Dentosphere : World of Dentistry

The correct answers are highlighted in green. # Detoxification of drugs is controlled by: a) Cytochrome b) Cytochrome P450 c) Cytochrome C d) Cytochrome A # In cytochrome P450, P stands for: a) Structural proteins b) Substrate protein c) Pigment d) Polymer # Detoxification or protective synthesis occurs by: a) Oxidation b) Reduction c) Conjugation d) Any of the above # The major driving force for formation of membrane lipid bilayer is: a) Hydrogen bonding b) Hydrophobic interactions c) Vander waal forces d) Not known

The correct answers are highlighted in green. # The maxillary teeth which have single antagonist are: (MAN-94, 95) a) Lateral incisors b) Permanent canines c) Permanent central incisors d) Third molars # In occlusion, the teeth have: (MAN-94, AIIMS-93) a) Cusp-to-cusp contact b) Edge-to-edge contact c) Marginal contact d) Surface-to-surface contact # In normal occlusion, with which groove / surface of the permanent mandibular first molar does the mesiobuccal cusp of the permanent maxillary first molar occlude: a) Distobuccal groove b) Mesial Surface c) Mesiobuccal surface d) Transverse groove

The correct answers are highlighted in green. # Malignant pustule is referred to: (KAR-2003, AIIMS-2K) a) Facio-cervical actinomycosis b) Cutaneous anthrax c) Infected squamous cell carcinoma d) None of the above # One of the following is a zoonotic disease: (KAR-2001) a) Anthrax b) Typhoid c) Bacillary dysentery d) Cholera # Causative agents of "Vincent's angina": (KAR-98, 2001) a) Borrelia vincenti and Fusobacterium fusiformis b) Borrelia recurrents and Bacteroides c) Borrelia burgoloferi and Lactobacillus d) Leptospira and Treponema pallidum

The correct answers are highlighted in green. Feel free to share with your friends, colleagues, and students.  # The causative organism of syphilis is: (AIPG -94) a) Borrelia burgolorferi b) Chalamydia trachomatis c) Leptospira interrogans d) Treponema pallidum # On a stained slide, Clostridium tetani has the appearance of a: (MAN-95) a) Bunch of grapes b) Chain of beads c) Drum stick d) Safety pin # An oxidase-positive, gram-negative rod which produces a bluish-green pigment has been grown in culture from a swab obtained from an infected burn wound. This organism is susceptible to gentamicin, ticarcillin and tobramicin, but resistant to all the other antibiotics. Which of the following organisms is it likely to be? (MAN-95) a) Escherichia coli b) Klebsiella pnemoniae c) Proteus mirabilis d) Pseudomonas aeruginosa

The correct answers are highlighted in green. # The most common side effect of the oral administration of ampicillin is: (MAN-94, AIIMS-93) a) Anaphylactic shock b) Diarrhoea c) Oral candidiasis d) Renal failure # Which of the following drugs is likely to damage the eighth cranial nerve when administered for a long period of time? (MAN-94) a) Ethambutol b) Isoniazid c) Rifampicin d) Streptomycin  

The correct answers are highlighted in green. # The mechanism by which most fungi cause disease is: (APPSC-99) a) exotoxin production b) lecithinase production c) hypersensitivity d) coagulase production # Germ tubes are formed mainly by: (TNPSC-99) a) Candida albicans b) Candida stellatoidea c) Candida tropicalis d) Candida pseudotropicalis # Fungal infection of human beings is called as: (KAR-2000) a) Mucorsis b) Mycosis c) Fungosis d) Micromia # Fungus capable of forming fungal ball is: (TNPSC-99) a) Penicillium b) Aspergillus c) Mucor d) Rhizopus # Aflatoxins are produced by: (KAR-03) a) Aspergillus niger b) Aspergillus fumigatus c) Aspergillus flavus d) All of the above # The culture media for fungus is - a) Tellurite medium b) NNN medium c) Chocolate agar medium d) Sabourauds medium # A sporangium contains: a)Spherules b)Sporangiospores c)Chlamydospores d)Oidia # The medium of c...

# Gutta Percha can effectively be sterilized by? (AIIMS-07) a) Dry heat b) Autoclaving c) Hot salt sterilizer d) Chemical solutions Answer: D. Chemical Solutions Gutta-percha cones may be kept sterile in screw-capped vials containing alcohol. A Gutta percha cone freshly removed from the manufacturer’s box should be immersed in 5.2% sodium hypochlorite for 1 minute, then rinse the cone with hydrogen peroxide and dry it between 2 layers of sterile gauze. 

The correct answers are highlighted in green. Feel Free to share with your friends and colleagues and your Students too. # Cleft lip is operated at what age: (MAN -01) a) 1 month b) 6 months c) 10 weeks d) 1 year # The ideal time of repair of cleft of hard palate is: (KAR -03) a) At birth b) Between 3-6 months of age c) Between 12-15 months of age d) After 2 years of age # The ideal time of repair of cleft lip is: (KAR -03) a) At birth b) Between 3-6 months of age c) At 1 - 1 1/2 years of age d) At 1 1/2 to 2 years of age # Pierre Robbin syndrome is: a) Cleft palate with syndactyly b) Cleft palate with mand. hypoplasia and respiratory obstruction c) Cleft lip with mandibular hypoplasia d) Cleft lip # Hynes pharyngoplasty is used to improve a child's: a) Appearance b) Teething c) Speech d) Feeding # Unilateral clefts are most common on: a) Left side b) Right side c) Median d) None of the above # Common...

# Father of Health Statistics is: A. John Snow B. John Graunt C. Fredrick Mckay D. Pierre Fauchard Answer: B, John Graunt Graunt, along with William Petty, developed early human statistical and census methods that later provided a framework for modern demography. He is credited with producing the first life table, giving probabilities of survival to each age. Graunt is also considered as one of the first experts in epidemiology, since his famous book was concerned mostly with public health statistics.

The correct answers are highlighted in green. Please read these MCQs once quickly and test yourself by watching the video at the bottom of the page. # Oedema may be caused by any of the following EXCEPT: (MAN -95) a) An increase in the plasma protein concentration b) An increase in the capillary hydrostatic pressure c) An increase in the capillary permeability d) Lymphatic obstruction # The most common site of origin for venous thrombi leading to pulmonary embolism is: (KCET- 09) a) Ascending aorta b) Portal vein c) Deep leg veins d) Right atrium # Anasarca means a) Abnormal inflammatory process b) Severe generalized swelling c) Absence of proliferation of vessels following inflammation d) Presence of pus # Edema is due to: (KAR -98) a) Increased albumin in blood and decreased globin b) Decreased albumin cone, in blood c) Increased osmotic pressure d) None of the above # Which of the following is common in all forms of shock? (MAN -9...

# Tumor which shows origin from more than one germ layers is known as: A. Teratoma B. Pleomorphic Tumors C. Choristoma D. Hamartoma The Correct Answer is A. Teratoma Teratomas are complex tumors composed of tissues derived from more than one of the three germ layers - endoderm, mesoderm and ectoderm. Hamartoma is a mass of disorganized but mature cells indigenous to the particular site.

# Which of the following tumors is most aggressive? (AIPG 91, AIIMS 2004) A. Ameloblastoma B. Odontogenic Myxoma C. Odontoma D. Fibrocarcinoma Answer: B, Odontogenic Myxoma ODONTOGENIC MYXOMA - Aggressive, intraosseous neoplasms derived from embryonic odontogenic mesenchyme probably arise from the dental papilla or follicular mesenchyme. - Nearly all lesions are found in the tooth bearing areas of maxillary and mandibular bone. - Mandibular lesions are commonly found in the premolar-molar area. - The lesions often produce multilocular radiolucency with a "soap bubble" or "honey comb" appearance in the bone. - Thin and extremely delicate septa of bone are often seen to course through the radiolucent area and produce a "spider-web" like or "tennis racket" like appearance. CLICK HERE TO VIEW  ALL MCQS

The correct answers are highlighted in green. # Protrusion of tongue is brought out by (MAN - 02) a) Genioglossus b) Intrinsic muscles of tongue c) Styloglossus d) Palatoglossus # Hypoglossal nerve supplies to all the following muscles EXCEPT (MAN - 99, AP-06) a) Palatoglossus b) Genioglossus c) Hyoglossus d) Styloglossus # The lymphatic drainage from the tip of tongue first passes to: (MAR-98) a) Submental nodes b) Supra clavicular nodes c) Sub mandibular nodes d) Superior deep cervical nodes # When a patient protrudes his tongue, it deviated to the right. Which of the following nerves is damaged? (MAN-99) a) Left hypoglossal b) Glossopharyngeal c) Right hypoglossal d) Facial nerve # Impulses generated in the taste buds of the tongue reach the cerebral cortex vie the: (KAR-97) a ) Thalamus b) Internal Capsule c) Cervical spinal nerve d) Trigeminal nerve  #  In which of the following papillae of the tongue are the ta...