3751. Detoxification of drugs is controlled by_____________?
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A. Cytochrome C

B. Cytochrome P450

C. Cytochrome

D. Cytochrome A

3752. Ribosomes are usually associated with______________?
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A. Plasma membrane

B. Endoplasmic reticulum

C. Mitochondria

D. Nucleolus

3753. A six- year molar begins to calcify at______________?
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A. 1 years after birth

B. 3 years age

C. Six months IU

D. At birth
3754. Serum creatine kinase-3 (CK-3) is elevated in_______________?
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A. Myocardial infarction

B. Muscular dystrophy

C. Brain tumours

D. Alcoholic cirrhosis

3755. Normal serum calcium level is_______________?
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A. 9-11 mg/dl

B. 20-30 mg/dl

C. 4-6 mg/dl

D. 19-21 mg/dl

3756. The direction of enamel rods in decidous teeth is_____________?
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A. Inclined in an apical direction in the cervical third of crown

B. Inclined in an occlusal direction in the cervical third of crown

C. None of the above

D. Same as permanent teeth

3757. R-RNA is mainly produced mainly in___________?
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A. Endoplasmic reticulum

B. Nucleus

C. Nucleolus

D. Ribosome

3758. The key to occlusion is_______________?
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A. Maxillary primary second molar

B. Maxillary primary first molar

C. Maxillary permanent first molar

D. Maxillary permanent second molar

3761. Which of the following statements about the action of the somatomedin is true ?
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A. They mediated the local effects of Somatostatin

B. They antagonize the effect of insulin

C. They promote growth of bone and cartilage

D. They inhibit protein synthesis

3763. The zygomatic bone does not articulate with________________?
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A. Maxillary bone

B. Temporal bone

C. Nasal bone

D. Frontal bone

3764. Secretin is secreted by_____________?
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A. Stomach

B. Pancreas

C. Duodenum

D. Liver

3766. In centric occlusion, the cusp tip of the maxillary canine is in alignment with which mandibular tooth_____________?
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A. Facial embrasure of canine and premolar

B. Distal ridge of the cusp of mandibular canine

C. Mesial ridge on the facial cusp of mandibular first premolar

D. incisal embrasure of canine and premolar

3767. Ammonia is detoxified in liver to form____________?
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A. Creatinine

B. Glutamine

C. Urea

D. Uric acid

3768. Gastrin is produced by _____________?
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A. All

B. Pancreas

C. Pituitary

D. Gastric antral cells

3769. Of the following is a reflex mediated by vagus ?
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A. Bile flow from liver

B. Pancreatic secretion of bicarbonate

C. Cephalic phase of gastric secretion

D. Mucous secretion from the Brunners glands

3771. Histidine is converted to histamine by_____________?
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A. Transamination

B. Decarboxylation

C. Hydroxylation

D. Reduction

3773. Pepsinogen is activated by ___________________ ?
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A. Enterokinase

B. Chymotrypsin

C. Trypsin

D. Low pH
3774. Major source of ammonia in the kidney is___________?
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A. Glutamate

B. Glutamine

C. Urea Aspartate

D. Aspartate

3775. Cholagogues are the substances, which cause______________?
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A. Contraction of the gallbladder

B. Increase secretion of bile

C. Increase concentration of bile

D. Favours acidification of bile

3776. Tertiary structure of protein is maintained by all except______________?
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A. Ionic bond

B. Disulphide bond

C. H2 bond

D. None of the above

E. Hydrophobic

3777. Normal dentition in centric occlusion, opposing contact may be expected at_____________?
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A. Buccal slopes of lingual cusps of maxillary posterior teeth

B. Buccals slopes of buccal cusps of maxillary posterior teeth

C. All slopes of lingual cusps of mandibular posterior teeth

D. Lingual slopes of lingual cusps of mandibular posterior teeth

3778. The catecholamines secreted by adrenal medulla______________?
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A. Increases the blood glucose level by favoring glycogenolysis in blood and muscle cells

B. Are under the control of parasy

C. Increase the splanchnic blood flow

D. Decrease the level o free fatty acids and ketone bodies

3779. Who is known for his work on scurvy ?
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A. John snow

B. Fracastorius

C. Edward Jenner

D. James lind
3780. All are seen in Cushing s syndrome except_______________?
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A. Hypertension

B. Hypoglycemia

C. Truncal obesity

D. Poor wound healing

3782. Urinary protein is detected by______________?
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A. Ehrlichs test

B. Barfoed test

C. Boiling test

D. Hays test

3783. Which muscle is responsible for translation of condyle ?
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A. Lateral pterygoid

B. Masseter

C. Medial pterygoid

D. Superior constrictor of pharynx

3784. Over jet is defined as______________?
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A. All the above

B. Horizontal overlap

C. Vertical overlap

D. Transverse plane discrepancy

3785. At PH 7 the binding of 2,3 DPG to hemoglobin occurs at which site ?
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A. Carboxy terminal

B. Amino terminal

C. Histidine

D. Sulphydryl group

3786. Retrusion of mandible is achieved by _______________?
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A. Lateral pterygoid

B. None of the above

C. Temporalis

D. Masseter

3787. The function of vitamin A is/are related to which of the following ?
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A. Retinal

B. All of the above

C. Retinol

D. Retinoic acid

3788. Iron is complexed in haemoglobin to_______________?
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A. Histidine

B. Leucine

C. Isoleucine

D. Valine

3789. Average daily dose of vitamin C is____________?
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A. 30 40 mg

B. 60 100 mg

C. 100 150 mg

D. 50 60 mg
3790. Which of the following is not true of Vit D_______________?
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A. Its deficiency results in rickets

B. Increase calcium absorption from the intestines

C. Its active form is calcitriol

D. Its decrease cause phosphate reabsorption from the kidneys
3791. Pancreas produce_____________?
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A. Chymotrypsinogen

B. All of the above

C. Pepsinogen

D. Hydrochloric acid

3792. Ascorbic acid_____________?
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A. Is a reducing agent

B. Is requirement for lysyl oxidase

C. Is harmless in high doses

D. Decrease iron absorption

3793. In vitamin A deficiency, patient complains of all of the following except___________?
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A. Keratosis

B. Night blindness

C. Phophoric calciuria

D. Xerophthalmia

3794. Vitamin A_____________?
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A. Is water soluble

B. Is required for formation of clotting factors

C. Deficiency causes impaired vision

D. Maintains normal plasma calcium levels

3795. Which of the following muscles moves the condyle and articular disc anterior and downwards on glenoid fossa______________?
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A. Lateral pterygoid

B. Temporalies- anterior fibers

C. Temporalis posterior fibers

D. Medial pterygoid

3796. In thyrotoxicosis , there is______________?
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A. Decrease in calcium excretion

B. Potentiation of catecholamine action

C. Increase in serum proteins which bind throxine

D. Increase in calcium excretion

3797. Cortisol______________?
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A. Secretion increases following injury

B. Tends to lower blood pressure

C. Favours protein synthesis

D. Enhances antigen antibody reactions

3800. IN occlusion, the teeth have______________?
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A. Edge- to edge contact

B. Surface to- surface contact

C. Cusp to cusp contact

D. Marginal contact