3251. The primary function of the dental pulp is____________?
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A. Nutritive

B. Production of enamel

C. Production of dentin

D. Vascular supply to the teeth

3252. First appearance of tooth formation occurs in____________?
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A. 6th week IU

B. 9th week IU

C. 4th week IU

D. 2nd week IU

3254. Group of fibres, which resist the masticatory forces___________?
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A. Dentogingival

B. Transeptal

C. Horizontal

D. Oblique
3255. In cap stage, regulating factor for cusp shape formation is present in____________?
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A. Dental follicle

B. Enamel Knot

C. Dental papilla

D. Inner enamel epithelium

3257. Keratohyaline granules are found in________________?
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A. St. spinosum

B. Prickle cell layer

C. St. basale

D. St. granulosum
3258. The vermilion border requires frequent moistening because_____________?
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A. It contains more do. of sebaceous glands

B. It contains more No. of sweat glands

C. It contains less number of sweat glands

D. It contains less number of sebaceous glands
3259. perikymata are the external surface manifestations of_____________?
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A. Enamel rods

B. Pellicle

C. Nasmyths membrane

D. Incremental lines of retzius
3260. Sites where HMP shunts can occur include_______________?
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A. All of the above

B. Testes

C. WBC

D. Lactating mammary gland

E. Liver

3262. Hexokinase is a______________?
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A. Transferase

B. Oxidoreductase

C. Reductase

D. Oxidase

3263. The most accepted theory of tooth eruption is____________?
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A. Vascular theory

B. Periodontal ligament traction theory

C. Clone theory

D. Hydrodynamic theory

3264. Movement of tooth to close the intermaxillary gap during eruption is due to____________?
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A. Passive eruption

B. Physiological tooth migration

C. None of the above

D. Active eruption
3266. Basement membrane________________?
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A. Contains lamina lucida & Lamina dura

B. Consists luratihyaline granules

C. consists of desmosomes and hemi desmosomes

D. consists of lamina densa and lamina lucida
3269. Enamel spindles are formed by______________?
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A. Odontoblasts

B. Cracks

C. Ameloblasts

D. Hypocalcified rods

3270. Galactosemia commonly is due to deficiency of_____________?
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A. Galactose 1 phosphatase

B. Glucose 1 phosphatase

C. Galactose 1 phosphatase uridyl transferase

D. Glucose 6 phosphatase

3272. Stratum granulosum is not present in_____________?
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A. Non keratinized epithelium

B. Sulcular epithelium

C. Hyper parakeratosis

D. Hyper orthokeratosis

3273. All are true regarding glucose 6 phosphate deficiency except______________?
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A. Hyperuricemia

B. Hyperglycemia

C. Increased mobilization of glycogen from liver

D. Defective cori cycle

3274. Jacobsons organ is________________?
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A. All of the above

B. Ellipsoid/Cigar shaped

C. Undergoes degeneration after 4 months of intrauterine life

D. Auxillary olfactory sense organ

3276. Hammock ligament is present_______________?
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A. Between hamular notch and mandible

B. Between temporal and sphenoid bone

C. In apical area of a tooth

D. As a part of deep cervical fascia
3277. Teeth with out antagonist if erupt is called____________?
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A. Submerged

B. Supra erupted

C. Over erupted

D. Stable

3280. Masticatory mucosa in the oral cavity covers the_______________?
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A. Alveolar mucosa and vestibular fornix

B. Floor of the mouth and soft palate

C. Lip and cheek

D. Gingiva and hard palate
3282. Epithelial attachment is derived from____________?
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A. Reduced enamel epithelium

B. Inner enamel epithelium

C. Dental papilla

D. Dental sac

3283. Elongated rete pegs are seen in______________?
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A. Alveolar mucosa

B. Attached gingiva

C. Buccal mucosa

D. Floor of the mouth

3285. Iron is present in all of the following except_______________?
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A. Cytochrome

B. Myoglobin

C. Pyruvate kinase

D. Catalase

3286. Length of enamel rods is_____________?
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A. Less than the thickness of enamel

B. None of the above

C. Equal to the thickness of enimal

D. Greater than the thickness of enamel
3288. The first sign of future deciduous teeth as a thickening of oral ectoderm appears at about_____________?
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A. 34th day of Intra uterine life

B. 56th day of Intra uterine life

C. 25th day of Intra uterine life

D. 20 wks of Intra uterine life

3289. Stratum Germinativum of the oral epithelium is the term given to_______________?
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A. Spinous cells and granular cells

B. Basal cells and parabasal spinous cells

C. Basal cell layer

D. Granular cell layer

3290. Epithelial attachment is_____________?
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A. All of the above

B. Attachment of ameloblasts to the tooth

C. Microscopically it resembles basal lamina

D. Derived from secondary attachment epithelium

3291. The uptake of glucose by the liver increase following a carbohydrate meal because____________?
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A. Glucokinase has a low Km for glucose

B. Hexokinase in liver has a high affinity for glucose

C. GLUT-2 stimulated by insulin

D. There is increase in phosphorylation of glucose by glucokinase
3292. In mineralization which one of the following is known as Epitaxy ?
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A. Booster Mechanism

B. Cartier/s Adenosine Triphosphate theory

C. Alkaline Phosphatase theory

D. Seeding theory
3295. All these reactions take place inside the mitochondria except____________?
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A. Krebs cylce

B. Electron transfer

C. Urea cycle

D. EMP pathway
3296. Which of the following is not a product of HMP shunt_____________?
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A. NADPH

B. D fructose 6 phosphate

C. D glyceraldehyde 3 phosphate

D. D sedoheptulose 5 phosphate
3297. The activity of this plasma enzyme is responsible virtually for all plasma cholesterol esters in humans_______________?
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A. Lecithin cholesterol acyl transferase (LCAT)

B. HMG CoA reductase

C. Phospho mevalonate kinase

D. Pyrophospho mevalonate decarboxylase

3298. Km of an enzyme is_____________?
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A. Numerically identical for all isozymes that catalyses a given reaction

B. Substrate concentration at half maximal velocity

C. The normal physiological substrate concentration

D. Dissociation constant

3299. Serum alkaline phosphatase level increase in_______________?
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A. Carcinoma of prostate

B. Hyperparathyroidism

C. Myocardial infarction

D. Hypothyroidism

3300. Which of the following is correct of the pyruvate dehydrogenase enzyme complex ?
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A. Requires TPP as cofactor

B. Catalyzes a reversible reaction

C. Catalyzes the conversion of pyruvate to oxaloacetate

D. It is present in cytoplasm