3351. Enzymes help by____________?
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A. Increasing the substrate concentration

B. Decreasing the surface tension

C. Lowering the activation energy

D. Increasing the activation energy

3352. Muscle glycogen cannot contribute directly to blood glucose level because___________?
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A. Muscle lacks phospho gluco isomerase

B. Muscle lacks glucose 6 phosphatase

C. Muscle does not contain glycogen phosphorylase

D. Absence of glucokinase

3353. Epithelial cells which ultimately keratinize are known as_____________?
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A. Non-Keratinizing cells

B. Clear cells

C. Melanocytes

D. Keratinizing cells
3354. Minor salivary glands are present in the submucosa through out the oral mucosa except for the______________?
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A. Tongue and soft palate

B. Gingiva and anterior part of hard palate

C. Lip and posterior third of the hard palate

D. Retromolar area and hard palate

3355. The first product of glycogenolysis is_____________?
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A. Glucose 1,6 diphosphatase

B. Glucose 6 phosphatase

C. Fructose 1- phosphatase

D. Glucose 1- phosphatase
3356. Lamina densa of the gingival basement membrane is rich in_____________?
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A. Type I collagen

B. Type I and III collagen

C. Type IV collagen

D. Type III collagen

3357. Lactate dehydrogenase is____________?
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A. Zymogen

B. Antienzyme

C. Coenzyme

D. Isozyme
3358. The high level clear cell present in the oral epithelium is_____________?
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A. Lymphocyte

B. Merkel cell

C. Langerhans cell

D. Melanocyte

3359. The apical foramen of a fully developed permanent tooth is usually lined by_____________?
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A. Cementum

B. Epithelial rest cells

C. The Epithelial diaphragm

D. Dentin

3360. The enzyme involved in the first committed step of glycolysis is____________?
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A. Hexokinase

B. Enolase

C. Phosphofructokinase

D. Glucose-6-Phosphatase

3361. Buccal mucosa is_______________?
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A. Orthokeratinized

B. Parakeratinised

C. Keratinized

D. Non-keratinized
3363. Which of the following is a function of the golgi apparatus ?
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A. t RNA synthesis

B. m RNA synthesis

C. Modification of proteins

D. Protein storage

3364. Which of the following enzymes use NADP as coenzyme ________________?
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A. Beta hydroxy acyl CoA dehydrogenase

B. Lactate dehydrogenase

C. Glyceraldehyde 3 phosphate dehydrogenase

D. Glucose 6-Phosphate dehydrogenase
3366. Coenzyme responsible for single carbon transfer is______________?
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A. Pyridoxine

B. THF4

C. Biotin

D. Acetyl co enzyme A

3367. Masticatory mucosa is____________?
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A. Para keratinised

B. Ortho keratinised

C. Sub keratinised

D. Non keratinised

3368. Tooth buds of permanent mandibular incisors are situated_____________?
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A. Labial to primary teeth

B. Lingual to primary teeth

C. A and B

D. Inferior to primary teeth

3369. The enzyme that splits hydrogen peroxide into water and oxygen is_____________?
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A. Catalase

B. Cytochrome P 450

C. Super oxide dismutase

D. Cytochromes

3372. Stipplings______________?
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A. Disappeared in progressing gingivitis due to edema and this change is reversible

B. Functional adaptation to mechanical impact

C. Due to alternate elevations and depressions in epithelium

D. All of the above
3373. After the eruption of crown, reduced enamel is known as_____________?
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A. Primary attachment epithelium

B. Reduced enamel epithelium

C. Secondary attachment epithelium

D. Primary enamel cuticle

3374. The enamel of the posterior teeth is thickest at____________?
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A. Middle third of lingual surface

B. Cervical third of buccal surface

C. Occlusal surface

D. Middle third of buccal surface

3375. Glycogen synthesis is increased by_____________?
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A. Insulin

B. Epinephrine

C. Cortisone

D. GH

3377. Moth eaten appearance of of enamel is seen in____________?
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A. Odontodysplasia

B. Desmolytic stage

C. Amelogenisis stage

D. Mottled enamel

3378. The oral epithelium is attached to the enamel via_______________?
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A. Desmosomes

B. Hemidesmosomes

C. Collagen fibers

D. Reticular fibers

3379. Gubernacular canal and gubernacular cord are seen in relation to____________?
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A. None of the above

B. Succedaneous teeth

C. Permanent teeth

D. Deciduous teeth

3380. Coenzyme, in an enzymatic reaction usually functions to_____________?
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A. Increase the active sites of apoenzyme

B. Enhance the specificity of apoenzyme

C. Activate the substrate

D. Accept one of the cleavage products
3381. Which is not a oligosaccharide sugar ?
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A. Galactose

B. Lactose

C. Sucrose

D. Maltose

3383. Membrane coating granules may_____________?
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A. Appear as circular with an amorphous core in keratinized epithelium

B. Packed with tonofilaments

C. Helps in adhesion of fully keratinized epithelial cells

D. Originate from golgi system
3384. The range of level of fluoride secreted by the glands into the mouth is_____________?
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A. 0.004-0.005 ppm

B. 0.007-0.005 ppm

C. 0.007-0.08 ppm

D. 0.006-0.007 ppm

3385. Muscle glycogen, which cannot contribute to blood glucose due to the absence of which enzymes ?
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A. Debranching enzyme

B. Branching enzyme

C. Phosphoglutamase

D. Glucose-6-phosphotase
3386. Biotin is required for the activity of_____________?
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A. Succinate thiokinase

B. Pyruvate carboxylase

C. Phosphohexose isomerase

D. Lactate dehydrogenase

3387. Competitive enzyme inhibition will cause_____________?
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A. Decrease of km and increase of Vmax

B. increase of km and increase of Vmax

C. Increase of km and Unchanged of Vmax

D. Decrease of km and decrease of Vmax

3389. Ubiqultin is involved in_____________?
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A. Intracellular proteolysis

B. Electron transport chain

C. Transport of ATP

D. Protein folding

3390. Cells of the spinous layer are generally_______________?
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A. None of the above

B. Smaller than the basal cells

C. Larger than the basal cells

D. same size as that of basal cells

3391. On microscopic examination enamel rods have___________?
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A. Lanullate appearance in cross-section

B. Paddle appearance in cross section

C. Key hole appearance in cross section

D. None of the above

3392. Which enzyme is associated with the mineralization_____________?
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A. Amino peptidase

B. Adenosine triphosphate

C. Alkaline phosphatase

D. Acid phosphatase

3394. Calcified tissue is absent in______________?
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A. Pulp

B. Dentin

C. Cementum

D. Enamel

3396. Oligosaccharide is________________?
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A. Glucose

B. Maltose

C. Dextrin

D. Gructose

3397. Thin leaf like structures that extend from enamel surface in to DEJ are____________?
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A. Enamel lamella

B. Perikymata

C. Enamel tufts

D. Enamel spindles

3399. In glycolysis ATP is produced by the following enzyme______________?
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A. Phosphoglycerate kinase

B. Enolase

C. Phosphohexose isomerase

D. Hexokinase

3400. The enzyme phosphofructo kinase-1 is strongly activated by_______________?
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A. Citrate

B. Cyclic AMP

C. Adenosine tri phosphate

D. Fructose 2,6 bis phosphate