MCQs on General Biochemistry

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# 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

MCQs on Occlusion - Oral Anatomy

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# 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

MCQs in Microbiology - Bacteriology Part 2

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# 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

MCQs on Microbiology - Bacteriology Part 1

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 # 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

MCQs on Pharmacology - Chemotherapy / Antibiotics

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# 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 

MCQs on Mycology and Parasitology

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# 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 choice for culturing yeast form of dimorphic fungi is -

a) Brain - heart infusion

b) Sabouraud's

c) Sabouraud's plus antibiotics

d) Any medium incubated at 35-37°C

# Pseudohyphae are seen in -

a) Alternaria

b) Aspergillus

c) Oosporium

d) Candida albicans

# Dermatophytes are fungi infecting -

a) Subcutaneous tissue

b) Systemic organs

c) Nails, hair and skin

d) Superficial skin and deep tissue

# Candida is most often implicated in causation -

a) Conjunctivitis

b) Tinea capitis

c) Desert rheumatism

d) Thrush

# Asexual spores of fungi are following except -

a) Arthospores

b) Chlamydospores

c) Blastospores

d) Ascospores

# Candida albicans causes all of the following except-

a) Endocarditis

b) Mycetoma

c) Meningitis

d) Oral thrush

# Transmission of all of the following intestinal parasites takes place by the feco-oral route except: (AIPG-2001)

a) Giardia lamblia

b) Ascaris lumbriocoides

c) Strongyloides

d) Entamoeba

# Hydatid cyst is: (AIIMS, AIPG-96)

a) Parasitic in nature

b) Fungal

c) Congenital

d) Viral

# Investigation of choice for invasive amoebiasis is: (AIPG-2002)

a) Indirect hemagglutination

b) ELISA

c) Counter immune electrophoresis

d) Microscopy

# L.D. bodies are seen in: (KAR-2000)

a) Kala azar

b) Toxoplasmosis

c) Malaria

d) Sleeping sickness

# Megaloblastic anemia is caused by: (KAR-97)

a) Dog tapeworm

b) Hookworm

c) Fish tapeworm

d) Threadworm

# Causative organism of Kala azar is: (KAR-97)

a) Plasmodium ovale

b) Leishmania donovani

c) Entamoeba histolytica

d) Toxoplasma

# Black Water Fever is caused by:

a)Plasmodium vivax

b)Plasmodium falciparum

c)Leishmania donovani

d)Microfilaria

# How is Gutta Percha Sterilized?

# 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.