase
B. Acid Phosphatase
C. Lactate dehydrogenase 
D. Lipase

Answer : B. Acid Phosphatase

27- Lymphopenia occurs in the following diseases except:

A. Radiotherapy
B. Chemotherapy
C. Hepatitis
D. Tuberculosis

Answer : C. Hepatitis

28- Rate of ketogenesis increases in:

A. Diabetes mellitus
B. Lactation
C. Diabetes insipidus 
D. Hypoglycemia

Answer : A. Diabetes mellitus

29- The enzymes with same biologic activity but different structure are called:

A. Isoenzymes
B. Zymogens
C. Apoenzymes
D. Holoenzymes

Answer : A. Isoenzymes

30- Important metabolic pathway in mitochondria is:

A. TCA cycle
B. Glycolysis
C. Lipogenesis
D. Transamination

Answer : A. TCA cycle

31- During starvation or prolonged fasting which of the following tissues is unable to use ketone bodies for their energy requirements:

A. Brain
B. Liver
C. Kidneys
D. Cardiac muscle

Answer : B. Liver

32- Which one of the following proteins transports iron from blood to the bone marrow:

A. Albumin
B. Globulin
C. Prothrombin
D. Transferrin

Answer : D. Transferrin

33- The chromatographic technique which enables isolation and purification of a protein simultaneously is:

A. Adsorption chromatography
B. Gel permeation chromatography 
C. Affinity chromatography
D. Ion-exchange chromatography

Answer : C. Affinity chromatography

34- In the genetic code of human nuclear DNA, one of the codons specifying tyrosine is UAC, another codon specifying this same amino acid is:

A. UCC
B. UAU
C. AUG
D. GUA

Answer : B. UAU

35- All of the following statements about the fluid mosaic model of biological membranes are true except:

A. Lipid molecules in the membrane readily undergo lateral diffusion
B. Lipid molecules in the membrane readily undergo transverse (flip-flop) diffusion
C. The saturated hydrocarbon chains of lipid molecules in the membrane undergo
carbon-carbon bond rotation
D. Integral membrane proteins can undergo lateral diffusion 

Answer : B. Lipid molecules in the membrane readily undergo transverse (flip-flop) diffusion

36- A coenzyme required by some enzymes that transfer one-carbon groups is:

A. Pyridoxal phosphate 
B. Tetrahydrofolate
C. Thiamine pyrophosphate 
D. Flavin adenine dinucleotide

Answer : B. Tetrahydrofolate

37- The mean radius of the earth of approximately:

A. 3000 kms
B. 400 kms
C. 6400 kms
D. 7000 kms

Answer : C. 6400 kms

38- Insolation heats up the land masses more quickly than the water bodies because:

A. Water needs more energy to warm
B. Rocks are bad conductor of heat 
C. Landmasses are solid 
D. None of these

Answer : A. Water needs more energy to warm

39- The study of time in relation to earth’s history is called:

A. Geochronology
B. Geohistology
C. Geography
D. None of these

Answer : A. Geochronology

40- Latitudes and longitudes both:

A. Run parallel to equator 
B. Pass through poles 
C. Run perpendicular to each other
D. None of these

Answer : C. Run perpendicular to each other

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