Log In/Sign Up/Register

Forget Password

Enter your email id to receive password.

Captcha Not readable? Change text.

Enter the text of above image in the box below.


Log In/Sign Up/Register

clinical microbiology

microbiology mcqs questions

Questions starts with :-

Virus mediated transfer of host DNA from one cell to another ...

Subject :-


Correct answer :- *** Hidden ***

Explanation :-

erium to another by a virus. It also refers to the process whereby foreign DNA is introduced into another cell via a viral vector. Transduction does not require cell-to

Hidden microbiology MCQ question - Full MCQ only for facebook users.

To see full MCQ you must share it on facebook. Click the share button below.

Share On Facebook

Membership plans

MBBS 1st Year Test Series- RS.600/- Get Details

MBBS 2st Year Test Series- RS.800/- Get Details

MBBS 3st Year Test Series- RS.1,000/- Get Details

MBBS 4st Year Test Series- RS.1500/- Get Details

Harison Based Test Series- RS.900/- Get Details

Full test series- RS.2,000/- Get Details

Select membership plan from above to join online test series for medical PG entrance exams like AIPGMEE, state PG, FMGE, DNB, etc.

2013-11-16 10:18:16
Virus mediated transfer host DNA from one cell another known as: ConjugationTransduction TransformationIntegration Transduction isprocess DNA transferred from one bacterium another byvirus also refers the process whereby foreign DNAintroduced into another cell via viral vector Transduction does not require cell-to-cell contact (occurs conjugation) and itDNAase resistant iscommon tool used molecular biologists stably introduceforeign gene intohost cell's genome Depending oftypelife cycledifferent phage species two typestransduction can occur They generalized and specialized transduction Ref: ReviewMedical Microbiology and Immunology 11th Edition Chapter 4;Biology ofProkaryotes Lengeler Page 406; Lateral DNA Transfer: Mechanisms and Consequences Frederic Bushman Page
Read More Similar Articles

Subject :-microbiology

Topic :- clinical microbiology

following statements about Prions true They infectious proteins They made bacteria and virusThey have rich nuclear materialThey can cultured cell free media Prions infectious proteins devoid any nucleic acid (DNA and RNA) Ref: Medical Microbiology Jawetz 24th Edition Page 581; Harrison’s Principles Internal Medicine 16th Edition Page 2495; Textbook Microbiology Ananthanarayan 7th Edition Page 567 .......

Subject :-microbiology

Topic :- clinical microbiology

following most common pathogens responsible for nosocomial pneumonias ICU Gram positive bacteriaGram negative bacteria MycoplasmaVirus infections Most common organisms causing nosocomial pneumonia gram negative bacteria 50-70% cases reach lower airways aspiration gastric contents microaspiration upper airway secretions Most common organism pseudomonas aeruginosa followed enterobacteriacea Staphylococci aureus second gram negative bacteria and accounts for -30% Anaerobic bacteria found 10-30% cases Ref: Infectious Diseases Sherwood Gorbach 3rd Edition Page 477 .......

With reference Escherichia coli infections, the following are true, EXCEP

Subject :-microbiology

Topic :- clinical microbiology

With reference Escherichia coli infections following true EXCEPT: Enteroaggregative coli associated with Persistant diarrhoeaEnterohemorrhagic coli can cause haemolytic uraemic syndromeEnteroinvasive coli produces disease similar salmonellosis Enterotoxigenic coli common cause travelers' diarrhoea Enteroinvasive Coli shares many genetic and clinical features with Shigella not salmonella Enterotoxins produced initially induce secretory small-bowel diarrhea Subsequently colonize and invades colonic mucosa resulting development inflammatory colitis characterized fever abdominal pain tenesmus and scant stool containing mucus blood and inflammatory cells Symptoms usually self-limited (7–10 days) Ref: Harrisons Internal Medicine 18th Edition Chapter 149 .......

What the mechanism action cholera toxin the small intestine? ADP-r

Subject :-microbiology

Topic :- clinical microbiology

mechanism action cholera toxin small intestine ADP-ribosylation regulatory protein Activation guanylate cyclaseInhibition adenyl cyclaseInhibition protein synthesis Cholera toxin example A-B model toxins subunit toxin binds enterocyte receptors active toxin subunit activates adenylate cyclase intestinal epithelial cells ADP ribosylation subunit protein intestinal cells This prevents protein from being turned off and result excess production cAMP cAMP turn act second messenger activate protein kinase intern activates specific cell proteins that control secretion electrolytes Ref: Textbook Pathology Krishna Page 178; Medical Microbiology Fritz Kayse Page 298; Microbiology and immunology Monica Gandhi Page .......

Adenosine deaminase deficiency seen the following: Common variable immun

Subject :-microbiology

Topic :- clinical microbiology

Adenosine deaminase deficiency seen following: Common variable immunodeficiencySevere combined immunodeficiency Chronic granulomatous diseaseNezelof syndrome The most common cause Autosomal Recessive Severe Combined Immunodeficiency Disease (SCID) deficiency enzyme adenosine deaminase (ADA) Ref: Text Book Microbilogy Ananthanarayan 8th Edition Pages 146 156 158 Robbins Basic Pathology Page 235 .......

year old man presented with abdominal pain, vomiting and bloody diarrhea,

Subject :-microbiology

Topic :- clinical microbiology

year old man presented with abdominal pain vomiting and bloody diarrhea his stool sample grew Escherichia coli pure culture following serotype coli causative agent hemorrhagic colitis 157:H7 159:H7O 107:H7O 55:H7 Enterohemorrhagic coli O157:H7 serotype coli causing hemorrhagic colitis associated with ingestion undercooked hamburger sprouts unpasteurized milk juice EHEC produces shiga toxin and can cause colitis after incubation period days typically produces watery diarrhea that progress bloody diarrhea after few hours few days Fatigue abdominal pain nausea and vomiting associated complaints Mechanism enterohemorrhagic colitis appears vascular endothelial damage that leads platelet aggregation and initiation the coagulation cascade This turn leads ischemia colon and results hemorrhagic colitis Ref: Mayo Clinic Gastroenterology and Hepatology Board Review Stephen Hauser 4th Edition Page 197 .......

Which the following toxin acts inhibiting protein synthesis? Cholera toxinLT

Subject :-microbiology

Topic :- clinical microbiology

following toxin acts inhibiting protein synthesis Cholera toxinLT enterotoxigenic coliPertusis toxinShiga toxin Shiga toxin also known verotoxin was first identified major cause dysentry called Shigella dysentriae Shiga toxin contains enzymatic domain and binding domains bind globotriaosylceramide (Gb3) glycosphingolipid surface cells and complex internalized internalized shiga toxin hydrolyse ribosomes preventing further protein synthesis Shiga toxin composed two distinct peptide subunits: The first located larger subnit N-glycosidase that hydrolyzes adenine from specific sites ribosomal RNA mammalian 60s ribosomal subunit irreversibly inhibiting protein synthesis The second binding site subunit that recognizes glycolipids target cell membranes (glycolipid Ref: Toxins and Hemostasis: From Bench Bedside Manjunatha Kiri Page 642-643 Textbook Pathology Krishna Page 178 Interaction Pathogenic Bacteria with Host Cells Virginia Clark Volume 236 Page Microorganisms foods Microbiological Specifications Food Pathogens International Commission Microbiological Specifications for Food Page127.......

All the following organisms cause toxin mediated diarrhea, except: Vibrio choleraeVi

Subject :-microbiology

Topic :- clinical microbiology

All following organisms cause toxin mediated diarrhea except: Vibrio choleraeVibrio parahaemolyticus Staphylococcus aureusShigella Vibrio parahemolyticus gram negative non spore forming bacterium present mostly marine environment halophilic bacterium that causes acute gastroenteritis following ingestion contaminated seafood such raw fish shellfish After incubation period 12–24 hours nausea and vomiting abdominal cramps fever and watery bloody diarrhea occurs Fecal leukocytes often observed The enteritis tends subside spontaneously 1–4 days with treatment other than restoration water and electrolyte balance enterotoxin has yet been isolated from this bacterium Vibrio parahemolyticus grown TCBS agar produce blue green colonies Negative string test and absent sucrose fermentation help differentiate parahemolyticus from cholera Ref: Food Safety Hazrd Guidebook Richard Lawley Laurie Curtis Page Handbook Food Toxicology Deshpande Page 507 Superantigens and Superallergens Gianni Marone Page Med Lab Tech Vol 2nd Edition Kanai and Mukherjee Page 533 .......

All the following are given global prominence the VISION 2020 goal, EXCEPT:

Subject :-ophthalmology

Topic :- preventive ophthalmology

All following given global prominence VISION 2020 goal EXCEPT: OnchocerciasisCataractGlaucoma Refractive errors Vision 2020: Right Sight Objective: global initiative eliminate avoidable blindness year 2020 Global target diseases include: Cataract childhood blindness trachoma refractive errors low vision onchocerciasis Ref: Khurana 5th Edition Page 205 .......

Get Medical alerts via email - Subscribe below

Delivered by FeedBurner


List of our Associates and Partners


MBBSDost was started by Dr. Vinay Yadav in year 2009. He was a medical student then and wanted to utilize his web based hobbies to start discussion on medical topics and AIPGMEE preparation. Thus MBBSdost was created as a simplediscussion based blog for AIPGMEE

This blog was instant hit amongst medical students and doctors preparing for AIPGMEE and state PG entrance exams.

Soon Online test series was started for AIPGMEE and thousands of medical students and doctors started using it. Many question from the test series started comming directly or indirectly is AIGMEE and state PG entrance exams. This furthor enhanced popularity of the website.

Over the time mbbsdost grew bigger and bigger. It became the leading website to help in preparation of medical PG exams like AIPGMEE, AIIMS-PG, PGI, JIPMER, MIMHANS, state PG entrance exams, USMLE, FMGE etc.

Today it has developed into India's largest medical education Portal.


With more than 120,000 members MBBSdost.com is the leading medical education portal of India.
Alexa Rank us in top 11,000 India websites.

Our Facebook pages

Being a doctor has more than 165,443 likes

medical Freaks has more than 118, 745 likes

We send regular updates to more than 1 lakh suscribers through email and more than 40 thousand suscribers through whatsapp.

We help medical students and doctors by providing help in -

  1. Studies of medical college.
  2. Clinical training and skill development.
  3. Preparation of Medical PG exams.
  4. Medical Jobs.
  5. Prescription Software for Clinics and hospitals
  6. Courses after MBBS.

MBBS Dost is the Part of the Vinay Heartbeat Education Pvt Ltd.

Contact Us

Address :

Dr. Vinay Yadav, House No-94, Block-A, Nasirpur Colony, New Delhi – 110045.

Phone - +91-9953578794

Email - admin@mbbsdost.com

Follow us :

Free medical alerts for Medical students. Includes mnemonics, MCQs, cases studies., medical news, CME and conference info etc. Click here to start now.